2011 seven year electricity planning statement (2012 … year electricity planning statement... ·...

2011 Seven Year Electricity Planning Statement (2012-2018)

Power Network Development Department Asset Management Directorate

November 2011

400 kV OHL

220 kV OHL

Power Station

400kV Grid Station

220kV Substation

400 kV Cable

220 kV Cable

132 kV Cable

Legend

KSA Border

Liwa

Madinat Zayed

Sila

ShuweihatS1 & S2

Ruwais

Mirfa

Central

SAS

Mussafah

AAPS

Dahma

Al Hayer

Maziyad

Al Wagon

Sanaiya

Arad

Sultanate of Oman

Dhaid

GIC

E48

City Centre

Asab

BuHasa

Central & Western Region

Abu Dhab

i Islan

ds

Al AinRegion

SalamatKhazna

Mahawi

Sweihan

ADST

Dabiya

Rumaithy

E19

Gaithy

Bab

UAN

Bahia

SASN

REEM

ADST

E48

E19

To TANE

SADIYAT

Abu Dhabi Islands400 kV OHL

400 kV U/G Cable

To

GC

C In

terc

onne

ctio

n

ICAD

Steel I

Qidfa

Umm Al Oush

To Mahawi

Bahia

Sadiyat

ReemDelma Island

Ras Al Khaimah

QusahwiraShah- SGD

Masdar Shams

Ghantoot

Emal

AAIC

Ajman

New Fujairah

To TWPS

Sir Baniyas

AASW

Al FoahRamah

Zakher

WASIT(OMAN)

Al Maqam

Shamkha

SamhaTANE

Taweela-P.S

Ain Al Faydha

Masdar Hydrogen

Braka

Hameem

Warsan

Sharjah

Steel II

Asab

Switching

Shahama

Gasco-Elixier

400 kV OHL

220 kV OHL

Power Station

400kV Grid Station

220kV Substation

400 kV Cable

220 kV Cable

132 kV Cable

Legend

KSA Border

Liwa

Madinat Zayed

Sila

ShuweihatS1 & S2

Ruwais

Mirfa

Central

SAS

Mussafah

AAPS

Dahma

Al Hayer

Maziyad

Al Wagon

Sanaiya

Arad

Sultanate of Oman

Dhaid

GIC

E48

City Centre

Asab

BuHasa


Abu Dhab

i Islan

ds

Al AinRegion

SalamatKhazna

Mahawi

Sweihan

ADST

Dabiya

Rumaithy

E19

Gaithy

Bab

UAN

Bahia

SASN

REEM

ADST

E48

E19

To TANE

SADIYAT


400 kV U/G Cable

To

GC

C In

terc

onne

ctio

n

ICAD

Steel I

Qidfa

Umm Al Oush

To Mahawi

Bahia

Sadiyat

ReemDelma Island

Ras Al Khaimah

QusahwiraShah- SGD

Masdar Shams

Ghantoot

Emal

AAIC

Ajman

New Fujairah

To TWPS

Sir Baniyas

AASW

Al FoahRamah

Zakher

WASIT(OMAN)

Al Maqam

Shamkha

SamhaTANE

Taweela-P.S

Ain Al Faydha

Masdar Hydrogen

Braka

Hameem

Warsan

Sharjah

Steel II

Asab

Switching

Shahama

Gasco-Elixier

400 kV OHL

220 kV OHL

Power Station

400kV Grid Station

220kV Substation

400 kV Cable

220 kV Cable

132 kV Cable

Legend

KSA Border

Liwa

Madinat Zayed

Sila

ShuweihatS1 & S2

Ruwais

Mirfa

Central

SAS

Mussafah

AAPS

Dahma

Al Hayer

Maziyad

Al Wagon

Sanaiya

Arad

Sultanate of Oman

Dhaid

GIC

E48

City Centre

Asab

BuHasa


Abu Dhab

i Islan

ds

Al AinRegion

SalamatKhazna

Mahawi

Sweihan

ADST

Dabiya

Rumaithy

E19

Gaithy

Bab

UAN

Bahia

SASN

REEM

ADST

E48

E19

To TANE

SADIYAT


400 kV U/G Cable

To

GC

C In

terc

onne

ctio

n

ICAD

Steel I

Qidfa

Umm Al Oush

To Mahawi

Bahia

Sadiyat

ReemDelma Island

Ras Al Khaimah

QusahwiraShah- SGD

Masdar Shams

Ghantoot

Emal

AAIC

Ajman

New Fujairah

To TWPS

Sir Baniyas

AASW

Al FoahRamah

Zakher

WASIT(OMAN)

Al Maqam

Shamkha

SamhaTANE

Taweela-P.S

Ain Al Faydha

Masdar Hydrogen

Braka

Hameem

Warsan

Sharjah

Steel II

Asab

Switching

Shahama

Gasco-Elixier

TRANSCO/AMD/PNDD TRANSCO 2011 7YPS (2012-2018) Nov’ 2011 of 85 Main Report

Forward

I have the pleasure in releasing the 2011 Seven Year Electricity Planning Statement (7YPS) for transmission within the Emirate of Abu Dhabi and, where appropriate, our network outside of the authorized area covering the period 2012-2018. In producing this document, we have endeavored to ensure that our customers, both existing and future, are presented with an opportunity to understand the scale and type of transmission network operated by us. We have sought to ensure that customers are able to identify areas of the network where additional investment is proposed in order to increase available capacity or otherwise ensure that network performance continues to attain the targets expected from such a critical infrastructure provider. This is the second 7YPS released in response to Condition 15 of the Transmission and Despatch Licence that provides detailed short to medium-term plans for the transmission network. The plans included in the 7YPS are linked to the needs and investment requirements and are based on the network development strategy covering the period 2010-2030 that places much greater emphasis on the trends and drivers which provides a long-term vision for taking the transmission system forward consistent with Government’s 2030 vision. Feedback on this 7YPS is most welcome in order that TRANSCO is able to continue to adjust its planning and development strategies to meet the regulatory, customer and stakeholder requirements and expectations. Copies of approved 7YPS could be downloaded from our website www.transco.ae. Dr. Najib H Dandachi Asset Management Director TRANSCO


Table of Contents

Main Report Forward………………………………………………………………………………………......…2 Table of Contents………………………………………………………………….………...…..….3 Acronyms and Definitions………………………………………………………………….........…5 Executive Summary………………………………………………………………….……...…..….8

1 Introduction…………………………………...…………………….………………….....…21

2 Network Development Strategy……………………………………………………..…...….24

3 Planning Principles…………………………………………...………………………..….…39

4 Demand-Generation Background……………..………...…………………………………...44

5 Planned Transfers…………….…..………………………………………………………….52

6 Evolution and Performance of Transmission Network…………………..………………….55

7 Asset Management……………………….………………..…………………………………64

8 Transmission System Capabilities and Opportunities………………….….…….…...……...65

9 Capital Delivery……...……...……………...………………………….……………………76


Table of Contents (continued)

Attachments

Attachment-A

Electricity generation capacity expansion plan and electricity demand forecast schedules.

Attachment-B

Electricity transmission network topology (400kV, 220kV, 132kV system). Geo-map of transmission network topology (400kV and 220kV system) for Year 2011 & 2018.

Attachment-C

Forecast power flows and loading on the transmission system for Year 2011-2018.

Attachment-D

Fault levels at the transmission nodes for Year 2011-2018.

Attachment-E

Transmission system dataset.

Attachment-F

Brief description on major existing generation plants and planned committed generation projects.


Acronyms and Definitions

7YPS: Seven Year Planning Statement

AC: Alternating Current

AED: UAE Dhirams

AAPS: Al-Ain Power Station

AADC: Al-Ain Distribution Company

ADDC: Abu Dhabi Distribution Company

ADNOC: Abu Dhabi National Oil Company

ADWEA: Abu Dhabi Water and Electricity Authority

ADWEC: Abu Dhabi Water and Electricity Company

ACCC: Aluminum Conductor Composite Core

ACSR: Aluminum Conductor Steel Reinforced

CSP: Concentrated Solar Power

CAPEX: Capital expenditure

DEWA: Dubai Electricity and Water Authority

DISCOs: Distribution Companies

DSM: Demand Side Management

EMAL: Emirates Aluminum Smelter Plant

ENG: Emirates National Grid

FEWA: Federal Electricity and Water Authority

GCC: Gulf Cooperation Council

GDP: Gross Domestic Product

GENCOs: Generation and Desalination Companies (Producers)

GTACSR: Gap-type Aluminum Conductor Steel Reinforced

GW: Giggawatt

HVAC: High Voltage Alternating Current

HVDC: High Voltage Direct Current


HVDC LCC: High Voltage Direct Current Line Commuted Converter

ICAD: Industrial City of Abu Dhabi

kV: Kilovolt

KPIZ: Khalifa Port and Industrial Zone

KSA: Kingdom of Saudi Arabia

MEAV: Modern Equivalent Asset Value

MW: Megawatt

MVA: Megavoltampere

NPV: Net Present Value

OPEX: Operational expenditure

PAS55: 55th Publicly Available Specification

PV: Photovoltaic

RSB: Regulation and Supervision Bureau

SASN/UAN: Sas Al Nakheel/Umn Al Nar

STATCOM: Static Synchronous Compensator

SVC: Static VAr Compensator

TRANSCO: Abu Dhabi Transmission and Despatch Company

UPC: Abu Dhabi Urban Planning Council

USERs: DISCOs, GENCOs, ADNOC, Non-embedded customers, interconnected utilities

UAE: United Arab Emirates

VAr: Volt Ampere

VSC: Voltage Sourced Converters

WLCC: Whole Life Cycle Cost

XLPE: Cross Linked Polyethylene Insulated


Planned transfer is the planned power flows across the identified boundary/lines. Transfer capability is the maximum power flow across the identified transmission boundary without causing any unacceptable conditions as a result of secured events. Secured event is the event that relates to a fault outage of a single transmission circuit under Intact System; or outage of a single transmission circuit with planned outage of another transmission circuit, a generating unit or reactive element. Identified generation capacity is the total gross electricity generation capacity available from all existing power plants, power plants which are under construction and committed power plants less the off-set capacity available due to life-time capacity retirements. Required generation capacity is the total gross electricity generation capacity required to satisfy the generation security of supply standard that takes into account the generation planning criteria and other factors such as forced outage rate, demand forecast error, spinning reserve.


Executive Summary

E1 Introduction

Condition 15 of the Transmission Licence requires the Abu Dhabi Transmission and Despatch

Company (TRANSCO) to prepare a seven year planning statement (7YPS) annually in a form

approved by the Regulation and Supervision Bureau (RSB or Bureau). In relation to the electricity

transmission system, the requirement is to contain the following information in each of the seven

succeeding financial years:

a) Capacity, forecast power flows and loading on each part of the transmission system, and fault

levels for each electricity transmission node.

b) Plans for capital expenditure necessary to ensure the relevant transmission system meets the

security and performance standards and future demands.

The 7YPS has been developed in the context of the TRANSCO’s network development strategy

for the period to 2030 that sets a long-term vision for taking the transmission system forward. The

network development strategy places much greater emphasis on the trends and drivers which

provides a long-term vision for taking the transmission system forward consistent with

Government’s 2030 vision. The 7YPS describes more detailed short to medium-term plans for the

transmission system and is linked to the needs and investment requirements for the period 2012-

2018.

The main purpose of the 7YPS is to enable the Users seeking the use of the transmission system, to

identify and evaluate the opportunities available when connecting to and making use of such

system. Such opportunities shall be guided by the “Statement of Connection Charging

Methodology” to make a reasonable estimate of the charges to which they would be liable for the

provision of such services. It also gives a forward view on the proposed transmission infrastructure

expansion plans to meet the forecast demand growth and planned new generation

capacity. However, we recommend prospective Users of the system to contact TRANSCO directly

if they want to fully understand the opportunities available to them.

This is the second 7YPS which contains the latest updated information and replaces all Statements

released earlier. The 7YPS covers the planning horizon 2012-2018. 2011 7YPS (2012-2018) is

based on the best available updated information from ADWEC and Users; updated project scope


and status. The cutoff date for input data is 30 April 2011. All information received after this date

will be updated in TRANSCO 2012 7YPS (2013-2019). The 7YPS presents a wide range of

information relating to the planning and development of 400kV, 220kV and 132kV transmission

system within the Emirate of Abu Dhabi and, where appropriate, TRANSCO’s network outside of

the authorized area.

E2 Network Development Strategy

TRANSCO’s network development strategy is to continue to develop a flexible, reliable, secure,

accessible, robust, economical, efficient, environmentally friendly and safe transmission system

that meets the needs of its customers in a manner consistent with its License obligations.

This is achieved through:

• Implementing a structured asset management process that takes cognizance of best practice

asset management principles for the development and stewardship of the transmission network

and requirements for capital assurance governance.

• Continuing with the development of 400kV main bulk transmission system. Given the

uncertainty in the demand and generation background, the possible need to migrate to 765kV

or HVDC as the main overlay transmission system option across the West-East corridor is to

be kept under review, particularly if significant level of additional generation capacity beyond

Shuweihat S3 and Braka nuclear plant are contracted in the Western region, and that there is

increased requirement to provide power to Northern Emirates.

• Incremental deployment and integration of new technologies and best available practice.

It is intended that the development of the transmission network will be done in such a manner to:

• Have minimum negative side-effects on the environment and society.

• Accommodate large central and decentralized generation and storage.

• Enable active participation of consumers including demand response.

• Provide high quality of supply and reliable power that satisfy the expectation and needs of the

customer and comply with international best practice and standards.


• Optimize asset utilization and operate efficiently through integrated outage management, risk

assessment, improved process, resource management and use of technology and decision

support tools.

• Anticipate and respond to system disturbances.

• Operate resiliently under unforeseen events.

Figure E-1 shows the expected 400kV transmission system configuration by 2030.

Figure E-1 Expected 400kV transmission system configuration by 2030

2025 Best View (30GW)

Al-Ain

South West

Dahma

Sweihan

Mussafah

Shahama

Warsan

Dhaid

Ras Al

Khaimah

To Salwa 400kV

Grid Station

(KSA)

Sharjah

SASN

Taweelah

Qidfa

Sila

ICAD

MahawiBahia

Al Wasit Area

(Sultanate of Oman)Shamkha

Hameem

Al-Ain Airport

Ajman

New Fujairah

City

Mirfa

Wathba

SAS Al Nakheel

Beach

Al Qurm

ADST

ReemSadiyat

Bahia

Zayed

Sports City

Braka

400kV grid station

400kV Tower

(double circuit)

400kV Cable

Single CircuitSingle 400kV

Overhead Line Circuit

400kV grid station associated with Power Plant

Madinat Zayed

Bab

ChemaWEyaat

Shuweihat

Ruwais


E3 Demand-Generation Background

Global peak electricity demand (include supplies to Abu Dhabi Emirate and Northern Emirates) is

forecast to increase to between 16GW-24GW by 2018 according to ADWEC’s 2011 forecast

update. This represents an average growth rate of about 9% and 16% per annum for the period

2010-2018 related to the two demand forecasts. For the purposes of preparing this 7YPS an

intermediate demand level of about 20GW by 2018 is also considered. This together with the

generation background described below is consistent with the “best-view” long-term transfers

established in the network development strategy. The demand scenarios are used to indicate

uncertainty and market volatility in the forecast. The principle demand drivers are industrial,

residential and commercial development expansions; and export supplies to Northern Emirates.

The proportion of industrial demand relative to peak demand is forecast to increase as the UAE

diversifies its economy and there is the potential for variations of the locational development of

demand within the outlier demand scenario.

To meet these demands, the existing power generation plants contribute about 12GW (as on 2010)

of capacity. New committed generation projects identified to date which are expected to be

integrated into the main bulk transmission grid during the period 2011-2020 are:

• Shuweihat S2 (~1.62GW) and Shuweihat S3 (~1.65GW) combined cycle fossil fuel plants

located adjacent to the existing Shuweihat S1 site in the Al Gharbia region.

Shuweihat S2 is integrated to transmission network and operational in 2011.

• The Braka site in the Gharbia region has been identified to promote nuclear generation of total

capacity 5.6GW by 2020. Generator units of 1400MWe are expected to be integrated to the

transmission system.

• Shams-1 concentrated solar power (CSP) plant with a maximum installed capacity of 110MW

at a facility located south of Madinat Zayed in the Gharbia region.

• Nour-1 photovoltaic solar power (PV) plant with a maximum installed capacity of 100MW at a

potential facility in Al-Ain region.

The above generation projects contribute an additional capacity of about 9.5GW by 2020, among

other potential new generation additions (e.g. relocation of Al Zawra gas turbines to Mirfa site,

Masdar hydrogen plant at Shuweihat).

It should be recognized that the actual commitment to the new conventional generation capacity

takes place on a shorter time scale (about 4 years) to close the emerging gap.


Some of the existing generation plants are expected to retire during the period 2017-2020. These

are located at Mirfa (186MW), Umn Al Nar (778MW), Al-Ain Power Station (256MW) and

Madinat Zayed Power Station (109MW). The available capacity off-set due to the closure of above

existing generation will be about 1.3GW by 2020. To compensate for the expected generation

retirements, there could be a possibility to locate some new generation capacity (of the order of

1GW) either by re-developing the existing Umn Al Nar (UAN) plant site (in Eastern region close

to Abu Dhabi Island) or locate some new generation capacity close to Sweihan (in Al-Ain region).

In either case, no major 400kV transmission reinforcement works are required as the

existing/planned main bulk transmission infrastructure by 2020 in UAN and Sweihan has

sufficient transmission capability to evacuate the above generation.

To meet the TRANSCO’s best view planned transfers after Shuweihat S3 generation; there is a

need to integrate an additional major new generation into the transmission system from 2015.

In addition to Taweela-C option (in Eastern region), there are two other potential generation sites

options available. These are Al Mirfa (in Gharbia region) and Hamria/Ras Al Khaimah

(in Northern Emirates). While the need to utilize all of the above three generation sites could be

possible in the long-term, nevertheless one of the above-mentioned generation sites is considered

to be the most likely next generation site to satisfy the demand-supply gap and the emerging gap

between the identified generation capacity and the required generation capacity upto 2020.

400kV transmission reinforcement is required across Shamkha-Sweihan corridor common for all

the three potential generation site options in addition to the generation integration works required

at their respective generation sites. For the potential generation site option at Mirfa (in Gharbia

region) only, major 400kV transmission reinforcement is required within the Gharbia region and

across the West-East corridor to evacuate power generation from the Gharbia region.

Figure E-2 shows the demand-generation background for the period 2010-2018.

Figure E-3 shows the region-wise demand forecast for the 20GW intermediate scenario.


Figure E-2 Demand-generation background upto 2018.

Figure E-3 Region-wise demand forecast for the 20GW intermediate scenario.

0

5

10

15

20

25

30

2010 2011 2012 2013 2014 2015 2016 2017 2018

Year

GW

Installed Gen Capacity (Existing) Committed Gen Capacity 22.5GW Scenario (16GW by 2018)

32.5GW Scenario (18.5GW by 2018) 20GW Intermediate Scenario (20GW by 2018) 38.5GW Scenario (24GW by 2018)

Global demand growth rate (2010-2018)

ADWEC's 22.5GW scenario = 9.2%


20GW Intermediate scenario = 13.1%


8,485

9,845

11,167

13,436

14,730

16,85117,582

18,783

20,046

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

20,000

22,000

24,000

2010 2011 2012 2013 2014 2015 2016 2017 2018

Year

Pea

k D

eman

d (M

W)

Abu Dhabi Islands' Eastern Region

Gharbia (Western) Region Al-Ain Region

Northern Emirates Incl. Water Pump & Aux. Loads Auxiliary & Desalination Process Loads in AD Emirate

Transmission Losses Coincident Total System Peak

Growth Rate (2010-2018)

System (AD+NE) = 13.1%; Abu Dhabi Emirate = 11.9%

Abu Dhabi Islands' = 7.8%; Eastern Region = 15.7%

Gharbia Region = 24.4%; Al-Ain Region = 6.3%


E4 Regional and International Grid Interconnections

To support the Government of Abu Dhabi initiative to bolster the domestic energy security,

TRANSCO’s transmission system will increasingly integrate with Emirates National Grid (ENG)

and Gulf Cooperation Council (GCC). Figure E-4 shows the simplified high-level grid

interconnection arrangement (existing and current plans) with ENG/GCC grids.

Figure E-4 Simplified high-level grid interconnection arrangement with ENG/GCC grids.

Existing 400kV Grids

Committed 400kV Grids

Sweihan

Warsan

Dhaid

Ras Al Khaimah

Shuweihat

To Salwa 400kV

Grid Station

(KSA)

Sharjah

Qidfa

Sila

Al Wasit Area

(Sultanate of Oman)

Ajman

New Fujairah

City

Taweela

New 400kV Tower (double circuit)

TRAN

SCO Transmission Netw

ork

in

Abu D

habi Emirate

Foah


Existing 220kV Tower (double circuit)

400kV OHL Tower (double circuit)

Generation Site


Potential maximum transfers between TRANSCO and regional/international grids under “Secured

Event” conditions could include:

• ±1GW through the current existing Northern GCC 400kV interconnector between UAE-KSA.

• ±170MW through the current existing Southern GCC 220kV interconnector between UAE-

Oman. Maximum transfers are planned to be increased to about ±1GW through the future

400kV interconnector between UAE-Oman.

• ±2GW through the current existing ENG interconnections to Northern Emirates (i.e. through

400kV interconnector between Taweela-Warsan, and 400kV interconnector between Fujairah

Qidfa-Sweihan) with possible range of exports.

These interconnections will not only enhance the security of supply but also reduce the spinning

reserve requirements and facilitate power exchange among member utilities and states, while

providing a mechanism to mitigate against gas supply shortages and uncertainty in the levels of

demand growth. It will also reduce plant procurement cost through achieving higher efficiency and

plant load factors apart from reducing the global operating costs of the integrated electricity

market.

E5 Planned Transfers

The requirements for the transmission system development and its associated investments are

primarily driven by the demand and generation backgrounds identified above and the resulting

power transfers on the transmission system. There are uncertainties associated with the demand

and generation backgrounds as with any forecasts and plans. These uncertainties will affect future

planned power transfers on the transmission system and hence the way the transmission system

develops. Using scenarios analysis, the planned power transfers on the transmission system are

established for the most probable demand-generation scenarios envisaged during the period 2010-

2018 and ensure consistency with the long-term approach. Envelopes of possible transfers are

established and the most likely (best-view) planned power transfers are identified across each of

the transmission corridors that is used as a basis to inform how best to develop the transmission

system. The approach adopted in the 7YPS in establishing the envelope of possible transfers and

planned transfers takes into account the following considerations:


• Different demand forecast scenarios namely 22.5GW scenario (i.e. 16GW by 2018),

Intermediate scenario (i.e. 20GW by 2018) and 38.5GW scenario (i.e. 24GW by 2018).

• Different locational development of next possible generation (Mirfa, Taweela-C, Hamria) to

meet the above demands from 2014/2015 through to 2018 after Shuweihat S3 generation.

Figure E-5 shows the envelope of possible transfers and the best-view planned transfers across the

five identified boundary corridors for the peak demand-generation background during the period

2010-2018. It also shows the transfer capability (represented in blue text) across the identified

boundary corridors for the peak demand-generation background in 2010.

Figure E-5 Envelope of possible transfers and best-view planned transfers for period 2010-2018

-2,000

-1,000

0

1,000

2,000

3,000

4,000

5,000

6,000

2010 2015 2020 2025 2030

Bou

ndar

y T

ran

sfer

s (M

W)

-2 ,000

-1 ,000

0

1,000

2,000

3,000

4,000

5,000

6,000

2010 2012 2014 2016 2018

Al-Ain region

Northern Emirates

-2,000

-1,000

0

1,000

2,000

2010 2012 2014 2016 2018

Bou

ndar

y T

rans

fers

(M

W)

-1,000

0

1,000

2,000

3,000

4,000

5,000

2010 2012 2014 2016 2018

Bou

ndar

y T

rans

fers

(M

W)

0

2,000

4,000

6,000

8,000

2010 2012 2014 2016 2018

Bou

ndar

y T

rans

fers

(MW

)

0

1,000

2,000

3,000

4,000

2010 2012 2014 2016 2018

Bou

ndar

y T

rans

fers

(MW

)

0

1,000

2,000

3,000

4,000

5,000

2010 2012 2014 2016 2018

Bou

ndar

y T

rans

fers

(MW

)


E6 Evolution of Transmission Network

Using the best view planned transfers as the basis a network development plan has been produced.

The evolution of the transmission network based on the best-view planned transfers is detailed

below. This is consistent with the network development strategy.

Major committed 400kV transmission system expansion projects are expected to be completed

during the period 2011-2015 to meet the system needs and to accommodate committed new

generation projects.

The 400kV transmission facilities from the existing Shuweihat Power Station is capable of

evacuating power from both Shuweihat S1 & S2 generation (total about 3.2GW) to meet the

demand requirements in the Western (Gharbia) region and exports to the Abu Dhabi Region. To

evacuate power generation from the committed Shuweihat S3 generation (about 1.65GW), a new

400kV grid station is planned within the Shuweihat S3 plant site. A new 400kV grid station is also

planned at Braka in 2015 to facilitate the integration of the nuclear power plant in 2017/2018. The

400kV West-East corridor reinforcements ensure an integrated approach to evacuating power from

S3 and Braka while meeting the demands in the Western region.

New 400kV grid stations and related 400kV overhead line works are expected to be integrated to

the transmission network to meet the respective regions’ demand requirements. These are

400/220kV grid stations in Ruwais and Bab (in Gharbia region); 400/220kV grid station in ICAD

and 400/132kV grid stations in Bahia, Mahawi and Shamkha regions (in Eastern region); and

400/132kV grid stations in Ajman, Sharjah and New Fujairah City (in Northern Emirates).

A new 400kV grid station and related 400kV overhead line works at Sila have been completed in

2011 as part of the UAE plan to integrate with the GCC grid. A new 400kV grid station and related

400kV overhead line works are planned to facilitate increased interconnection with Oman grid.

400kV XLPE underground cables’ projects along the Abu Dhabi Island-Sadiyat-Bahia corridor

and Sas Al Nakheel-Mahawi-Mussafah corridor have been initiated to enable the policy decision to

dismantle the 400kV overhead lines along the said corridor.


Major 400kV transmission reinforcement’s works are required within Western region and across

West-East region corridor to evacuate power from the Braka Nuclear Power Plants during the

period 2017-2018. There is a need to establish new intermediate 400kV grid station at some point

in the Eastern region (e.g. Hameem Junction near ICAD/Mussafah) not only to facilitate large

volumes of power transfers across West-East region corridor but also strengthen the overall 400kV


Figure E-6 shows the expected 400kV and 220kV transmission network configuration by 2018 to

meet the best view planned transfers.

Figure E-6 Expected 400kV and 220kV transmission network by 2018

400 kV OHL

220 kV OHL

Power Station

400kV Grid Station

220kV Substation

400 kV Cable

220 kV Cable

132 kV Cable

Legend

KSA Border

Liwa

Madinat Zayed

Sila

ShuweihatS1 & S2

Ruwais

Mirfa

Central

SAS

Mussafah

AAPS

Dahma

Al Hayer

Maziyad

Al Wagon

Sanaiya

Arad

Sultanate of Oman

Dhaid

GIC

E48

City Centre

Asab

BuHasa


Abu Dhab

i Islan

ds

Al AinRegion

SalamatKhazna

Mahawi

Sweihan

ADST

Dabiya

Rumaithy

E19

Gaithy

Bab

UAN

Bahia

SASN

REEM

ADST

E48

E19

To TANE

SADIYAT


400 kV U/G Cable

To

GC

C In

terc

onne

ctio

n

ICAD

Steel I

Qidfa

Umm Al Oush

To Mahawi

Bahia

Sadiyat

ReemDelma Island

Ras Al Khaimah

QusahwiraShah- SGD

Masdar Shams

Ghantoot

Emal

AAIC

Ajman

New Fujairah

To TWPS

Sir Baniyas

AASW

Al FoahRamah

Zakher

WASIT(OMAN)

Al Maqam

Shamkha

SamhaTANE

Taweela-P.S

Ain Al Faydha

Masdar Hydrogen

Braka

Hameem

Warsan

Sharjah

Steel II

Asab

Switching

Shahama

Gasco-Elixier

400 kV OHL

220 kV OHL

Power Station

400kV Grid Station

220kV Substation

400 kV Cable

220 kV Cable

132 kV Cable

Legend

KSA Border

Liwa

Madinat Zayed

Sila

ShuweihatS1 & S2

Ruwais

Mirfa

Central

SAS

Mussafah

AAPS

Dahma

Al Hayer

Maziyad

Al Wagon

Sanaiya

Arad

Sultanate of Oman

Dhaid

GIC

E48

City Centre

Asab

BuHasa


Abu Dhab

i Islan

ds

Al AinRegion

SalamatKhazna

Mahawi

Sweihan

ADST

Dabiya

Rumaithy

E19

Gaithy

Bab

UAN

Bahia

SASN

REEM

ADST

E48

E19

To TANE

SADIYAT


400 kV U/G Cable

To

GC

C In

terc

onne

ctio

n

ICAD

Steel I

Qidfa

Umm Al Oush

To Mahawi

Bahia

Sadiyat

ReemDelma Island

Ras Al Khaimah

QusahwiraShah- SGD

Masdar Shams

Ghantoot

Emal

AAIC

Ajman

New Fujairah

To TWPS

Sir Baniyas

AASW

Al FoahRamah

Zakher

WASIT(OMAN)

Al Maqam

Shamkha

SamhaTANE

Taweela-P.S

Ain Al Faydha

Masdar Hydrogen

Braka

Hameem

Warsan

Sharjah

Steel II

Asab

Switching

Shahama

Gasco-Elixier

400 kV OHL

220 kV OHL

Power Station

400kV Grid Station

220kV Substation

400 kV Cable

220 kV Cable

132 kV Cable

Legend

KSA Border

Liwa

Madinat Zayed

Sila

ShuweihatS1 & S2

Ruwais

Mirfa

Central

SAS

Mussafah

AAPS

Dahma

Al Hayer

Maziyad

Al Wagon

Sanaiya

Arad

Sultanate of Oman

Dhaid

GIC

E48

City Centre

Asab

BuHasa


Abu Dhab

i Islan

ds

Al AinRegion

SalamatKhazna

Mahawi

Sweihan

ADST

Dabiya

Rumaithy

E19

Gaithy

Bab

UAN

Bahia

SASN

REEM

ADST

E48

E19

To TANE

SADIYAT


400 kV U/G Cable

To

GC

C In

terc

onne

ctio

n

ICAD

Steel I

Qidfa

Umm Al Oush

To Mahawi

Bahia

Sadiyat

ReemDelma Island

Ras Al Khaimah

QusahwiraShah- SGD

Masdar Shams

Ghantoot

Emal

AAIC

Ajman

New Fujairah

To TWPS

Sir Baniyas

AASW

Al FoahRamah

Zakher

WASIT(OMAN)

Al Maqam

Shamkha

SamhaTANE

Taweela-P.S

Ain Al Faydha

Masdar Hydrogen

Braka

Hameem

Warsan

Sharjah

Steel II

Asab

Switching

Shahama

Gasco-Elixier


E7 Asset Management

The transmission network is comparatively young. However, there will be requirements for assets

approaching the end of their useful lives to be managed and replaced at an appropriate time. Asset

management process improvements are required to capture the “knowledge to build only what

needed”. Integrated outage management and risk assessment needs to be considered for improved

operational efficiency. Maintenance practices and resource management processes shall be

programmed and managed innovatively to better position the transmission network for next

20 years of operation and maintenance.

It should be noted that TRANSCO recent management practice is to move towards achieving

PAS55 requirements. This is to be achieved through a structured asset management process that

takes cognizance of best practice asset management principles for the development and

stewardship of the transmission network and requirements for capital assurance governance. The

PASS55 framework includes policies, procedures and processes for managing the asset base and

also embraces continuous improvement - an aspect important to TRANSCO as it seeks to better

understand its assets to identify the short- and long-term replacement requirements. As part of the

PASS55 process and the associated need of a long term network development strategy,

consideration has not only been given to the requirements of the transmission system to

accommodate load growth but also to the requirements to replace assets as they come to the end of

their useful life or where their performance or technologies employed result in inefficiency.

In the short to medium term, the average total forecast replacement expenditure is expected to be

less than 1% of the total load-related expenditure for the next five years. The asset class that

contributes to the replacement expenditure is transformers, switchgear, protection and auxiliary

systems. This is due to their age reaching the end of useful life and technology being obsolete.


E8 Capital Delivery

The transmission system development requirements and associated investments are largely driven

by the demand and generation background and the resulting power transfers on the transmission

system. As there will continue to be a degree of uncertainty in the realization of the volume,

location and timing of demand and generation backgrounds in any given area, the potential

transmission reinforcement plans shall be established in a phased manner and that the options are

maintained at minimum cost to provide a least regret solution.

In view of the economic downturn and greater uncertainty in the development requirements; some

project proposals and schemes are evaluated with intent of optimizing the assets’ utilization taking

into account the potential risks. The risks could be if the demand does not materialize as expected

or if the demand comes early, project delays and its impact on network performance and security

of supply could result. Risk mitigation measures through various scenario/optioneering approaches

are built into the planning proposals by engaging relevant Stakeholders and Users in order to

achieve a consensus on the optimum balance of overall benefits/savings and risk trade-off.

Considering the current economic scenario, TRANSCO has already taken action in delaying some

planned assets or relocating elsewhere if the contracts already awarded. Hence, there is a

likelihood of potential deviations of some project proposals and schemes included in this 7YPS.

Chapter-9 provides a brief high-level summary of capital and replacement projects. These include

only the major on-going, currently under tendering process and new planned power projects to

meet the future demands and performance standards for the period 2012-2018. These projects have

been categorized according to their needs and drivers. Whilst some of these identified seven year

capital projects shall be initiated depending on their priority level and subject to the receipt of

approvals from relevant authorities, for others it is proposed to continue monitor the developments

of the market and update the plans accordingly.

The detailed capital delivery and capital forecast for the on-going and planned power projects to

meet the future demands and performance standards including the replacement projects are

reported separately and released only to the RSB. In that report TRANSCO have taken the

opportunity to maintain the capital delivery transparency by presenting for regulatory review a

year-on-year view of planned and delivered capital performance.

TRANSCO/AMD/PNDD TRANSCO 2011 7YPS (2012-2018) Nov’ 2011 of 85 Report

1.0 Introduction

Condition 15 of the Transmission Licence requires Abu Dhabi Transmission and Despatch

Company (TRANSCO) to prepare seven year planning statement (7YPS) annually in a form

approved by the Regulation and Supervision Bureau (RSB or Bureau). In relation to the electricity

transmission system, the requirement is to contain the following information in each of the seven

succeeding financial years:

a) Capacity, forecast power flows and loading on each part of the transmission system, and fault

levels for each electricity transmission node.

b) Plans for capital expenditure necessary to ensure the relevant transmission system meets the

security and performance standards and future demands.

The Sector Law requires the Abu Dhabi Water and Electricity Company (ADWEC) to prepare a

demand forecast and accordingly secure the future generation capacity to meet the short and long-

term requirements of the Sector.

The 7YPS has been developed in the context of the TRANSCO’s network development strategy

for the period to 2030 that sets a long-term vision for taking the transmission system forward. The

network development strategy places much greater emphasis on the trends and drivers which

provides a long-term vision for taking the transmission system forward consistent with



2018.

The main purpose of the 7YPS is to enable the Users seeking the use of the transmission system, to

identify and evaluate the opportunities available when connecting to and making use of such

system. Such opportunities shall be guided by the “Statement of Connection Charging

Methodology” to make a reasonable estimate of the charges to which they would be liable for the

provision of such services. It also gives a forward view on the proposed transmission infrastructure

expansion plans to meet the forecast demand growth and planned new generation

capacity. However, we recommend prospective Users of the system to contact TRANSCO directly

if they want to fully understand the opportunities available to them.


This is the second 7YPS which contains the latest updated information and replaces all Statements

released earlier. The 7YPS covers the planning horizon 2012-2018. 2011 7YPS (2012-2018) is

based on the best available updated information from ADWEC and Users; updated project scope

and status. The cutoff date for input data is 30 April 2011. All information received after this date

will be updated in TRANSCO 2012 7YPS (2013-2019). The 7YPS presents a wide range of

information relating to the planning and development of 400kV, 220kV and 132kV transmission

system within the Emirate of Abu Dhabi and, where appropriate, TRANSCO network outside of

the authorized area.

The 7YPS update contains the following chapters:

a) Network development strategy

This chapter summarizes the network development strategy for the period to 2030 that sets a long-

term vision for taking the transmission system forward. It places much greater emphasis on the

trends and drivers which provides a long-term vision for taking the transmission system forward

consistent with Government’s 2030 vision.

b) Planning principles

The principles used for the planning and development of the electricity transmission system are

briefly described. For ease of understanding, these principles are summarized under five categories

namely the general criteria, connections conditions, generation connection criteria, main

interconnected transmission system criteria and demand connection criteria. These principles are

fully described in the latest versions of the Electricity Transmission Code and Electricity

Transmission System Security Standard.

c) Demand-generation background

The requirement for the transmission system development and its associated investments is

primarily driven by the demand and generation backgrounds. In this chapter, the demand-

generation trends and the choice of the key assumptions are summarized. Based on the electrical

connectivity and geographical dispersion, the capacity and demand forecast at each part of the

transmission network are highlighted.


d) Planned transfers

This chapter summarizes the possible transfers and best-view planned transfers based on the

demand-generation backgrounds that determine the requirements for the transmission system

developments and its associated investment plans.

e) Evolution and performance of transmission network

The evolution of 400kV, 220kV and 132kV transmission system within the Emirate of Abu Dhabi

and, where appropriate, the TRANSCO network outside of the authorized area up to 2018 are

presented. The evolution of the transmission network is based on the best-view planned transfers.

A brief description of its impact on the system performance is described. The forecast power flows

on the transmission system in PSS/E format; fault levels for each electricity transmission node for

valid load conditions for the best-view scenario are included.

f) Asset management

The requirements for assets approaching the end of their useful lives to be managed and replaced

at an appropriate time are briefly summarized in this chapter.

g) Transmission system capabilities and opportunities

This chapter describes bulk transmission system capabilities which give an indication of the extent

to which the system can accommodate the circumstances outside the chosen likely best view

planned transfers. It also provides an appreciation of opportunities available in the transmission

system to accommodate new generation and demand in across the system.

h) Capital delivery

The chapter summarizes the on-going and planned power projects to meet the future demands and

performance standards. These projects have been categorized and explicitly identify the needs and

drivers for the investment program. However, the details related to their capital delivery and

investments are reported separately and released only to the RSB. In that report TRANSCO have

taken the opportunity to maintain the capital delivery transparency by presenting for regulatory

review a year-on-year view of planned and delivered capital performance.


2.0 Network Development Strategy

TRANSCO has over the years developed a modern and reliable transmission system making use of

best available technology to provide a high degree of energy security. TRANSCO aims to continue

to develop, operate and maintain a safe, flexible, accessible, robust, reliable, and efficient

transmission system that meets the needs of its customers in a manner consistent with its License

obligations. This is to be achieved through a structured asset management process that takes

cognizance of best practice asset management principles for the development and stewardship of

the transmission network and requirements for capital assurance governance.

TRANSCO’s power network development strategy for the period to 2030 provides a long-term

vision for taking the transmission system forward and provides direction to the 7YPS and its

associated investment plans. The strategy places much greater emphasis on the trends and drivers

which provides a long-term vision for taking the transmission system forward consistent with



2018.

2.1 Challenges

Over the period to 2030 the development of the transmission system will face many challenges.

High levels of projected future demand growth along with changing customer and social needs that

influence the location and timing of demand development will require greater participation and

active engagement with customers. Meanwhile, there are uncertainties in the future primary

generation energy mix and associated demand-generation backgrounds. There is a need to manage

these uncertainties and reduce the risk in making investment decisions, while limiting if not

avoiding congestion on the transmission system. Efforts to mitigate the effects of global climate

change combined with a shortage of domestic gas will encourage promoting low-carbon and

sustainable generation resources (including renewable sources), energy storage, demand side

management and other forms of energy sources. While the transmission network is comparatively

young, there is a need to ensure that the requirements for assets approaching the end of their useful

lives are managed and replaced at an appropriate time. These replacements shall be programmed

and managed innovatively to better position the transmission network for next 20 years of


operation and maintenance. All these require greater understanding and managing the technical

challenges, and thereby create opportunities for integrating new technologies, operation and

maintenance practices that are now available particularly in primary transmission equipment, and

information and communication technology.

2.2 Objectives

TRANSCO has two options to meet these challenges and fulfill the expectations of stakeholders. It

could either continue the development of the transmission network “as is” or adopt fresh thinking

and innovation. This requires a shared vision and strategic implementation plan to ensure the

aspirations of all stakeholders in the transmission system are met. The strategic plan presented in

this report adopts a holistic approach to the development and stewardship of the transmission

system with the aim of building sufficient flexibility and robustness into its future system

architecture to accommodate uncertainties.

The long-term network development strategy for the period to 2030 (20 years) aims to provide an

optimized vision for taking the transmission system forward that takes into account the

government objectives and policies, particularly those associated with the United Arab Emirates

(UAE) future social, environmental and economic requirements. The Abu Dhabi Economic Vision

2030 envisaged a real Gross Domestic Product (GDP) average target growth rate of about 6.4%

per annum for the period 2010-2030. The Abu Dhabi Urban Planning Council (UPC) developed

the “Plan Abu Dhabi 2030-Urban Structure Framework Plan” calibrated to achieve the target

population growth rate at about 4.8% for the period 2010-2030. The electricity transmission

infrastructure continues to be developed consistent with the above set policy targets among others

to support the future economic development of the Abu Dhabi Emirate.

The adopted transmission network development strategy along with the application of relevant

novel technologies will ensure achieving the following objectives:

• Fulfill the expectations of society.

• Facilitate sufficient energy resources to meet the current and future demand within the Emirate

and to allow Abu Dhabi’s continued contribution to the energy requirements of the UAE.


• Secure the domestic energy supplies to minimize vulnerabilities associated with unplanned

domestic system disruptions, import disruptions, and other crises.

• Provide accessibility in granting connection access to all network users and benefits to

customers at the earliest opportunity, particularly for renewable power sources and high

efficiency local generation with zero or low carbon emissions.

• Reliable in assuring and improving the security of supply standards, transmission code and

quality of supply to accommodate the customer requirements having different technical

characteristics.

• Economical by providing the best value through innovation and efficient energy management

while supporting economic competitiveness and diversification by facilitating supply of

reasonably priced energy and tariff regulations.

• Facilitate implementation of Abu Dhabi Water and Electricity Authority (ADWEA) Demand

Side Management (DSM) program. This program presents policies, means and techniques to

achieve a scale of possible reduction of electricity demand keeping high standards of living and

customer satisfaction.

• Flexible in fulfilling the customers’ needs and broader spectrum of stakeholders whilst

responding to the changes and challenges ahead.

• Environmentally friendly and safe. Protect the environment by facilitating renewable and

alternative energy technologies, mitigating the negative effects of traditional energy

production, and achieving increased energy efficiency among consumers within the Emirate.

The target renewable energy share is set at 7% by 2020.

• Reduce uncertainty and risk to investment decisions.

• Ensure end of life renewal of assets for sustainable operation of the grid.

2.3 Principle Long-Term Drivers and Trends

The principle drivers and trends which will shape the long-term development of the power

transmission system and the investment plans and thereby achieve the above objectives with

improved transmission performance are:


a) Electricity demand

Electricity is the critical enabler for the economic and social development of the UAE.

Peak electricity demand (including supplies to Abu Dhabi Emirate and Northern Emirates) is

forecast to increase from 8.5GW (in 2010) to between 22.5GW-40.5GW by 2030 according to

ADWEC’s 2011 forecast update. Figure 2-1 shows the historical and future electricity demand

forecast up to 2030.

Figure 2-1 Historical and future electricity demand forecast

Source GDP data from Ministry of Economy Website (from 2001-2006) & Abu Dhabi Economic Vision 2030 (from 2006-2030). Demand data from ADWEC received in March 2011.

The principle demand drivers are industrial expansion; new mega residential and commercial

developments; and export supplies to Northern Emirates. The proportion of industrial demand

relative to peak demand is forecast to increase as the UAE diversifies its economy. There is also

the potential for variations of the locational development of demand within the 22.5GW-40.5GW

scenarios.

0

50

100

150

200

250

300

350

400

450

500

2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 2026 2028 2030

Year

GD

P -

US

$ b

illio

n

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

Pea

k D

eman

d (G

W)

Real GDP 38.5GW Scenario 22.5GW Scenario

40.5GW Scenario 32.5GW Scenario

Real GDP Growth Rate

2000-2010: 11.4% (Actual)

2010-2030: 6.4%

ADWEC Demand Growth Rate

2000-2010: 9.8% (Actual)

2010-2030: 5% (for 22.5GW Scenario) 6.9% (for 32.5GW Scenario) 7.8% (for 38.5GW Scenario) 8.1% (for 40.5GW Scenario)


b) Regional and international grid interconnections

To support the Government of Abu Dhabi initiative to bolster the domestic energy security,

TRANSCO’s transmission system will increasingly integrate with Emirates National Grid (ENG)

and Gulf Cooperation Council (GCC) transmission system. Figure 2-2 shows the simplified high-

level grid interconnection arrangement (existing and current plans) with ENG/GCC grids.

Figure 2-2 Simplified high-level grid interconnection arrangement with ENG/GCC grids.

Potential maximum transfers between TRANSCO and regional/international grids under “Secured

Event” conditions could include:

• ±1GW through the current existing Northern GCC 400kV interconnector between UAE-KSA.


Committed 400kV Grids

Sweihan

Warsan

Dhaid

Ras Al Khaimah

Shuweihat

To Salwa 400kV

Grid Station

(KSA)

Sharjah

Qidfa

Sila

Al Wasit Area

(Sultanate of Oman)

Ajman

New Fujairah

City

Taweela

New 400kV Tower (double circuit)

TRANSCO Tran

smiss

ion N

etwork

in

Abu D

habi

Emirate

Foah


Existing 220kV Tower (double circuit)

400kV OHL Tower (double circuit)

Generation Site


• ±170MW through the current existing Southern GCC 220kV interconnector between UAE-

Oman. Maximum transfers are planned to be increased to about ±1GW through the future

400kV interconnector between UAE-Oman.

• ±2GW through the current existing ENG interconnections to Northern Emirates (i.e. through

400kV interconnector between Taweela-Warsan, and 400kV interconnector between Fujairah

Qidfa-Sweihan) with possible range of exports.

These interconnections will not only enhance the security of supply but also reduce the spinning

reserve requirements and facilitate power exchange among member utilities and states, while

providing a mechanism to mitigate against gas supply shortages and uncertainty in the levels of

demand growth. It will also reduce plant procurement cost through achieving higher efficiency and

plant load factors apart from reducing the global operating costs of the integrated electricity

market.

c) Generation trends and energy storage

The production of electricity and the desalinated of water are dominated by large-scale operators

using conventional technologies such as gas turbines and thermal desalination. Figure 2-3 shows

the historical and future demand-generation trend upto 2030.

To support the Government objectives of achieving energy sufficiency, energy security, economic

diversification, and reduce the negative environmental impact of fossil fuel generation within the

Emirate, connection of essential new generation such as nuclear and renewable are planned which

have different technical characteristics to the current generation portfolio. Figure 2-4 shows the

existing and future potential generation site candidates and range of generation capacity assumed

at each of those sites.


Figure 2-3 Demand-generation trends for the period 2000-2030

The target of the Government’s objective is not to displace the existing or future fossil fuel plants,

but to supplement them with a diverse mix of technologies and fuel sources that make the

electricity sector less vulnerable to supply interruptions, market swings, and other crises while

creating the commercial impetus for the emergence of new technology-based clusters within the

local economy. This has required consideration of:

• Committed new generation expansion projects.

• ADWEC’s view on the future potential capacity and their potential site locations as outlined in

their 2011 Statement of Future Capacity Requirements.

• Closures of some existing generating plants due to various legislation and age profile.

• Policy drivers on renewable energy targets (objective is to drive towards establishing a 7%

share of renewable energy by 2020) and demand side management initiatives.

• Adequate generation resources to maintain sufficient reserve margin.

• ADWEA’s initiative to introduce energy storage.

-5.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 2026 2028 2030

Year

GW

Installed Gen Capacity (Existing) Committed Gen Capacity Proposed Gen Retirement 22.5GW Scenario

32.5GW Scenario 38.5GW Scenario 40.5GW Scenario


Figure 2-4 Existing and future potential generation site candidates

d) Technological developments

Technologies such as higher rating overhead line conductors for increased power transfers,

increased use of XLPE cables in areas of high amenity value at voltages up to 400kV, adoption of

765kV or HVDC transmission voltage levels and the application of static and dynamic reactive

power compensators, while not necessarily all these new technologies require considerations in the

transmission system development.

Elsewhere in the world, considerable attention is being paid to so-called “smart grids” to aid in

integrating renewable, changing customer requirements and renewing life expired assets. Whilst

not necessarily directly applicable to the UAE, some potential technologies such as the application

Shuweihat

Umn Al Nar/

SAS Al Nakheel

Masdar

Existing Fossil Fuel Power Plants

Future Potential Sites

Existing/Future Potential Renewables

Expected Retire

Gharbia (Western Region)

1) Shuweihat (S1, S2) – existing

2) Shuweihat S3 - open cycle

3) Braka (NPP-1)

4) North Braka (cogen/NPP)

5) Mirfa (Combined/cogen)

6) Madinat Zayed (Renewable)

7) Sir Baniyas Island (Renewable)

8) Sila (Renewable)

Eastern Region

1) Taweela/TANE (Existing)

2) Taweela-C (combined/cogen)

3) SASN/UAN (Existing)

4) UAN Re-development (open cycle)

5) Masdar City (Renewable)

Northern Emirates

1) Fujairah Qidfa (F1, F2) - Existing

2) Fujairah F3 (cogen/open cycle)

3) Ras Al Khaimah/Umn Al Quwain Border (cogen/NPP)

4) Hamria (cogen/open cycle)

Braka

Mirfa

Sir Baniyas Island

Madinat Zayed

North Braka

Fujairah Qidfa

Ras Al Khaimah

Taweela

SASN/UAN

Al-Ain Power Station

Sweihan

Sanaiya/Maziyad

Al-Ain Region

1) Al-Ain P.S (Renewable)

2) Sanaiya/Maziyad (Renewable)

3) Sweihan (Fossil fuel/Renewable)

Combination of generation

site candidates provides

~ 42.5GW capacity

Sila

40-100MW 50-200MW

100-700MW

0-500MW

0-700MW

100-350MW

0-350MW

4.65-6.75GW

1.65-2.43GW

4.89GW

0-5.6GW

5.6-11.2GW

2.97-4.27GW

0-5.6GW

0-3.6GW

Hamria

0-3.3GW

0-1GW


of smart meters in the selective areas of the distribution network within the Abu Dhabi Emirate

have been considered.

From a transmission perspective, the smart grid components could essentially include and integrate

synchrophasor measurement, intelligent protection schemes, power flow control, static var

compensation, real time monitoring, energy storage management and solar/wind forecasting tools,

advanced metering (AMR), demand response, energy storage devices, condition monitoring,

control and decision support systems. These requires massive changes in the electrical system and

the way it should be structured and operated, which has the potential to create a new system

architecture.

e) System operation and despatch

The generation mix and demand side technologies along with the changes expected in the load

duration curve due to high industrial demand growth and export requirements will required to be

considered. These are likely to alter the summer-winter peak demand ratio to about 40% and

system load factor to about 70% by 2020. The impact of these changes, particularly the need to

take into account the inter-relationship between power and water production, could lead to the

need to introduce other methods of water production such as reverse osmosis (RO) and

opportunities for energy storage. As a result the intermittency and non-despatchable plant

characteristics of wind and solar generation, and plans to despatch nuclear plant as base load

and/or introduce degree of flexibility in their operation needs to be considered.

f) Asset management

While the transmission network is comparatively young, there will be requirements for assets


Management process improvements will be required to capture the “knowledge to build only what

is needed”. Integrated outage management and risk assessment need to be considered for improved


programmed and managed innovatively to better position the transmission network for next 20

years of operation and maintenance; particularly noting the transmission network develops from

about 8.5GW to between 22.5GW-40.5GW. Certain of these can be managed by technologies

mentioned above. All these improvements will enable reduction in the utility costs (CAPEX and

OPEX) resulting in optimized asset utilization and efficient operation.


g) Standards and procedures

The evolution of bulk transmission network over the period to 2030 requires review of standards

and procedures related to the network operation and despatch that needs to address:

• System complexity as the network develops to meet the demand requirements of 2030.

• Operational connection topology to manage fault levels within acceptable limits.

• Levels of security (infeed risk), power factor, reactive power management, stability including

fault ride through and frequency response, and spinning reserve issues.

• Power quality requirements of customers and sensitive loads.

2.4 Approach to Developing the Main Bulk Transmission System


primarily driven by the demand and generation backgrounds and the resulting power transfers on

the transmission system. There are uncertainties associated with the demand and generation

backgrounds as with any forecasts and plans. These uncertainties will affect future planned power

transfers on the transmission system and hence the way the transmission system develops.

To manage the uncertainties, the approach adopted in this strategy is based on the “scenario

analysis” taking into account the sensitivities, constraints and risks through considering:

• Different demand forecast scenarios in the range 22.5GW-40.5GW by 2030.

• Considering different locational development of demand including different levels of transfers

to the Northern Emirates.

• Different locational development of generation to meet the above demands.

Using the scenarios developed, the planned power transfers on the transmission system are

established for various demand-generation scenarios. Given the differences in scenarios, envelopes

of possible transfers are established. The scenario analysis establishes the most likely (best-view)

planned power transfers across each of the identified transmission corridors that is used as a basis

to inform how best to develop the transmission system. Figure 2-5 shows a representative example

of how the envelope of power transfers and the most likely (best view) planned transfers is

established across the West-East boundary corridor.


Figure 2-5 Representative example of most likely boundary transfers across West-East corridor

Figure 2-6 shows the envelope of possible transfers and the best-view planned transfers across the




Gharbia-Eastern Region boundary

0

2000

4000

6000

8000

10000

12000

14000

16000

2010 2015 2020 2025 2030

Year

MW

Most likely transfers used to establish

requirements for network development


Figure 2-6 Envelope of possible transfers and best-view planned transfers by 2030

Bulk transmission system options centred on 400kV, 765kV and HVDC technologies have been

explored to meet the system needs for the range of planned transfer requirements. Figure 2-7

shows the three options which are investigated for the main bulk transmission system

development. Analysis was performed for the transmission system options for various demand

generation backgrounds in order to identify the most efficient long-term transmission system

option.

-2,000

-1,000

0

1,000

2,000

3,000

4,000

5,000

6,000

2010 2015 2020 2025 2030

Bou

nda

ry T

rans

fers

(M

W)

~8GW

(~1.8GW)

~5GW

(~2.2GW)

~3.5GW

(~2GW)

~1.5GW

(~3.2GW)

~2GW

(~0.3GW)

Best-view planned transfers in 2030

Gharbia region

Northern Emirates

Abu Dhabi

Islands’

Eastern region

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

2010 2015 2020 2025 2030

Bo

unda

ry T

rans

fers

(M

W)

0

1,000

2,000

3,000

4,000

5,000

2010 2015 2020 2025 2030

Bou

nda

ry T

ran

sfer

s (M

W)

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

2010 2015 2020 2025 2030

Bou

nda

ry T

ran

sfer

s (M

W)

-4,000

-3,000

-2,000

-1,000

0

1,000

2,000

3,000

4,000

5,000

2010 2015 2020 2025 2030

Bou

nda

ry T

ran

sfer

s (M

W)

-2,000

-1,000

0

1,000

2,000

3,000

4,000

5,000

6,000

2010 2015 2020 2025 2030

Bou

ndar

y T

rans

fers

(M

W)

Transfer capability in 2010


Figure 2-7 Main options for bulk transmission system development.

400kV is chosen as the most likely transmission system option to ensure that the investments are

economical and efficient and that those Users connecting to the system can reasonably identify and

evaluate opportunities. As there will continue to be a degree of uncertainty in the realization of the

volume, location and timing of demand and generation backgrounds in any given area, it is

proposed to continue monitor the developments of the market and update the scenarios

accordingly. Hence, the potential transmission reinforcement plans shall be established in a phased

manner and that the options are maintained at minimum cost to provide a least regret solution.

It should be noted that the 400kV transmission reinforcements associated with the 1st and 2nd Braka

nuclear units are able to exploit the synergies with the committed transmission network associated

with Shuweihat S3 generation integration. Migration to 765kVAC or HVDC as the main overlay

transmission system option over the existing 400kV network across the West-East corridor is

convincing only if significant future generation is introduced in the Western region and that the

Abu Dhabi has increased obligations to meet the demand requirements in Northern Emirates to

achieve transmission distance of about 400km or more. This requires the levels of transfers across

the West-East corridor to be equal to or greater than 12GW which could be achieved for outlier

38.5GW demand scenario.


In developing the transmission system, considerations have also been given to the increasing

requirements for renewal of existing assets in the period to 2030.

2.5 Network Development Strategy

TRANSCO’s network development strategy is to continue to develop a flexible, reliable, secure,

accessible, robust, economical, efficient, environmentally friendly and safe transmission system

that meets the needs of its customers in a manner consistent with its Licence obligations.

This is achieved through:

• Implementing a structured asset management process that takes cognizance of best practice

asset management principles for the development and stewardship of the transmission network

and requirements for capital assurance governance.

• Continuing with the development of 400kV main bulk transmission system. Given the

uncertainty in the demand and generation background, the possible need to migrate to 765kV

or HVDC as the main overlay transmission system option across the West-East corridor is to

be kept under review, particularly if significant level of additional generation capacity beyond

Shuweihat S3 and Braka nuclear plant are contracted in the Western region, and that there is

increased requirement to provide power to Northern Emirates.

• Incremental deployment and integration of new technologies and best available practice.

It is intended that the development of the transmission network will be done in such a manner to:

• Have minimum negative side-effects on the environment and society.

• Accommodate large central and decentralized generation and storage.

• Enable active participation of consumers including demand response.

• Provide high quality of supply and reliable power that satisfy the expectation and needs of the

customer and comply with international best practice and standards.

• Optimize asset utilization and operate efficiently through integrated outage management, risk

assessment, improved process, resource management and use of technology and decision

support tools.

• Anticipate and respond to system disturbances.

• Operate resiliently under unforeseen events.


Figure 2-8 shows the expected 400kV transmission system configuration by 2030.

Figure 2-8 Expected 400kV transmission system configuration by 2030.


Al-Ain

South West

Dahma

Sweihan

Mussafah

Shahama

Warsan

Dhaid

Ras Al

Khaimah

To Salwa 400kV

Grid Station

(KSA)

Sharjah

SASN

Taweelah

Qidfa

Sila

ICAD

MahawiBahia

Al Wasit Area


Hameem

Al-Ain Airport

Ajman

New Fujairah

City

Mirfa

Wathba

SAS Al Nakheel

Beach

Al Qurm

ADST

ReemSadiyat

Bahia

Zayed

Sports City

Braka

400kV grid station

400kV Tower

(double circuit)

400kV Cable

Single CircuitSingle 400kV



Madinat Zayed

Bab

ChemaWEyaat

Shuweihat

Ruwais


3.0 Planning Principles

The Electricity Transmission System Security Standard, Issue 1, Rev (0) dated March 2005 sets

out the criteria and methodology, which TRANSCO shall use in the planning, development,

operation and maintenance of the electricity transmission system. The Electricity Transmission

Code (Ver.1, Rev.3, issued in September 2006) contains additional criteria and other aspects of

quality of supply standards that shall be considered for planning the transmission network. A

summary of the planning principles are discussed below;

3.1 General Criteria

The following general criteria are adopted for network planning and development;

• Electricity transmission system shall be planned to comply with N-1 criteria.

• 400kV overhead line system feeding Abu Dhabi Island shall comply with N-2.

• Electrical and thermal ratings of the equipment shall NOT be exceeded.

• Power system shall remain stable with respect to voltage and frequency control under

normal and secured outage conditions.

• Power system shall be developed in an efficient and economical manner.

• Acceptable safety standards shall be maintained.

Both the Electricity Transmission System Security of Supply Standard and the Electricity

Transmission Code are under review. However, for the purposes of this Seven Year Electricity

Planning Statement, 400kV overhead line circuits planned to be connected to Nuclear Power

Station shall meet “N-Tower” criteria (i.e. for tower failure).

3.2 Connection Conditions

TRANSCO and Users connected to the Transmission System (Gencos, Discos and Non-Embedded

Customers) have obligations to plan and operate their networks so that minimum performance

criteria are met. The connection conditions related to frequency deviation, voltage variation,

harmonic distortion, phase unbalance, voltage fluctuations; demand power factor shall be

considered as specified in the Electricity Transmission Code. The design of generation


connections, main interconnected transmission topology and demand connections shall satisfy the

deterministic criteria specified in the Security Standards.

Frequency Deviation

The System Frequency of the Transmission System shall be nominal 50Hz with System Frequency

set points between 49.95Hz – 50.05Hz and shall be controlled within the limits of 49.9Hz –

50.1Hz unless exceptional circumstances prevail.

Under transient disturbed conditions, System Frequency could rise to 53Hz or fall to 47Hz.

However, under disturbed steady-state conditions, System Frequency will NOT exceed 51.5Hz or

fall below 48.5Hz.

Voltage Variation

The voltage on the 400kV, 220kV and 132kV parts of the Transmission System at each

Connection Site with the User will normally remain within ± 5% of the nominal value. The

minimum voltage is -10% and the maximum voltage are +10%; but voltages between +5% and

+10% will not last longer than 15 minutes unless abnormal conditions prevail.

The voltage on the 33kV and 11kV parts of the Distribution System will normally remain within ±

6% of the nominal value unless abnormal conditions prevail.

Harmonic Distortion

The Compatibility/Planning Levels for harmonic distortion on the Transmission System from all

sources under both Planned Outage and fault outage conditions (unless abnormal conditions

prevail) shall comply with the levels shown in Appendix-F of the Electricity Transmission Code.

TRANSCO apply the Planning Levels to the connection of non-linear loads to the Transmission

System, which may result in harmonic emission limits being specified in the relevant Connection

Agreement. The Total Harmonic Distortion (THD) for Planning and Compatibility Levels shall not

exceed the limits shown in the Table 3-1 below;

Table 3-1 Planning Levels for Total Harmonic Distortion

Total Harmonic Distortion (THD) Level S.N Description

132kV 220kV & 400kV

1 Planning Levels for Harmonic Voltage 3% 3%

2 Harmonic Voltage Compatibility Levels 5% 3.5%


Phase Unbalance

Under Planned Outage conditions, the maximum negative phase sequence component of the phase

voltage on the Transmission System should remain below 1% unless abnormal conditions prevail.

Voltage Fluctuations

Voltage fluctuations at a Point of Common Coupling (PCC) with a fluctuating Load directly

connected to the Transmission System shall NOT exceed;

• 1% of voltage level for step changes which may occur repetitively. Any large voltage

excursions other than step changes may be allowed up to 3% provided this does not

constitute a risk to the Transmission System or in TRANSCO’s view to the System of any

User.

• Flicker Severity (Short Term) of 0.8 Unit and a Flicker Severity (Long Term) of 0.6 Unit,

as set out in IEC 61000-3-7 Standard.

Demand Power Factor

Demand power factor shall NOT be less than 0.91 lag at 33kV and 11kV connection points

between TRANSCO and Distribution Companies.

3.3 Generation Connection Criteria

The generation connections shall satisfy deterministic criteria comprising of the following;

a) Criteria which determine the maximum Normal and Infrequent Infeed Loss Risk for a set of

“Secured Events”.

For network design and planning purposes the level of these limits are 400MW and 800MW

respectively. These limits are currently under review and expected to be increased to take into

account the changes in the power network e.g. interconnection with ENG/GCC and Nuclear Plants.

The review will be undertaken after validating and updating the plant’s dynamic models (governor,

exciter, PSS models). The Normal Infeed Loss Risk limit aims to ensure that the system frequency

does not deviate by more than 0.5Hz for “Secured Events” such as busbar fault outage or single

generation circuit outage. However, the “Infrequent Loss of Power Infeed” risk aims to avoid

deviation of system frequency outside the range 49.5Hz to 50.5Hz for more than 60 seconds.


b) Criteria which determine “Transmission Capacity” require avoiding un-acceptable network

conditions for a set of “Secured Events”.

In either case, prior to any fault or Secured Events, the “Transmission Capacity” for the

connection to the Power Station should be planned such that the following conditions shall NOT

prevail;

• Loss of Supply Capacity (valid only for the Secured Event of fault outage except as

permitted by the Demand Connection Criteria).

• Primary equipment loading exceeding normal rating.

• Voltage outside the pre-fault planning voltage limits or insufficient voltage performance

margins; or

• System instability.

Secured Events could be a fault outage of a single transmission circuit or reactive element, outage

of busbar section or outage of a single transmission circuit with planned outage of another

transmission circuit, a Generating Unit or reactive element.

3.4 Main Interconnected Transmission System (MITS) criteria

The Minimum Transmission Capacity requirements for the Main Interconnected Transmission

System (MITS) shall satisfy deterministic criteria and shall be planned such that prior to any fault

or Secured Events, the following conditions shall NOT prevail;

• Loss of Supply Capacity (valid only for Secured Event of fault outage except as permitted by

the Demand Connection Criteria).

• Primary equipment loading exceeding normal rating.

• Voltage outside the pre-fault planning voltage limits or insufficient voltage performance

margins; or

• System instability.

Secured Events could be a fault outage of a single transmission circuit or reactive element, outage

of busbar section or outage of double circuit 400kV overhead line feeding Abu Dhabi Island, or

outage of any single transmission circuit with planned outage of another transmission circuit, a

Generating Unit or reactive element.


3.5 Demand Connection Criteria

The planning of demand connections (132/11kV substations or 220/33kV substations) to the

transmission system shall satisfy deterministic criteria and there should be NO loss of supply

capacity for the Group Demand following Secured Events as illustrated in Table 3-2.

Table 3-2 Planning supply capacity following Secured Events

Initial System Conditions Group Demand

(MW) Intact System With Single Arranged Outage

Over 150MW Immediately [1]

Group Demand

Immediately [1]

Maintenance Period Demand

27MW-150MW Immediately [1]

Group Demand

5 minutes [2]

Maintenance Period Demand

Up to 27MW Subject to Discos system security criteria Subject to Discos system security criteria

Notes:

[1] Loss of supply not exceeding 5 minutes may be acceptable if leads to significant economies.

[2] For sites where economies prohibit the provision of a third Transmission Circuit, the

Maintenance Group Demand may be lost for the necessary time to restore outage.

Secured Events could be a fault outage of a single transmission circuit under Intact System; or

outage of a single transmission circuit with planned outage of another transmission circuit, a

Generating Unit or reactive element.

Maintenance Period is the period of the Year (November to April) during which maintenance of

transmission equipment is normally undertaken. Maintenance Period Demand is the demand level

experienced at a Demand Supply Point and is the maximum demand level expected during the

normal maintenance period. Unless better data is available, this should be 50% of the Group

Demand.


4.0 Demand-Generation Background

The Sector Law requires ADWEC to prepare a demand forecast and accordingly secure the future

generation capacity to meet the short and long-term requirements of the Sector. The requirement

for the transmission system development and its associated investments is primarily driven by the

demand and generation backgrounds. In this chapter, the demand-generation trends and the choice

of the key assumptions are summarized. Based on the electrical connectivity and geographical

dispersion, the capacity and demand forecast at each part of the transmission network are

highlighted.

4.1 Demand Background

In 2010 the total system peak demand recorded was about 8.5GW, which included supplies to the

Abu Dhabi Emirate and the Northern Emirates. Historically, the electricity peak demand sustained

an average growth of 9.8% for the period 2000-2010. The average peak demand growth for the

Abu Dhabi Emirate was 7.8% for the same period. In 2006 TRANSCO established interconnection

with Emirates National Grid (ENG) with the intention of supporting the member utilities of the

UAE.

Global peak electricity demand (include supplies to Abu Dhabi Emirate and Northern Emirates) is

forecast to increase to between 16GW and 24GW by 2018 according to ADWEC’s 2011 forecast

update. This represents an average growth rate of about 9% and 16% per annum for the period

2010-2018 related to the two demand forecasts. For the purpose of preparing this 7YPS an

intermediate demand level of about 20GW by 2018 is also considered. This together with the

generation background described in the next Section is consistent with the “best-view” long-term

transfers established in the network development strategy.

In developing the demand forecast, the updated Users demand forecast data, demand notifications

from mega residential/ commercial project developers, bulk industrial consumers demand data,

population growth, economic activity and export requirements are captured based on ADWEC’s

analysis. The demand scenarios are used to indicate the uncertainty and market volatility in the

forecast.


The principle demand drivers are industrial, residential and commercial development expansions;

and export supplies to Northern Emirates. The proportion of industrial demand relative to peak

demand is forecast to increase as the UAE diversifies its economy and there is the potential for

variations of the locational development of demand within the outlier demand scenario.

The 7YPS looks at 16GW, 20GW intermediate and 24GW demand scenarios. Attachment-A

include detailed summary and area-wise/zone-wise demand forecast for the 16GW, 20GW

intermediate and 24GW demand scenarios; expected capacity and peak demand forecast at the exit

demand supply points for the period 2010-2018.

Attachment-A includes summary of region-wise peak demand forecast for 16GW, 20GW

intermediate and 24GW demand scenario (Table-A1). Area-wise/zone-wise detailed demand

forecast for the three demand scenarios is included in Table A2. The expected capacity and peak

demand forecast at the exit demand supply points in Abu Dhabi Emirate for the period 2010-2018

for 16GW and 24GW demand scenario is included in Table-A3 and Table-A4 respectively.

For the 20GW intermediate scenario, the global peak electricity demand (Abu Dhabi Emirate and

Northern Emirates) is expected to reach about 20GW in 2018 representing an average growth rate

of about 13% for the period 2010-2018. Figure 4-1 shows the region-wise demand forecast for the

20GW intermediate scenario. Table 4-1 shows the detailed break-up of region-wise demand

forecast for the 20GW intermediate scenario.

The expected capacity and peak demand forecast at the exit demand supply points in Abu Dhabi

Emirate for the period 2010-2018 for 20GW demand scenario is included in the Attachment (refer

Table-A6).

The expected capacity and peak demand forecast at the 400kV grid supply points in Northern

Emirates for the period 2010-2018 for 20GW demand scenario is included in the Attachment (refer

Table-A7).


Figure 4-1 Region-wise demand forecast for 20GW intermediate scenario.

8,485

9,845

11,167

13,436

14,730

16,85117,582

18,783

20,046

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

20,000

22,000

24,000

2010 2011 2012 2013 2014 2015 2016 2017 2018

Year

Pea

k D

eman

d (M

W)

Abu Dhabi Islands' Eastern Region

Gharbia (Western) Region Al-Ain Region

Northern Emirates Incl. Water Pump & Aux. Loads Auxiliary & Desalination Process Loads in AD Emirate

Transmission Losses Coincident Total System Peak

Growth Rate (2010-2018)

System (AD+NE) = 13.1%; Abu Dhabi Emirate = 11.9%

Abu Dhabi Islands' = 7.8%; Eastern Region = 15.7%

Gharbia Region = 24.4%; Al-Ain Region = 6.3%


Table 4-1 Region-wise demand forecast for the 20GW intermediate scenario.

a) Demand developments in Northern Emirates

The supply requirements of the Northern Emirate are expected to exceed 2.5GW in the short-term

and could possibly reach about 5GW by 2018. Existing and on-going main bulk 400kV

transmission development works in Northern Emirates (in Fujairah, Ajman, Sharjah) will enable

securing the above supplies and meet the rise in electricity demand in the regions. These

development works will not only contribute to the Abu Dhabi’s continued support to the energy

requirements of the Northern Emirates but also will improve the overall security of the ENG grid

and reduce the risk to the TRANSCO of shortages and/or network security issues in the Northern

Emirates.

2010 2011 2012 2013 2014 2015 2016 2017 2018

1,789 1,981 2,086 2,239 2,359 2,472 2,657 2,835 3,031

1,814 2,129 2,547 2,811 3,136 3,968 4,195 4,530 5,028

658 1,031 1,247 1,710 2,289 2,765 2,840 2,980 3,030

1,648 1,835 2,000 2,094 2,182 2,249 2,350 2,421 2,522

5,909 6,976 7,879 8,854 9,966 11,454 12,041 12,765 13,611

757 780 780 780 815 940 940 990 1,075

6,666 7,756 8,659 9,634 10,781 12,394 12,981 13,755 14,686

1,445 1,700 2,100 3,324 3,420 3,790 3,899 4,236 4,480

270 285 285 323 335 450 450 450 450

1,715 1,985 2,385 3,647 3,755 4,240 4,349 4,686 4,930

104 104 123 155 194 217 252 342 430

8,485 9,845 11,167 13,436 14,730 16,851 17,582 18,783 20,046

Total - Northern Emirates (MW)

Total -Abu Dhabi Emirate (MW)

A) Abu Dhabi Emirate

Aux & Desal Loads in Abu Dhabi Emirate (MW)

2) Water pumping & Aux Loads in N.E (MW)

B) Northern Emirates

1) Abu Dhabi Islands

Grand Total (MW)

C) Estimated Transmission Losses (MW)

1) Northern Emirates (MW)

Sub-Total1 (MW)

Description/Region

2) Eastern Region

3) Gharbia (Western) Region

4) Al-Ain Region


b) Demand developments in Industrial Zones

Expansion of the oil and gas sector and their increasing reliance upon the utility grid for its

electricity requirements has directly attributed to the significant demand growth in the Gharbia

(Western) region. The growth of oil and gas sector has significant long-term macro-economic

impact on the economy of Abu Dhabi Emirate. The supply requirements of all Abu Dhabi National

Oil Company (ADNOC) group projects located in the Gharbia region is expected to exceed

2GW by 2018.

Development of heavy industrial zones is another important driver contributing to the significant

demand growth. These include developments of the Mussafah Steel Plant in Mussafah/ICAD-1

area, Industrial City of Abu Dhabi (ICAD) in ICAD area, Khalifa Port and Industrial Zone (KPIZ)

in the Taweela area, and ChemaWEyaat’s Chemical Industrial City in the RUWAIS area. The

supply requirements of these industrial zones and other light industries in Abu Dhabi Emirate are

expected to exceed 1.5GW by 2018.

For the TRANSCO’s best-view planned transfers, the cumulative demand requirements of

ADNOC group projects, heavy and light industrial demand categories is expected to reach about

4.4GW which represents about 22% of the total electricity demand by 2018. The existing and on-

going transmission development works in RUWAIS, BAB, SHAH/ASAB, and ICAD among other

sites is expected to secure the above supplies to meet the short and long-term requirements in the

respective regions.

c) Demand developments in Abu Dhabi Islands’, Eastern and Al-Ain regions

New residential and commercial developments in Abu Dhabi islands’ and Eastern region; and

developments in Al-Ain region are expected to contribute to the cumulative electricity demand

growth of Abu Dhabi Emirate within next few years. The existing and planned transmission

development works are expected to secure the supplies in the above regions.

The developments in Abu Dhabi islands’ are concentrated in Abu Dhabi island, Reem island,

Suwa island, Sadiyat island. For the TRANSCO’s best-view planned transfers, the cumulative

demand requirement of Abu Dhabi islands’ is expected to reach about 3GW which represents

about 15% of the total electricity demand by 2018.


The residential and commercial developments in Eastern region are concentrated in Yas island,

Raha Beach, Bahia, Mahawi, and Shamkha regions. For the TRANSCO’s best-view planned

transfers, the cumulative demand requirement of Eastern region (excluding industrial demand

category) is expected to reach about 2.8GW which represents about 14% of the total electricity

demand by 2018.

The developments in Al-Ain region are concentrated in Sweihan, Dahma, and Al-Ain South West

zones. For the TRANSCO’s best-view planned transfers, the cumulative demand requirement of

Al-Ain region is expected to reach about 2.5GW which represents about 12.5% of the total

electricity demand by 2018.

4.2 Generation Background

The production of electricity and the desalinated water are dominated by the large-scale operators

using conventional technologies such as gas turbines and thermal desalination. To meet the above-

mentioned demand background, the existing power generation plants contribute about 12GW (as

on 2010) of capacity. The following are the major new committed generation projects identified to

date which are expected to be integrated into the main bulk transmission grid during the period

2011-2020:

• Shuweihat S2 (~1.62GW) and Shuweihat S3 (~1.65GW) combined cycle fossil fuel plants

located adjacent to the existing Shuweihat S1 site in the Al Gharbia region.

Shuweihat S2 is integrated to transmission network and operational in 2011.

• The Braka site in the Gharbia region has been identified to promote nuclear generation of total

capacity 5.6GW by 2020. Generator units of 1400MWe are expected to be integrated to the


A number of committed renewable generation projects have also been identified to date and these

are expected to be integrated into the 220kV transmission network. These include:

• Shams-1 concentrated solar power (CSP) plant with a maximum installed capacity of 110MW

at a facility located south of Madinat Zayed in the Gharbia region.

• Nour-1 photovoltaic solar power (PV) plant with a maximum installed capacity of 100MW at a

potential facility in Al-Ain region.


The above generation projects contribute an additional capacity of about 9.5GW by 2020, among

other potential new generation additions (e.g. relocation of Al Zawra gas turbines to Mirfa site,

Masdar hydrogen plant at Shuweihat).

To satisfy the emerging gap between the demand and generation outlook, and ensure sufficient

generation margin is available from 2013, following assumptions have been considered in line

with the 2011 ADWEC Statement of Future Capacity Requirements:

• Procuring IWPP peak capacity in excess of PWPA contracted capacity to the extent of about

200MW for the period 2013-2016.

• Availability of FEWA reserve stand-by capacity to the extent of about 700MW for the period

2013-2016.

It should be recognized that the actual commitment to the new conventional generation capacity

takes place on a shorter time scale (about 4 years) to close the emerging gap. Figure 4-2 shows the

demand-generation background for the period 2010-2018. Attachment-A (Table-A8) includes the

detailed summary of generation capacity expansion plan assumed for the TRANSCO’s best-view

planned transfers for the period 2010-2018.

Figure 4-2 Demand-generation background for the period 2010-2018.

0

5

10

15

20

25

30

2010 2011 2012 2013 2014 2015 2016 2017 2018

Year

GW

Installed Gen Capacity (Existing) Committed Gen Capacity 22.5GW Scenario (16GW by 2018)

32.5GW Scenario (18.5GW by 2018) 20GW Intermediate Scenario (20GW by 2018) 38.5GW Scenario (24GW by 2018)

Global demand growth rate (2010-2018)



20GW Intermediate scenario = 13.1%



To meet the TRANSCO’s best view planned transfers after Shuweihat S3 generation; there is a

need to integrate an additional major new generation into the transmission system from 2015. In

addition to Taweela-C option (in Eastern region), there are two other potential generation sites





between the identified generation capacity and the required generation capacity upto 2020. 400kV

transmission reinforcement is required across Shamkha-Sweihan corridor common for all the three

potential generation site options in addition to the generation integration works required at their

respective generation sites. For the potential generation site option at Mirfa (in Gharbia region)

only, major 400kV transmission reinforcement is required within the Gharbia region and across the

West-East corridor to evacuate power generation from the Gharbia region.

Some of the existing generation plants are expected to retire during the period 2017-2020. These

are located at Mirfa (186MW), Umn Al Nar (778MW), Al-Ain Power Station (256MW) and

Madinat Zayed Power Station (109MW). The available capacity off-set due to the closure of above

existing generation will be about 1.3GW by 2020. To compensate for the expected generation

retirements, there could be a possibility to locate some new generation capacity (of the order of

1GW) either by re-developing the existing Umn Al Nar (UAN) plant site (in Eastern region close

to Abu Dhabi Island) or locate some new generation capacity close to Sweihan (in Al-Ain region).

In either case, no major 400kV transmission reinforcement works are required as the

existing/planned main bulk transmission infrastructure by 2020 in UAN and Sweihan has

sufficient transmission capability to evacuate the above generation.

Attachment-F includes a brief description of major existing generation plants and planned

committed generation projects.


5.0 Planned Transfers


primarily driven by the demand and generation backgrounds and the resulting power transfers on

the transmission system. There are uncertainties associated with the demand and generation

backgrounds as with any forecasts and plans. These uncertainties will affect future planned power

transfers on the transmission system and hence the way the transmission system develops. Using

the scenarios developed, the planned power transfers on the transmission system are established

for the most probable demand-generation scenarios envisaged during the period 2010-2018 and

ensure consistency with the long-term approach. Envelopes of possible transfers are established

and the most likely (best-view) planned power transfers are identified across each of the

transmission corridors that is used as a basis to inform how best to develop the transmission

system. The approach adopted in the 7YPS in establishing the envelope of possible transfers and

planned transfers taking into account the following considerations:

• Different demand forecast scenarios namely 22.5GW scenario (i.e. 16GW by 2018),

intermediate scenario (i.e. 20GW by 2018) and 38.5GW scenario (i.e. 24GW by 2018).

• Different locational development of next possible generation (Mirfa, Taweela-C, Hamria) to

meet the above demands from 2014/2015 through to 2018 after Shuweihat S3 generation.

Figure 5-1 shows the envelope of possible transfers and the best-view planned transfers across the




The main features of the fan diagrams across the five identified boundary corridors are:

a) The transfers across the Gharbia-Eastern region corridor are the sum of the transfers from the

Gharbia region to the Eastern region and from the Gharbia region to Al-Ain region. During the

period 2010-2018, the most likely demand in the Gharbia region is expected to increase from

0.8GW to about 3.1GW mainly attributed to the industrial growth. The scheduled generation in

the region is assumed to rise significantly from 1.5GW to about 8.4GW due to high volumes of

new generation seeking connection in the area. Consequently, the best-view planned transfer

across this boundary is expected to reach about 5GW by 2018.


Figure 5-1 Envelope of possible transfers and best-view planned transfers for period 2010-2018

b) The transfers across the Northern Emirates-other regions corridor are the sum of the transfers

from the Northern Emirates to the Eastern region and from the Northern Emirates to Al-Ain

region. During the period 2010-2018, the most likely demand in the Northern Emirates is

expected to increase from 1.5GW to about 5GW. The scheduled generation in the region is

assumed to rise significantly from 1.7GW to about 3GW. Consequently, the best-view planned

transfer across this boundary is expected to reach about 2GW by 2018.

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c) The transfers across the Eastern region-other regions include transfers from the Eastern region

to Abu Dhabi Islands, plus Eastern region to Al-Ain region, minus Gharbia region to Eastern

region, minus Northern Emirates to Eastern region. During the period 2010-2018, the most

likely demand in the Eastern region is expected to increase from 2.5GW to about 6GW. The

scheduled generation in the region is assumed to rise significantly from 5GW to about 8GW.

Consequently, the best-view planned transfer across this boundary is expected to increase to

2GW in 2018.

d) The transfers to the Abu Dhabi Islands’ are from the Eastern region. The Abu Dhabi Islands’

region constitutes Abu Dhabi Island, Reem, Suwa and Sadiyat Islands. During the period 2010-

2018, the most likely demand in the Abu Dhabi Islands is expected to increase from 1.7GW to

about 3GW. There is no generation in this region. Hence, the best-view planned transfer across

this boundary is expected to meet the demands in the region.

e) The transfers to the Al-Ain region are from other regions namely from the Eastern and Gharbia

regions and Northern Emirates. During the period 2010-2018, the most likely demand in the

Al-Ain region is expected to increase from 1.6GW to about 2.5GW. The scheduled generation

in the region is assumed to rise from about 0.25GW to about 0.4GW. Consequently, the best-

view planned transfer across this boundary is expected to be about 2GW.


6.0 Evolution and Performance of Transmission Network This chapter presents the evolution of 400kV, 220kV and 132kV transmission system within the

Emirate of Abu Dhabi and, where appropriate, TRANSCO network outside of the authorized area

up to 2018. A brief description of its impact on the transmission system performance and network

management issues are presented.

6.1 Evolution of Transmission Network

The evolution of the transmission network is based on the best-view planned transfers. The

evolution of the main bulk transmission network is consistent with the long-term network

development strategy. Figure 6-1 shows the existing TRANSCO main bulk 400kV transmission

network (as on end 2010) spread across the five regions (Gharbia region, Eastern region, Abu

Dhabi Islands’, Al-Ain region and Northern Emirates).

Figure 6-1 TRANSCO existing main bulk 400kV transmission network (as on end 2010).


Al-Ain South West

Dahma

Sweihan

Mussafah

Shahama

Warsan

Dhaid

Ras Al Khaimah

Madinat Zayed

Shuweihat

Qidfa

SAS Al Nakheel

Beach

Al Qurm

ADST

Reem

Sadiyat

SASN

Taweela

400kV grid station

New 400kV grid station

400kV Tower

(double circuit)

New 400kV Tower

(double circuit)

400kV Cable

Single Circuit

New 400kV Cable

Single Circuit

Single 400kV


400kV grid station associated with the Power Plant

To Abu Dhabi Islands’


Attachment-B (Figure-B1 to Figure-B16) shows the detailed 400kV, 220kV and 132kV

transmission network diagrams that include the existing, current on-going projects and new

planned projects for the period 2011-2018 for the best-view planned transfers. It should be noted

that the reference date for inclusion of any new asset expected to be integrated into the

transmission network is the summer peak of the respective year. Accordingly, the network diagram

shows those assets included in that year. However, if any asset is expected to commission and

integrated into the transmission network later after the summer peak of that year is included in the

network diagram shown in the following year.

2011-2015

Major committed 400kV transmission system expansion projects are expected to be completed

during the period 2011-2015 to meet the system needs and to accommodate committed new

generation projects.

The 400kV transmission facilities from the existing Shuweihat Power Station is capable of

evacuating power from both Shuweihat S1 & S2 generation (total about 3.2GW) to meet the

demand requirements in the Gharbia region and exports to the Abu Dhabi Region. To evacuate

power generation from the committed Shuweihat S3 generation (about 1.65GW), a new 400kV

grid station is planned within the Shuweihat S3 plant site. A new 400kV grid station is also

planned at Braka in 2015 to facilitate the integration of the nuclear power plant in 2017/2018. The

400kV West-East corridor reinforcements ensure an integrated approach to evacuating power from

S3 and Braka while meeting demands in the Western region.

New 400kV grid stations and related 400kV overhead line works are expected to be integrated to

the transmission network to meet the respective regions’ demand requirements. These are

400/220kV grid stations in Ruwais and Bab (in Gharbia region); 400/220kV grid station in ICAD

and 400/132kV grid stations in Bahia, Mahawi and Shamkha regions (in Eastern region); and

400/132kV grid stations in Ajman, Sharjah and New Fujairah City (in Northern Emirates).

A new 400kV grid station and related 400kV overhead line works at Sila has been completed in

2011 as part of the UAE plan to integrate with the GCC grid. A new 400kV grid station and related

400kV overhead line works are planned to facilitate increased interconnection with Oman grid.


400kV XLPE underground cables’ projects along the Abu Dhabi Island-Sadiyat-Bahia corridor

and Sas Al Nakheel-Mahawi-Mussafah corridor have been initiated to enable the policy decision to

dismantle the 400kV overhead lines along the said corridor.

In the Attachment-B, figures-B1 to B5 (400kV & 220kV network) and figures B9 to B13 (132kV

network) show the evolution of transmission network for the period 2011-2015 for the best-view

planned transfers.

Figure 6-2 shows the expected 400kV transmission network configuration by 2015 to meet the best

view planned transfers. The configuration assumes Taweela-C (in Eastern region) in 2015 as the

next new potential generation site after Shuweihat S3 generation.

Figure 6-2 Expected main bulk 400kV transmission network configuration by 2015.


Al-Ain

South West

Dahma

Sweihan

Mussafah

Shahama

Warsan

Dhaid

Ras Al Khaimah

Ajman

Madinat Zayed

Shuweihat

New

Fujairah City

To Salwa 400kV Grid

Station (KSA)

Sharjah Qidfa

SilaRuwais

Bab

ICAD

Mahawi

Bahia Al Wasit Area


SAS Al Nakheel

Beach

Al Qurm

ADST

Reem

Sadiyat

Bahia

SASN

Taweelah

400kV Grid Station

New 400kV Grid Station

400kV Tower

(double circuit)

New 400kV Tower

(double circuit)

400kV Cable

Single Circuit

New 400kV Cable

Single Circuit

Single 400kV


Power Plant

Braka


To meet the TRANSCO’s best view planned transfers, after Shuweihat S3 generation; there is a

need to integrate an additional major new generation into the transmission system from 2015. In

addition to Taweela-C option (in Eastern region), there are two other potential generation sites





between the identified generation capacity and the required generation capacity upto 2020.

Figure 6-3 shows the sensitivity of these alternate generation sites on the expected 400kV network

configuration in 2015.

Figure 6-3 Sensitivity of generation site options on transmission network in 2015.


Al-Ain

South West

Dahma

Sweihan

Mussafah

Shahama

Warsan

Dhaid

Ras Al Khaimah

Ajman

Madinat Zayed

Shuweihat

New

Fujairah City

To Salwa 400kV Grid

Station (KSA)

Sharjah Qidfa

SilaRuwais

Bab

ICAD

Mahawi

Bahia Al Wasit Area


SAS Al Nakheel

Beach

Al Qurm

ADST

Reem

Sadiyat

Bahia

SASN

Taweela- P.S

Taweela-C generation option

Braka

TANE

Hamria generation option

Mirfa generation option

400kV Grid Station

New 400kV Grid Station

400kV Tower

(double circuit)

New 400kV Tower (double circuit) for Taweela-C/Hamria generation option

400kV Cable

Single Circuit

Single 400kV


Power Plant

New 400kV Tower (double circuit) for Mirfa generation option

Common works required

for all three generation

site options


As shown in Figure 6-3, 400kV transmission reinforcement is required across Shamkha-Sweihan

corridor which is common for all the three potential generation site options in addition to the

generation integration works required at their respective generation sites. Only for the potential

generation site option at Mirfa (in Gharbia region), major 400kV transmission reinforcement is

required within the Gharbia region and across the West-East corridor to evacuate power generation

from the Gharbia region. If the next potential generation site is located along the coast-line in Ras

Al Khaimah (in Northern Emirates), the only difference is in the generation integration works

between the Hamria and Ras Al Khaimah option; and that there would be a requirement for the

reinforcement of the existing 400kV grid station at Ras Al Khaimah and related 400kV OHL

works terminating to the grid station.

2016-2018

Major 400kV transmission reinforcement’s works are required within Western region and across

West-East corridor to evacuate power from the Braka Nuclear Power Plants. There is a need to

establish new intermediate 400kV grid station at some point in the Eastern region (e.g. Hameem

Junction near ICAD/Mussafah) not only to facilitate large volumes of power transfers across West-

East corridor but also strengthen the overall 400kV transmission system.

In the Attachment-B, figures-B6 to B8 (400kV & 220kV network) and figures B14 to B16 (132kV

network) show the evolution of transmission network for the period 2016-2018 for the best-view

planned transfers.

Figure 6-4 shows the expected 400kV transmission network configuration by 2018 to meet the best

view planned transfers.


Figure 6-4 Expected main bulk 400kV transmission network configuration by 2018.

Attachment-C (Figure-C1 to Figure-C32) includes detailed forecast power flows on the

transmission system in PSS/E format for the valid peak and off-peak load conditions.

Attachment-D (Table-D1 to Table-D4) includes the three-phase and single-phase fault levels for

each electricity transmission node for valid network conditions for the best-view planned transfers.


Al-Ain

South West

Dahma

Sweihan

Mussafah

Shahama

Warsan

Dhaid

Ras Al Khaimah

Madinat Zayed

To Salwa 400kV grid

Station (KSA)

Sharjah Qidfa

Sila

Bab

ICAD Mahawi

Bahia

Al Wasit Area

(Sultanate of Oman)

Shamkha

Hameem

Ajman

New Fujairah

City SAS Al Nakheel

Beach

Al Qurm

ADST

ReemSadiyat

Bahia

Braka

Shuweihat

SASN

Taweela

400kV grid station

New 400kV grid station

400kV Tower

(double circuit)

New 400kV Tower

(double circuit)

400kV Cable

Single Circuit

New 400kV Cable

Single Circuit

Single 400kV



Ruwais


6.2 System Performance and Network Management

The main highlights of the system performance and network management issues are as follows:

a) TANE 400kV grid station is connected by 2x400kV overhead line circuits. Therefore, there is

a need to constrain some generation at TANE power station during maintenance period. This

constrain could be eliminated either by adopting improved overhead line maintenance practice

(e.g. live-line maintenance) or reinforce TANE 400kV grid station with additional 400kV OHL

circuits. Historically the mitigation plan is linked into the development of Taweela-C generation.

Otherwise, the economic case for reinforcing the TANE 400kV grid station with additional 400kV

OHL circuits appears weak.

b) High 400kV fault levels are expected at 400kV bus in Taweela Power Station from 2012.

Splitting the 400kV system in Abu Dhabi Island i.e. opening 400kV cable circuits between ADST-

E19 or splitting 400kV bus at Taweela Power Station among other options are available to manage

the 400kV fault levels within acceptable levels.

c) High 132kV fault levels are expected in certain pockets of Abu Dhabi Island and Sas Al

Nakheel/ Umn Al Nar (SASN/UAN) Zone. The impact of UAN plant lifetime extension is that the

132kV fault levels at Umn Al Nar, Sas Al Nakheel, Salt & Chlorine and Khalifa Park exceed their

switchgear rating under certain operating conditions when generation at both Umn Al Nar and Sas

Al Nakheel Power Stations run at the same time. The mitigation plan is to manage the 132kV fault

levels within acceptable limits by adopting one or more measures such as splitting the 132kV

system, de-coupling the 220kV network at UAN, limit the generation connected to UAN 132kV

switchgear among other options until the existing generation at UAN Power Station retires.

d) Under certain network operating conditions, the single-phase 132kV fault levels are high at

certain downstream 132kV substations in SASN/UAN and Qidfa (QDFA) Zones. TRANSCO has

plans to install neutral grounding reactors (NGRs) at 132kV neutrals of 400/132kV 500MVA

transformers at the SASN and QDFA 400/132kV grid stations by 2014. To manage the 132kV

fault levels in SASN/UAN Zone during the interim period is to adopt one of the mitigation plans

described in Item-c above. The mitigation plan in QDFA Zone is to place restriction on Fujairah

F1 Extension generation connected to F1PS and QDMN 132kV switchgear.


e) Currently the supplies to Shamkha area are non-firm which are fed by 220/33kV mobile

stations. These non-firm supplies are expected to be cleared after the establishment of Shamkha

400/132kV grid station and related 132kV downstream substations in 2014/2015.

f) The Raha-A 132/22kV substation (RBAA) in Raha Beach area is fed by a single 132kV cable

circuit during the interim period 2011-2013. For 132kV incoming cable circuit outage during this

interim period, ADDC have to transfer those loads to RBBB 132/22kV substation through 22kV

network as there is enough upstream capacity to accommodate the transferred loads. This

arrangement is expected to be active till Bahia 400/132kV grid station is established (planned in

2013) which provides main upstream supply source for RBAA and RBBB 132/22kV substations.

Further more ADDC has confirmed that all completed developments within Raha Beach area are

supplied from Raha-B 132/22kV substation (RBBB) and therefore there is no risk of loss of supply

for the customers in the area for a fault on 132kV cable circuit connected to RBAA.

g) The 132kV switchgear of the old Mushrif 132/11kV (W24) substation will remain in operation

to maintain the interconnection with Mussafah 132/11kV substation (4x40MVA) to comply with

security of supply at Mussafah for N-1 contingency. This arrangement will remain active till

Mahawi 400/132kV grid is commissioned (planned in 2014) and that the existing Musssafah

132/11kV is transferred to Mahawi zone.

h) Table 6-1 shows the existing 220kV overhead line transmission capability at BAB, BUHASA

and ASAB. The indicated capability is expected to be active till such time the 400/220kV grid

station is established in BAB (planned in 2014) and that the 220kV reinforcement works in

BAB/ASAB areas are completed (planned in 2014). During the interim period the existing

ADNOC generation will have to meet any such additional demand requirements at the above

supply points.

Table 6-1 Existing 220kV overhead line capability (MW) at BAB, BUHASA and ASAB.

Available 220kV capability (MW) until planned reinforcement works are established for ADNOC Group Network Condition

BAB BUHASA ASAB

Intact 260MW 161MW 255MW

One 220kV circuit outage (N-1) 150MW 140MW 165MW


i) After establishing the ICAD 400/220kV grid station 220kV cable/OHL network re-arrangement

is planned between MGIC and Mussafah Steel (MOSF) 220kV grid stations to comply with the

security standards. During the period 2012-2015, there is a need to open the low voltage side of the

400/220kV transformers at ICAD/Mussafah to limit the 220kV fault levels and control the 220kV

power flows in Mussafah area within acceptable limits. Also, there is a need to manage the 220kV

arrangement in Watbha/Mahawi area to ensure supplies are secured till Mahawi 400/132kV grid

station is established (planned in 2014).

j) TRANSCO is currently exploring technology options of adopting higher rating overhead line

conductors for increased power transfers across certain sections of the transmission corridors

(e.g. West-East corridor, ICAD-Mussafah corridor), increased use of XLPE cables in areas of high

amenity value at voltages up to 400kV and the application of static and dynamic reactive power

compensation in the system. TRANSCO wishes to addresses these among others issues by gaining

better understanding of the risks and constraints in the network and will be subject of future

developments in 7YPS.


7.0 Asset Management

The transmission network is comparatively young. However, there will be requirements for assets


management process improvements are required to capture the “knowledge to build only what

needed”. Integrated outage management and risk assessment needs to be considered for improved


programmed and managed innovatively to better position the transmission network for next 20

years of operation and maintenance.

It should be noted that TRANSCO recent management practice is to move towards achieving

PAS55 requirements. This is to be achieved through a structured asset management process that

takes cognizance of best practice asset management principles for the development and

stewardship of the transmission network and requirements for capital assurance governance. The

PASS55 framework includes policies, procedures and processes for managing the asset base and

also embraces continuous improvement - an aspect important to TRANSCO as it seeks to better

understand its assets to identify the short- and long-term replacement requirements. As part of the

PASS55 process and the associated need of a long term network development strategy,

consideration has not only been given to the requirements of the transmission system to

accommodate load growth but also to the requirements to replace assets as they come to the end of

their useful life or where there performance or technologies employed result in inefficiency.

In the short to medium term, the average total forecast replacement expenditure is expected to be

less than 1% of the total load-related expenditure for the next five years. The asset class that

contributes to the replacement expenditure is transformers, switchgear, protection and auxiliary

systems. This is due to their age reaching the end of useful life and technology being obsolete.


8.0 Transmission System Capabilities and Opportunities

The network development plans and schemes discussed in the previous sections of the report

satisfies the most-likely best-view planned power transfers in different regions across the

transmission system associated with the range of demand and generation backgrounds. As a pre-

requisite of identifying opportunities, there is a need to understand the transmission system

capabilities. An assessment of the bulk transmission system capabilities gives an indication the

extent to which the system can accommodate the circumstances outside the chosen likely best view

planned transfers. It also provides an appreciation of opportunities available in the transmission

system to accommodate new generation and demand in different regions across the system.

In this Chapter, a commentary note is provided on the main bulk transmission system capabilities,

opportunities available for potential new generation connections, new connections (grid supply

points) related to the main interconnected transmission system and new demand connections (i.e.

at the interface demand supply points with the distribution network) upto 2018.

8.1 Main Bulk Transmission System Capabilities

The transfer capability across the boundary provides a broad appreciation of the overall capability

of the bulk transmission network to transport power. The transfer capability across a particular

boundary is the power flow across that boundary without causing any unacceptable conditions as a

result of Secured Event. Two types of system limitation relating to the transfer of power across a

boundary have been considered. The first relates to thermal limitation and the second voltage

limitation. The overall transfer capability across the boundary is the lower of the thermal (MW)

and voltage limitations. The transfer capability gives an indication of the maximum transfer across

the identified boundary that can be supported without contravening any of the unacceptable

conditions following a “Secured Event”.

Figures 8-1 to Figures 8-5 shows the transfer capabilities, envelope of likely transfers range and

the best-view planned transfers across the five identified boundary corridors. These capabilities are

assumed for specific generation pattern (assuming Taweela-C as the next potential generation

option after Shuweihat S3 generation).


Figure 8-1 shows the transfer capabilities across West-East corridor. The Western region is

considered to be the source, and other regions act as sink. For the period 2010-2018 transmission

reinforcements are required to cater for the committed generation and demand connections within

the Western region. The introduction of nuclear generation during 2017-2018 mandates

transmission reinforcements across the West-East corridor thereby increasing the planned transfers

and capabilities across the corridor at a similar rate. However, the rate of additional reinforcements

needed across the West-East corridor is dictated by either non-realization of major bulk industrial

demands within the Western region or due to policy change to provide additional export

requirements to the Northern Emirates by 2020 and beyond.

Figure 8-1 Transfer capabilities across West-East corridor.

Figure 8-2 shows the transfer capabilities across Northern Emirate-Abu Dhabi Emirate corridor.

The Northern Emirates is considered to be the source, and Abu Dhabi Emirate act as sink. During

the period 2010-2018, the existing transmission infrastructure across Northern Emirates-

Abu Dhabi Emirate corridor is sufficient to meet the import/export requirements of the region.

However, further investments are required to reinforce this corridor if the import/export

requirement of the region increases due to any policy change or additional new generation is

introduced in the Northern Emirates.

0

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Envelope of Likely Transfers Range Best View Transfer Transfer Capability


Figure 8-2 Transfer capabilities across Northern Emirates-Abu Dhabi Emirate corridor

The transmission reinforcements planned across the bulk transmission corridors, Eastern region to

other regions (Figure 8-3) and Eastern region to Abu Dhabi Islands’ (Figure 8-4), and across Al-

Ain region-Other regions’ corridor (Figure 8-5) are optimized to provide enough capability to meet

the likely best-view planned transfers.

Figure 8-3 Transfer capabilities across Eastern-other region corridor

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Figure 8-4 Transfer capabilities across Eastern region-Abu Dhabi Islands’ corridor

Figure 8-5 Transfer capabilities across Al Ain region-Other regions’ corridor

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8.2 Generation Connection Opportunities

The production of electricity and the desalinated of water are dominated by large-scale operators

using conventional technologies such as gas turbines and thermal desalination. The current demand

is met by these large-size power plants which are gas turbine based operating in various modes

including combined cycle and co-generation. These large-size power plants are located along the

coast-line in Taweela and Sas Al Nakheel/Umn Al Nar (in Eastern region), Shuweihat (Gharbia

region) and Fujairah-Qidfa (in Northern Emirates).

The generation capacity expansion plans and identification of potential new generation sites are

carried out by ADWEC/ADWEA Privatization Directorate. The ability to connect new potential

generation connections that requires the least electricity transmission reinforcement is the main

consideration given for the purpose of identifying the opportunities of this category. However,

other aspects such as technical, economical, environmental and the need for water production and

transmission among other policy directives are to be given due weighting in the selection of the

optimum generation site location.

Figure 8-6 shows the existing generation sites and capacity available; planned committed large

central generation capacity and future potential opportunities for the new generation connections

upto 2018/2020.

Following are the future potential opportunities for the new generation connections upto

2018/2020:

Sas Al Nakheel/Umn Al Nar (SASN/UAN) – Eastern region

Due to the site’s close proximity to the load centers in Abu Dhabi Islands’ and the future on shore

mega project developments and the availability of the existing transmission infrastructure, Umm

Al Nar (UAN) would be an ideal site on which to locate some generation capacity after the

proposed retirement of the existing UAN plant.

Al-Ain region

There is some potential power only in-land desert locations suitable for adding renewable

generation facilities considering the policy driver for achieving renewable energy target and due


considerations given to the environment. These could be located close to Sweihan/Al-Ain Power

Station area (in Al-Ain Region). The main benefit of these desert sites is their close proximity to

the load centers and availability of existing transmission facilities. Also, fossil fuel power station

near Sweihan is another possibility since it is close to the gas supply infrastructure, e.g. DEL’s

Taweela-Fujairah gas pipeline passes through this area.

Figure 8-6 Potential new generation connection opportunities.

Fujairah Qidfa - Northern Emirates

The existing FEWA Fujairah site, located between the ADWEA Fujairah F1 and F2 power plants

was planned to be transferred to ADWEA as part of Asset Transfer Agreement. This site could

potentially be used for a future Fujairah F3 development. There will be no need to build new

transmission infrastructure to interconnect additional generation facilities at Fujairah Qidfa site as

there will be adequate transmission capability from the existing and planned transmission

infrastructure works from the site, subject to addressing environmental concerns.

Gharbia (Western Region)

Eastern Region

Abu Dhabi Islands

Northern Emirates

Braka

Nuclear Power Plant

5.6GW 3.2GW

1.6GW

Shuweihat S1/S2

(SCIPCO, RPC)

Shuweihat S3

Wind Farm (Masdar)

40MW

Taweela Area

(TAPCO, GTTPC, ECPC)

4.6GWUmn Al Nar/

Sas Al Nakheel

(APC)

Fujairah Qidfa Area

(ESWPC, FAPCO)

3GW

2.4GW

0.4GW0.2GW

Mirfa

(AMPC)

Madinat Zayed

(AMPC)

0.1GW

e.g. CSP Solar Plant Shams-1(Masdar)

110MW

PV Solar Plant (Masdar)

50MW

0.25GWAl-Ain Power Station

(AMPC)

e.g. PV Solar Plant Nour-1(Masdar)

100MW

Sila

Sweihan

Total Available Generation Capacity

by 2020(includes only identified capacity as on Jan’2011)

~20GWLegend

Existing Generation Plant Site

Planned Committed Generation Plant Site

Existing Renewable Generation Plant Site

Future Potential Generation Site Opportunities (Fossil fuel or other type)

Future Potential Renewable Generation Site Opportunities


Ras Al Khaimah/Hamria - Northern Emirates

Given that the supply requirements of Northern Emirates may exceed 3GW by 2014, it may be

prudent to consider locating either fossil fuel or other generation types in the Northern Emirates, as

the future site expansion at or near the existing Fujairah site is limited.

Taweela Site – Eastern region

The existing generation capacity available at Taweela site is about 4.6GW. This site could

potentially be used for a future Taweela-C development. However, the possibility of adding any

future capacity in Taweela site will be limited by the expected congestion arising due to the

location of Emirates Aluminum Plant (EMAL) and planned Khalifa Port and Industrial Zone

(KPIZ) and/or possible arise of security and environmental concerns. The long-term demand

requirements of KPIZ could potentially exceed 1GW. Locating additional capacity in Taweela area

will reduce the transmission infrastructure costs of KPIZ due to its close proximity to a major load

centre.

Al Mirfa Site – Gharbia region

Al Mirfa site could be considered as a strategic and most favorable location for the future addition

of electricity and water capacity. This location is in close proximity to the major industrial load

centres (ADNOC Group loads in Mirfa, Bab & Buhasa) and also closer to the industrial load

centers of Eastern region and has potential to improve the overall transmission grid performance in

the long-term.

Potential for Renewable Additions in Gharbia and Eastern regions

There is huge potential for adding renewable at Madinat Zayed, Sila and Sir Baniyas Island in the

Gharbia region; and Masdar Green City in Eastern region. The main benefit of these desert sites is

their close proximity to the load centers and availability of existing transmission and distribution

infrastructure.


8.3 Main Interconnected Transmission System Opportunities

The 400kV main transmission system interconnects all major electrical power stations and serves

various load centres (demand supply points) through 400/220kV and 400/132kV grid stations (grid

supply points). The opportunities at the grid supply points are assessed based on the expected

utilization on these grid stations to connect the potential new loads over and above the forecast

demand by 2018. Figure 8-7 and Figure 8-8 shows the quantities and utilization of the 400kV grid

stations which are expected to be interconnected to the main transmission network by 2018 for the

three demand forecast scenarios.

Figure 8-7 Expected quantities of 400kV grid stations by 2018.

0

5

10

15

20

25

30

35

40

2010 2012 2014 2016 2018

Year

Qu

an

tity

of 4

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kV g

rid s

tatio

ns

16GW Scenario 20GW Intermediate Scenario 24GW Scenario


Figure 8-8 Utilization of 400kV grid stations in 2010 and 2018.

Users have good opportunities to connect their demand supply points at the following 400kV grid

supply points whose utilization is less than 50% by 2018:

• Reem and Sadiyat grid stations in Abu Dhabi Islands’ region.

• Bahia, Shamkha and Shahama grid stations in Eastern region.

• Shuweihat grid station in Gharbia region.

• Ajman and Fujairah City grid stations in Northern Emirates (only for 16GW Scenario).

• Hameem Junction grid station (near ICAD/Mussafah) in Eastern region (only for 20GW

Scenario).

• Zayed Sports City (in Abu Dhabi Island); Taweela/KPIZ (in Eastern region); and Al-Ain

Airport (in Al-Ain region) – [only for 24GW Scenario).

0

10

20

30

40

50

60

70

80

90

100

qua

ntity

of

400

kV g

rid s

tatio

ns (

%)

Utilization of 400kV grid stations ≥ 75%-100%

2010 2018

Utilization of 400kV grid stations ≥ 50% and < 75%

Utilization of 400kV grid stations < 50%

16GW Scenario 20GW Scenario 24GW Scenario


8.4 Demand Connection Opportunities

The electricity transmission system is essentially spread across five regions namely Abu Dhabi

Island, Eastern region, Gharbia region, Al-Ain region and Northern Emirates. Each of these

regions has its own network characteristics. In Abu Dhabi City and neighboring islands, the

principal sub-transmission voltage is 132kV. Both 220kV and 132kV sub-transmission voltage

levels are available in the Eastern region, whilst 220kV sub-transmission voltage level is

predominant in the Gharbia and Al-Ain regions. In high load density area of Abu Dhabi City,

direct transformation from 132kV to 11kV already exists. The 132kV to 22kV voltage level is

recently introduced for the new mega project developments in the neighboring Islands and Eastern

region within the vicinity of Abu Dhabi Island. The 132/11kV and 132/22kV substation capacity

are configured with 4x40MVA and 4x80MVA respectively. In the medium and low load density

areas of Eastern/Al-Ain regions and Gharbia region respectively, transformation from 220kV to

33kV exists. Most of the existing 220/33kV substation capacity is either 2x140MVA or

3x140MVA.

The opportunities at the demand supply exit points in Abu Dhabi Emirate are assessed based on

the expected utilization on these stations to connect the potential new loads over and above the

forecast demand by 2018. Figure 8-9 and Figure 8-10 shows the quantities and utilization of the

demand supply exit stations which are expected to be interconnected to the main transmission

network by 2018 for the three demand forecast scenarios.

Figure 8-9 Expected quantities of demand supply exit stations by 2018.

50

60

70

80

90

100

110

120

130

2010 2012 2014 2016 2018

Year

Qu

antit

y o

f dem

and

su

pp

ly e

xit

poin

ts

16GW Scenario 20GW Intermediate Scenario 24GW Scenario


Figure 8-10 Utilization of demand supply exit stations in 2010 and 2018.

Users have good opportunities to further connect additional demands at the demand supply exit

points whose utilization is less than 50% by 2018 located in the following areas:

• Reem, Sadiyat and Suwa Islands in Abu Dhabi Islands’ region.

• Raha Beach, Mohamed Bin Zayed City/Mussafah, Shamkha, Al Falah, New Airport and

Ghantoot in Eastern region.

• Al-Ain South West, Al-Ain Industrial City, Ain Al Faydha, Al Mukkam, Al Foah and Al-Ain

Power Station in Al-Ain region.

• Green Head (W41), Marina Mall, Souq (E01), Danet (E40), E03, Corniche (E12), W59/02

(for 16GW scenario); Zayed Sports City, W24/02 and E25/02 (for 20GW and 24GW scenario)

in Abu Dhabi Island.

• ICAD, Al Nahdha, Yas Island, Capital District, Samha (for 16GW scenario); and Khalifa (for

20GW scenario) in Eastern region.

• Central and Gayathi (for 16GW scenario) in Gharbia region.

• Ramah, Khazna, Mazyad, Al Wagon, Umn Al Oush and Al Mukkam (for 16GW scenario) in

Al-Ain region.

0

10

20

30

40

50

60

70

80

90

100

quan

tity

of d

eman

d su

pply

exi

t poi

nts

(%)

Utilization of demand supply exit points ≥ 75%-100%

2010 2018

Utilization of demand supply exit points ≥ 50% and < 75%

Utilization of demand supply exit points < 50%

16GW Scenario 20GW Scenario 24GW Scenario


Attachment-A contains the electricity demand forecast at the demand supply exit points for Year

2011-2018; and Attachment-B shows the electricity transmission network topology (400kV,

220kV and 132kV system) for Year 2011-2018. These Attachments gives further details on the

expected demand forecast at the demand supply exit points which provides opportunities (in terms

of location and timeline) available for the Discos or any other entity seeking the use of the


9.0 Capital Delivery

As explained in the previous chapters, the transmission system development requirements and

associated investments are driven by the demand and generation background and the resulting

power transfers on the transmission system. As there will continue to be a degree of uncertainty in

the realization of the volume, location and timing of demand and generation backgrounds in any

given area, the potential transmission reinforcement plans shall be established in a phased manner

and that the options are maintained at minimum cost to provide a least regret solution.

In view of the economic downturn and greater uncertainty in the development requirements; some

project proposals and schemes are evaluated with intent of optimizing the assets’ utilization taking

into account the potential risks. The risks could be if the demand does not materialize as expected

or if the demand comes early, project delays and its impact on network performance and security

of supply could result. Risk mitigation measures through various scenario/optioneering approaches

are built into the planning proposals by engaging relevant Stakeholders and Users in order to

achieve a consensus on the optimum balance of overall benefits/savings and risk trade-off.

Considering the current economic scenario, TRANSCO has already taken action in delaying some

planned assets or relocating elsewhere if the contracts already awarded. Hence, there is a

likelihood of potential deviations of some project proposals and schemes included in this 7YPS

Table 9-1 below provides a brief high-level summary of capital and replacement projects. These

include only the major on-going, currently under tendering process and new planned power

projects to meet the future demands and performance standards for the period 2012-2018. These

projects have been categorized according to their needs and drivers. Whilst some of these

identified seven year capital projects shall be initiated depending on their priority level and subject

to the receipt of approvals from relevant authorities, for others it is proposed to continue monitor

the developments of the market and update the plans accordingly.


The detailed capital delivery and capital forecast for the on-going and planned power projects to

meet the future demands and performance standards including the replacement projects are

reported separately and released only to the RSB. In that report TRANSCO have taken the

opportunity to maintain the capital delivery transparency by presenting for regulatory review a

year-on-year view of planned and delivered capital performance.

S.N Project Description Category Connection Type Drivers/Needs Status Priority

1400/220kV (3x500MVA) grid station and 220/33kV(2x3x100MVA) grid station at ICAD; and related 400kV and 220kV OHL interconnection works.

Load MITS/exit pointTo meet the demand requirements of Emirates Steel, ICAD/Mussafah area and relieve the loading on the existing Mussafah 400/220kV grid station.

R

2400/132kV (3x500MVA) grid station each in Ajman and New Fujairah City; and related 400kV OHL interconnection works.

Load MITS

3132/33kV substation each in Sudah Port (3x100MVA) and Al Hayl (2x100MVA); and related 132kV OHL interconnection works.

Load Exit point

4220kV GIS modification works at Madinat Zayed 400/220kV grid Station.

-Generation entry

pointTo integrate Masdar CSP Shams-1 plant. R

5Re arrangment of 220kV circuits between MGIC and Mussafah Steel (MOSF).

Load MITSTo meet Emirates Steel phase-2 supply requirements; and comply with network performance standards.

P

6220kV cable works between Dahma - Zakher grid stations in Al Ain Region.

Load MITSTo meet demand requirements in Al-Ain region and comply with network performance standards.

R

7220kV OHL works for ADCO's 1.8MMBD Projects in Qusahwira.

Load Exit point To meet demand requirements of ADCO’s 1.8MMBD Projects in Qusahwira. R

To meet the demand requirements of Northern Emirates and meet the statutory obligations of ADWEA-FEWA Agreement.

R

Table 9.1 High-level summary of capital power projects for Year 2012-2018

Year 2012

TRANSCO/AMD/PNDD TRANSCO 2011 7YPS (2012-2018) Nov' 2011Report of 85



1 400kV cable works (2nd circuit) between ADST-Sadiyat. Load MITSTo increase power transfers and transfer capability between Abu Dhabi Islands'-Bahia-Taweela corridor and enabling dismantling of 400kV OHL along the ADST-Sadiyat corridor as per the policy.

R

2400kV 2nd interconnection cable works between TANE-EMAL Smelter.

Non-load MITSTo secure the back-up supplies during "Secured Event" conditions in EMAL Smelter.

P

3400/132kV grid station works in Bahia, and related 400kV OHL works.

Load MITSTo provide upstream supply source for Bahia, Raha, Yas Island and Airport areas, enabling ganging of 400kV OHL/cable circuits across Taweela-TANE-Bahia-Sadiyat corridor and facilitate power evacuation from TANE generation.

R

4220/33kV (2x140MVA) grid station at Ghantoot and related 220kV OHL works.

Load Exit pointTo meet ADDC demand requirements in Ghantoot/Seih Al Sedaira (Al Ghadeer).

R

5132/33kV (3x100MVA) transformers and related 33kV switchgear works at Taweela-A.

Load Exit point To meet initial demand requirements of Khalifa Port and Industrial Zone. R

6 220/33kV mobile station at Shamkha. Load Exit pointTo meet the increasing demand requirements in Shamkha area until the establishment of permanent supply source for the area.

P

7220kV GIS works at Sanaiya for integrating Masdar Noor-1 PV Solar Plant.

-Generation entry

pointTo facilitate integration of Masdar Noor-1 PV Solar Plant. P

8 3rd 220/33kV transformer works at Sila Load Exit point To meet ADDC additional demand requirements in the area. P

9132/11kV substation and related 132kV cable works for Sir Baniyas Island.

Load Exit pointTo meet ADDC demand requirements in Sir Baniyas Island and facilitate integration of Masdar Wind Farm.

R

10400kV grid station at Shuweihat S3, and related 400kV OHL works.

-Generation entry

pointFor S3 IWPP generation integration. R

11 400kV grid station at Ruwais, and related 400kV OHL works. Load MITS To meet Takreer demand requirements in Ruwais Industrial Area. R

12132kV substation and related 132kV OHL works at Khorfakkan, Dadnah, Dibba, Tawyeen and Kalba.

Load Exit pointsTo meet the demand requirements in the mentioned areas and support the export commitments agreed between ADWEA and FEWA.

R

Year 2013




13132/11kV substation and related 132kV cable works at E12, E03, E25/02 and ADNEC; and Presidential Palace (Ras Al Akdar) in Abu Dhabi Island.

Load Exit points

a) The need for E12 132/11kV substation is to meet ADDC demand requirements in the area and facilitate transfer of loads of existing CHP (33/11kV) substation loads as per ADDC plan to phase out 33kV system in Abu Dhabi Island. b) The need for E03 132/11kV substation is to relieve loading on the existing E04 132/11kV substation (MDZD), meet the demand requirements in the area and facilitate transfer of loads of existing E4-1 (33/11kV) substation loads as per ADDC plan to phase out 33kV system in Abu Dhabi Island. c) The need for E25/02 132/11kV substation is to meet ADDC demand requirements in the area and relieve loading on existing E25 132/11kV substation. d) The need for 132/11kV substations in ADNEC and Ras Al Akdar is to meet the demand requirements in the respective areas.

R

14132/22kV substation and related 132kV cable works at New Airport and Capital District in Eastern region.

Load Exit pointTo meet the demand requirements of Airport and Capital District area. Also, it is expected that the demands in Mafraq area as well are planned to be supplied from Capital District 132kV substation.

R

15132/22kV (4x80MVA) substations and related 132kV cable works in Falah area.

Load Exit pointTo meet the demand requirements of Al Falah Community and in the vicinity area of Shamkha.

R

16132kV cable interconnection works between Yas Island and Bahia 132kV substations

Load Exit point To meet permanent and secure supplies to Yas Island 132/22kV substation. R

17132/11kV (4x40MVA) substation and related 132kV cable works in Khalifa-C.

Load Exit point To meet ADDC demand requirements in Khalifa and vicinity area. P

18 132/11kV mobile station at M12. Load Exit point To meet the initial urgent demand requirements loads in Musaffah M12 area. P

1400kV cable works between Bahia and Sadiyat grid stations (3 circuits).

Load MITS R

2400kV OHL modification works between TANE/Taweela Power Station and Bahia grid station.

Load MITS R

To increase power transfers and transfer capability between Abu Dhabi Islands'-Bahia-Taweela corridor and enable dismantling 400kV OHL along the ADST-Sadiyat-Bahia corridor.

Year 2014




3 400/132kV(3x500MVA) grid station in Mahawi. Load MITS R

4400kV cable works between Sas Al Nakheel and Mahawi (2 circuits); and between Mahawi and Mussafah (3 circuits).

Load MITS R

53rd 400/132kV 500MVA transformer and grid station reinforcement works in Sas Al Nakheel.

Load MITSTo meet the demand requirements in SASN Zone and alleviate capacity shortfall in SASN 400/132kV grid station.

P

6400/220kV grid station in Oman (Wasit) and related 400kV overhead line works between Wasit and Sweihan.

Load MITS

Currently, the existing 220kV OHL interconnection from Al Foah 220kV grid station (AOHG) to Mahadha 220kV grid station (in Al-Wasit area Oman) is limited to the maximum exchange about 170MW (for N-1 condition). This is because of the internal OETC network limitations mainly attributed to the risk of voltage collapse due to the weakness of its 132kV network. As per EDF study (in Yr 2008), even with some reinforcements on Oman side, the 220kV interconnection link between U.A.E and Oman would still remain very weak link. The need to establish 400/220kV grid station in Oman is to alleviate the above limitation and facilitate larger power exchange between UAE-Oman.

P

7220/33kV(3x120MVA) grid stations and related 220kV overhead line/cable works in Maqam and Ain Al Faydha in Al-Ain region.

Load Exit pointsTo meet AADC demand requirements in Maqam and Ain Al Fydha in Al-Ain region.

P

8220/33kV(3x120MVA) grid station at Al-Ain Power House; and 220/33kV (2x140MVA+3x120MVA) at Zakher and related 220kV cable works in Al-Ain region.

Load Exit points

To meet AADC demand requirements in Al-Ain Power House and Zakher area. The need for new Zakher grid station is to alleviate restrictions on transformer loading, meet expected demand growth and the stage-wise replacement of existing Zakher grid station. The need for new 220/33kV grid station at Al-Ain Power House is to alleviate restrictions on transformer loading, meet expected demand growth and facilitate decommissioning of Al-Ain Power Station after 2016.

P

93rd 220/33kV(140MVA) transformer in Maziyad 220/33kV grid station.

Load Exit pointTo alleviate capacity shortfall in Maziyad 220/33kV grid station and meet the increasing demand requirements in the area.

P

10400/220/33kV (3x500MVA) grid station and related 400kV and 220kV overhead line works in Bab.

Load MITS To meet ADNOC group demands in Bab area. P

11400kV overhead line works between Ruwais and Bab grid stations.

Load MITSTo facilitate power evacuation from Shuweihat S3 generation and enhance the transfer capability across Gharbia-Eastern region corridor.

P

a) To meet ADDC demand requirements in Mahawi area. b) Facilitate transfer of Mussafah and M12 132/11kV substations to Mahawi Zone. c) Enabling establishment of 132kV network in Mahawi and Watbha area consistent with the voltage policy and to meet Abu Dhabi Government strategic plans to expand the urban environment of the Abu Dhabi City to include Mahawi area. d) Enabling dismantling 400kV and 220kV OHL along SASN-Mahawi-Mussafah corridor.




12220kV switching station in Asab and related 220kV overhead line works(400kV design) between Bab, Asab Switching station and Shah.

Load MITS To meet ADNOC group demands in Shah and Asab. P

13400/132kV (3x500MVA) grid station and related 400kV overhead line works in Sharjah.

Load MITS To meet the demand requirements in Sharjah area. P

14132/11kV (4x40MVA) substation in Mussafah M12, 132/33kV (3x120MVA) substation in Nahdha and related 132kV cable works.

Load Exit points To meet ADDC demand requirements in Mussafah and Nahdha area. P

14132/33kV substations in Mahawi (4x120MVA), Wathba (3x120MVA); 132/22kV substation(4x80MVA) in Mohammed bin Zayed; and related 132kV cable works.

Load Exit pointsTo meet ADDC demand requirements in Mahawi, Wathba and Mohammed Bin Zayed City areas.

R

1400kV cable works (3rd circuit) between ADSTand Sadiyat grid stations.

Load MITSTo alleviate overloading on 400kV cable circuits between ADST-Sadiyat. These works are subject to feasbility of obtaining route/corridor along the Section.

P

2400/220kV grid station works, related 400kV overhead line works for integrating Taweelah-C generation.

LoadGeneration entry point and MITS

To integrate new generation from Taweela-C subject to confirmation from ADWEA Privatization Directorate/ADWEC and/or provide supply source for Khalifa Port and Industrial Zone (KPIZ). The need for providing supply source for KPIZ will be subject to updated ADWEC/ADDC demand forecast review for the area in 2012/2013.

C

Year 2015




3400/132kV(3x500MVA) grid station and related 400kV overhead line works in Shamka.

Load MITS

a) Enabling establishment of 132kV network in the eastern portion of the Abu Dhabi Mainland consistent with the voltage policy and to meet Abu Dhabi Government strategic plans to expand the urban environment of the Abu Dhabi City to include Shamkha area. b) Avoiding short term investments that would have been required to reinforce the existing 220kV network to eliminate the current network arrangement that is non-compliant with TRANSCO’s security of supply License obligations and its associated loss of supply risk as a result of supplying loads by non-secure mobile 220/33kV substations.c) Increase the strength of 400kV system backbone by establishing a new intermediate grid station to gang the circuits together at some point in the Abu Dhabi area to improve the voltage profile and stability in the Al Ain area. d) Enabling additional transmission corridors between the 400kV system backbone and expected load center in Abu Dhabi main land as the capacity of the current Mussafah-SASN corridor is limited.e) Enabling the establishment of permanent downstream 132kV substations to meet ADDC supply requirements in Shamkha area and in its vicinity.

P

4400kV grid station works in Braka to integrate nuclear power plant and related 400kV overhead line works (i.e. turn-in 400kV OHL works of Shuweihat S3-Sila into Braka 400kV grid station).

LoadGeneration entry

pointTo facilitate start-up operations of Braka nuclear power plant and integrate phased nuclear power generation at Braka from 2017.

P

5220kV cable works for Emirates Steel Phase-3/4 (i.e. to provide power supply to new 220kV grid station (MOSF-2).

Load MITS To meet the phase-3/4 demand requirements of Emirates Steel extension. C

6220kV grid station works in Mirfa Power Station for integrating Al Zawra Gas Turbines.


point

To integrate new generation from relocated Al Zawra gas turbines which is currently on "HOLD" subject to confirmation from ADWEA Privatization Directorate.

R

7132/11kV (4x40MVA) substation and related 132kV cable works in sector W24/02 in Abu Dhabi Island.

Load Exit point

To meet the demand requirements in W24 Sector and vicinity area. The need and initiation of this demand supply point will be reviewed and subject to actual utilization of the existing 132/11kV substations in 2015; updated demand forecast review for the area and justified by ADDC.

C

8132/22kV (4x80MVA) substation in Shamkha Housing; 132/33kV (3x120MVA) in Shamkha; and related 132kV cable works.

Load Exit pointsTo provide firm and secure supplies in Shamka area (currently being supplied by 220/33kV mobile stations) and meet the ADDC demand requirements in Shamkha and Shamkha Housing area.

P




1132kV cable works interconnecting Reem Island - Abu Dhabi Island.

Load MITS

To optimize utilization of existing 400/132kV grid stations in Abu Dhabi Island (ADST, E19, E48) and 400/132kV grid station in Reem Island and thereby improve the effectiveness and efficiency of assets. The need and initiation of these 132kV interconnection works will be reviewed and subject to actual utilization of existing 400/132kV grid stations in Abu Dhabi Island in 2013 and updated demand forecast.

P

1400kV grid station modification works at Shuweihat S3 and related 400kV cable works for integrating HPAD generation.


pointTo integrate HPAD generation; subject to confirmation from ADWEA Privatization Directorate/ADWEC and MASDAR.

C

2 4th 400/132kV (500MVA) transformer at Mahawi grid station. Load MITS

To provide secure supplies to Mahawi area. The need and initiation to introduce additional 4th 400/132kV 500MVA transformer at Mahawi or establish a new 400/132kV grid station in the area will be subject to demand forecast update review of Mahawi zone at an appropriate time before initiating the same.

C

3400kV switching station at Hameem Junction (near Mussafah).

Load MITS

To gang the planned 400kV OHL circuits across the Gharbia-Eastern region corridor. The requirements to establish the switching stations will be dictated by: a) Restrictions arising in connecting new 400kV OHL circuits to grid stations around Hameem Junction (i.e. ICAD or Mussafah) and/or. b) Necessity to meet new expected industrial demands in the vicinity of Hameem Junction area.

C

4400kV overhead line works between Braka-Ruwais; and Ruwais-Hameem.

Load MITSTo accommodate power evacuation from Braka nuclear plant and increase the power transfer capability from Gharbia to Eastern region.

C

5132kV cable works between Mahawi 400/132kV grid station and Capital District 132/22kV substation.

Load MITS

To facilitate transfer of Capital District 132/22kV substation from SASN to Mahawi grid zone; create flexibility by establishing 132kV normal open link points to cater for the load transfers between the above-mentioned grid zones; and provide opportunity for connection of new demand supply points to SASN 400/132kV grid station zone.

C

6132/11kV (4x40MVA) substation and related 132kV cable works in Khalifa City (MKDD).

Load Exit point

To meet the demand requirements in Khalifa area. The need and initiation of this demand supply point will be reviewed and subject to actual utilization of 132/11kV substations (MKBB and MKCC) in 2014; updated demand forecast review for the area and justified by ADDC.

C

Year 2016

Year 2017




1400kV overhead line works between Hameem Junction- Shamkha-Sweihan.

Load MITS

To accommodate increase power evacuation requirements from Braka nuclear plant and enhance the power transfer capability from Gharbia to Eastern/Al-Ain regions. The need and initiation to reinforce the 400kV network across Hameem Junction-Shamkha-Sweihan corridor will be subject to confirmation of next generation plant site after Shuweihat S3 and realization of ADNOC group demands in the Gharbia region.

C

2132/11kV (4x40MVA) substation and related 132kV cable works in Zayed Sport City.

Load Exit point

To meet the demand requirements in Zayed sports city area. The need and initiation of this demand supply point will be reviewed and subject to actual utilization of the planned 132/11kV substation (ADNEC) in 2015; updated demand forecast review for the area and justified by ADDC.

C

3132kV cable works interconnecting Sas Al Nakheel (SASN)-Abu Dhabi Island.

Load MITS

To optimize the utilization of E48 and SASN 400/132kV grid stations and thereby improve the effectiveness and efficiency of assets. The need and initiation of these 132kV interconnection works will be reviewed and subject to actual utilization of existing and planned 132/11kV substations in 2015 that belong to the respective E48 and SASN grid zones and updated demand forecast.

C

Priority Planned Projects upto 2015

High Priority

Medium Priority

Low Priority

R - Project currently running ; P- Project under planning phase: C- Project under concept stage

Year 2018


2011 seven year electricity planning statement (2012 … year electricity planning statement... ·...

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