1welcomes hon ’ able members of standing committee on energy oct,14, 2004 power grid corporation...
TRANSCRIPT
1
WelcomesWelcomes
Hon’able Members of
Standing Committee on
Energy
Oct,14, 2004
Power Grid Corporation of India Ltd.
POWERGRID –POWERGRID – An OverviewAn OverviewPOWERGRID –POWERGRID – An OverviewAn Overview It started its operation from 1992-93.
Central Transmission Utility & National and Regional Grid Operator
Operating around 50,000 circuit kms of EHV transmission lines with 82 nos of EHVAC & HVDC sub-stations having transformation capacity of about 47,000 MVA
Such a system carry more than 40% of total power generated.
System availability around 99.5%
POWERGRID - Growth ProfilePOWERGRID - Growth ProfilePOWERGRID - Growth ProfilePOWERGRID - Growth Profile
634983
1770
25332805
236 275 444643
748
0
500
1000
1500
2000
2500
3000
3500
1992-93 1995-96 1998-99 2002-03* 2003-04*
YEAR
RS.
IN C
RO
RE
TURNOVER NET PROFIT5652
6624 6811 6923 6828
0
1000
2000
3000
4000
5000
6000
7000
8000
1992-93 1995-96* 1998-99 2001-02 2003-04
Year ---->
No.
of E
mpl
oyee
s ----
->
35215492
8851
13877
19876
0
5000
10000
15000
20000
25000
1992-93 1995-96 1998-99 2001-02 2003-04
TURNOVER AND NET PROFIT MANPOWER
* MANPOWER TRANSFERRED FROM CEA
GROSS FIXED ASSETS (RS. Crore)
12201
22748
28820
34288
46461
0
10000
20000
30000
40000
50000
1992-93 1995-96 1998-99 2001-02 2003-04
MV
A --
-->
TRANSFORMER CAPACITY (MVA)
POWERGRID- Perspective PlanPOWERGRID- Perspective PlanPOWERGRID- Perspective PlanPOWERGRID- Perspective PlanCreation of National Grid and enhancing inter-regional
transfer capacity from the present level of 9,000 MW to 30,000 MW by 2012
Investment Required by 2012 : Rs. 71,000 CroresBy POWERGRID : Rs. 51,000 CroreBy Pvt. Investors : Rs.20,000 Crores
Investment to take care of evacuation of Central Sector Share of generation addition of 100,000 MW planned till 2012.
Creation of National Grid of 30,000 MW Capacity will lead to reduction in Capacity addition of 13,000MW i.e. saving of Rs. 50,000 Crore in investments besides fuel cost saving.
R&D and Technology Development in R&D and Technology Development in POWERGRIDPOWERGRID
R&D and Technology Development in R&D and Technology Development in POWERGRIDPOWERGRID
HVDC & EHVAC Transmission System upto 800 kV with multi Ckts.
Use of fixed & variable Series Compensator (FACTS)
Extra High Towers to avoid deforestation and protection of wild life
Compact Towers to reduce Right Of Way High Temperature Conductors for increased
Loading Automation of Sub-stations. Compact S/stn to reduce land requirement. Satellite imagery for Transmission Line Survey.
Consultant for Transmission, telecom and Load Despatch System
Major Consultancy Assignments Vishnu-Prayag transmission system of UPPCL Transmission line survey in Afghanistan Optical fibre network for Bhutan Telecom &
National Load Despatch Centre in Bhutan Execution of transmission line from Srinagar to
Leh via Drass , kargil etc. Facilitating Distribution Sector Reforms as
Advisor-cum-Consultant in 105 circles under GOI’s APDRP Scheme.
Strengthening of Transmission, Sub-transmission & Distribution system in UP, Bihar & Goa & Meghalaya.
Rural Electrification of villages of Bihar
POWERGRID beyond TransmissionPOWERGRID beyond TransmissionPOWERGRID beyond TransmissionPOWERGRID beyond Transmission
POWERGRID & Grid ManagementPOWERGRID & Grid Management POWERGRID & Grid ManagementPOWERGRID & Grid Management Modernisation of Regional Load Despatch Centres (RLDC) /
State Load Despatch Centres (SLDC) by POWERGRID Implementing State of the Art Unified Load Despatch &
Communication (ULDC) Schemes for overall improvement
Manpower Manning of RLDC by Senior personnel Training of RLDC & SLDC personnel on regular basis
Procedures GRID CODE Availability Based Tariff
All these resulted into: Significant improvement in System Parameters Merit Order Operation, Leading to Overall Economy Improved grid performance Increased intra and inter-regional Power Exchange and Trading
Philanthropic Approach of POWERGRIDPhilanthropic Approach of POWERGRIDPhilanthropic Approach of POWERGRIDPhilanthropic Approach of POWERGRID POWERGRID developed and implemented “Environment and
Social Policy and Procedure (ESPP)” document in wide consultation with Public, Environmentalists, NGOs and Multilateral Funding Agencies; the only Power Sector Utility to do so
In Talcher Project, too, implementation of Environment and people friendly Social Policy and Procedures Minimization of forest stretch – only 20 Km in 1,400 Km
Electrification of villages under rural electrification programme Electrification of more than 30,000 villages is the states of
U.P., Bihar & West Bengal Modernising power supply system in the institutions like
BHU, IIT Kharagpur on no profit no loss basis Improved power supply as well as training centre for
modern supply system Consultations with public in villages Development of villages
Important FeaturesImportant FeaturesImportant FeaturesImportant Features Talcher II (2000 MW) Generation Project : First inter-
regional project for transfer of total power from Eastern to Southern Region
Transmission System 2000 MW, (+/-) 500 KV, High Voltage Direct current (HVDC) bipole line
from Talcher to Kolar; Longest HVDC link in Asia (more than 1400 Km.) About 750 Circuit Kms. of Alternating Current (AC) transmission lines
for dispersal of power beyond Kolar
Transmission Project Cost & Commissioning Approved Actual
Project Cost 3865 Crore 3100 Crore
Commissioning 42 months 33 monthsSchedule
Unique Features of the ProjectUnique Features of the ProjectUnique Features of the ProjectUnique Features of the Project Vast Transmission System
Total steel used : 90,000 MT Total conductor used : 16,000 Kms.
State of the Art HVDC terminals for conversion from AC to DC
Software based controls, protection and Man-Machine Interface System
Design and execution very challenging due to various rivers crossing enroute (Mahanadi, Vamsadhara, Godavari, Krishna and Pennar)
Important FeaturesImportant FeaturesImportant FeaturesImportant Features
Project conceived with Debt : equity ratio of 80:20 Rs. In Crore
A. Equity 772 B. Debt 3093 TOTAL (A + B) 3865
World Bank loan was considered for AC portion only as per available resources
Supplier’s Credit considered for HVDC portion
OverviewOverviewOverviewOverview
Investment approval took 33 months; Feasibility Report submitted in July 1997 Investment approval obtained in January 2000 Less time left for execution
To minimize project implementation cycle, pre-execution activities undertaken in parallel with investment approval
WorldBank loan tied up in April’ 98 for AC portion
Bids were invited and processed based on World Bank funding. Bidders entitled to Deemed Export Benefits under WB funding
OverviewOverviewOverviewOverviewFunds tie up with World Bank held up due to
economic sanctions
Funding constraint had the potential to delay the project.
Innovative approach to proceed with procurement process was adopted: by seeking special dispensation in Dec.’98 from Govt.
of India for availing Deemed Export Benefits seeking approval of World Bank for retroactive
funding
Surmounting ChallengesSurmounting ChallengesSurmounting ChallengesSurmounting ChallengesIn July 1999, GoI granted a special dispensation
after persistent follow up
Clearance was obtained from WB for retroactive financing at a later date and meanwhile, Rs. 675 Crore also raised through domestic sources in lieu of World Bank Loan
Rs 1,000 Crore of Suppliers credit raised for HVDC portion without sovereign guarantee or any back up guarantee mainly on POWERGRID’s own financial strength
ChallengesChallengesChallengesChallenges Execution time of the project got reduced from 48 months
to 42 months to match with generation
Time Schedule was tight considering the size of the project
Mid-way during the execution, NTPC advanced the commissioning of its first 500 MW unit putting tremendous pressure on POWERGRID
Acute Right of Way Problems considering the spread over a vast expanse of about 2000 km Difficult Terrain and Varied Soil Conditions Challenging Law and Order Situation Need to evacuate surplus power from ER to energy deficit SR.
Surmounting ChallengesSurmounting ChallengesSurmounting ChallengesSurmounting Challenges
Extra-Ordinary Measures Undertaken for timely execution of project Unique Project Definition Manual developed Standardized foundations and tower designs : saved
12-18 months Standardized bidding document and Systems &
Procedures Contracts awarded within months from the date of
project approval by GoI
Inspite of all the constraints right from the inception of the project, POWERGRID completed the project 9 months ahead of schedule and at a cost lesser by Rs. 700 cr.
BenefitsBenefitsBenefitsBenefits Project commenced operation before generation project and
surplus power of about 1500 MUs alone could be transferred prior to generation project
Total of about 12,000 MUs transferred from ER to SR from September, 2002 to September, 2004.
About 5000 MUs of surplus power Balance 7000 MUS from Talcher II Project
Significant improvement in grid performance in SR Grid frequency improved from 48.0-48.5 Hz to 49.5-50.5 Hz Substantial improvement in voltage level (typically Bangalore)
Loss Reduction in SR ; Benefit Rs 290 Crore
Saving of Rs. 1500 Crore to SR on account of availing surplus power, thus postponing immediate investment
ER benefited on account of reduction in fixed charges of generation
Southern Region
Constituent States
Andhra Pradesh
Karnataka
Kerala
Tamil Nadu
UT of Pondicherry
Power Supply Scenario - PresentPower Supply Scenario - PresentPower Supply Scenario - PresentPower Supply Scenario - Present
Installed Generation Capacity- 31328 MW
Peak Demand Unrestricted 21719MW Actually Met 20483MW Peak Deficit (-)1236 MW
Energy Requirement Unrestricted 11478MU Energy Availability 11202MU Energy Deficit (-) 276 MU
As of July, 04
POWERGRID Transmission System in SR - POWERGRID Transmission System in SR - PresentPresentPOWERGRID Transmission System in SR - POWERGRID Transmission System in SR - PresentPresent
Transmission Lines 400 kV and above - 11300 Ckt Kms
EHV Sub-stations - 22 Nos. Total transformation capacity - 8115 MVA Interconnection with neighboring regions
Eastern Region 2000 MW HVDC Talcher – Kolar bipole 500 MW HVDC Back-to-Back station at Gazuwaka
Western Region 1000 MW HVDC Back-to-Back station at
Chandrapur
On-Going and Planned TR. Schemes of On-Going and Planned TR. Schemes of POWERGRIDPOWERGRIDOn-Going and Planned TR. Schemes of On-Going and Planned TR. Schemes of POWERGRIDPOWERGRID
Transmission Lines 400 kV - 7700 Ckt Kms
EHV Sub-stations - 13 nos.
Total transformation capacity - 11525 MVA
Inter-Regional Capacity Eastern Region
Augmentation of capacity of Gazuwaka HVDC back-to-back link
Estimated Cost -5600 Crs
POWERGRID’s Network in Tamil Nadu - ExistingPOWERGRID’s Network in Tamil Nadu - ExistingPOWERGRID’s Network in Tamil Nadu - ExistingPOWERGRID’s Network in Tamil Nadu - Existing
400 kV Transmission Lines - 3330 ckt.kms
400/220 kV substations - 6 nos.
400/220 kV Transformation Capacity – 2520 MVA
Major Load centers being fed through POWERGRID’s transmission network
SriperumbudurTrichyMaduraiSalemUdumalpetHosur
400 kV Transmission Lines -3040 ckt.kms400/220 kV substations -5 nos.400/220 kV Transformation Capacity – 3150 MVAEstimated Cost - Rs. 2100 CrsTransmission network augmentation aims at
Improving power supply to Chennai area through new 400/220 kV substation at Malekottaiyur and completion of 400 kV “Ring” around Chennai
Providing reliable supply to upcoming load centers at Pugalur, Coimbatoor, Karaikudi, Tirunelveli
Strengthening of Tr. Grid in Tamil Nadu
POWERGRID’s Network in Tamil Nadu by 2007-08POWERGRID’s Network in Tamil Nadu by 2007-08POWERGRID’s Network in Tamil Nadu by 2007-08POWERGRID’s Network in Tamil Nadu by 2007-08
Thank You …Thank You …
Development of National GridDevelopment of National GridDevelopment of National GridDevelopment of National Grid
National Grid by 2012National Grid by 2012National Grid by 2012National Grid by 2012
1
DOUBLE CIRCUIT TOWER
( 45 Mtr. High)
MULTI CIRCUIT TOWER
( 70 Mtr. High)
4
2
312
9-25mtrs.
50mtrs
ROW = 85 Mts ROW = 64 Mts
Proposed 400 kV Compact Single pole tower at Delhi & Noida
Proposed Compact Single pole tower Mode :Noida
Remote Operation Of Bhiwadi S/S
Switchyard ,Bhiwadi
Control Room , Ballabhgarh
Control Room,Bhiwadi
Transmission Line Survey through GIS
Grid Disturbances
77
57
70
74
53
70
3 40 0
05
1015202530354045505560657075808590
2001-02 2002-03 2003-04 2004-05 (TillDate)Year
No
s.
Total Minor Major
9
FOREST CROSSING
Just 20 KMs in 1400 KMs Just 20 KMs in 1400 KMs through forest area…through forest area…
12
Frequency Profile of SR
47.50
48.00
48.50
49.00
49.50
50.00
50.50
51.00
25 26 27 28 29 30 31
DAYS ----->
FR
EQ
UE
NC
Y IN
HZ
---
->
2002, 2003 & 2004
320
330
340
350
360
370
380
390
400
410
420
00:0
5
01:0
5
02:0
5
03:0
5
04:0
5
05:0
5
06:0
5
07:0
5
08:0
5
09:0
5
10:0
5
11:0
5
12:0
5
13:0
5
14:0
5
15:0
5
16:0
5
17:0
5
18:0
5
19:0
5
20:0
5
21:0
5
22:0
5
23:0
5
TIME IN HRS --->
VO
LT
AG
E IN
KV
---
>COMPARISION OF BANGALORE VOLTAGE-TYPICAL DAY
BETTER VOLTAGE PROFILE MEANS LESS ELECTRICAL LOSSES
Deemed Export BenefitsDeemed Export BenefitsDeemed Export BenefitsDeemed Export Benefits
POWERGRID has to issue Project Authority certificates (PAC) to the contractors, which entitles them to the following Deemed export benefits :
Special import license @ 60% of the FOR value
Deemed export duty draw back facility
Special imprest license / advance intermediate license
Refund of terminal excise duty
Existing Transmission Network
New transmission schemes in SR