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HVDC for Cross Border
Power Transmission
OOMMEN CHANDY
Executive Director HVDC
POWERGRID CORPORATION OF (I) LTD
Advantages of HVDC
• Why HVDC Transmission? – Asynchronous link
– Long distances make HVDC cheaper
– Less Right of Way for HVDC line
– Improved link stability
– Fault isolation
Cost comparison of ac and dc transmission
Cost of DC terminal
Cost of AC terminal
Cost
Break even distance
Distance in km
Cost of AC Line
Cost of DC Line
500 – 700 km
Controls for Link Stability
• Active Power Control
• Reactive Power Control
• Frequency Control
• Islanded Mode Operation
• Power modulation
• Power Limit functions / Run Back Controls
Transmission line or cable
Converter
Smoothing reactor
DC filter
Telecommunication
Control system
AC filters
Shunt capacitors
or other reactive
equipment
AC bus
~~
A Typical Converter Station
Different component of HVDC Terminal
Existing HVDC in INDIA 1 – Rihand-Dadri (+/- 500
kV,1500MW)
2 - Vindyachal (2 X250 MW)
3 - Chandrapur-Padghe (+/- 500kV,1500 MW) MSTCL
4 - Chandrapur-Ramagundam (2 X 500MW)
5 – Barsoor-Lower Sileru (100 kV,100MW)
6 – Gajuwaka (1 X 500 MW + 1 X 500 MW )
7 - Sasaram (1 X 500 MW )
8 - Talcher-Kolar ((+/- 500 kV, 2000MW, upgraded to 2500 MW)
9- Ballia-Bhiwadi (+/- 500 kV, 2500MW)
10- NER-Agra (+/- 800 kV, 6000 MW , Multi-Terminal ,under execution)
11. Mundra- Mahendergarg (+/- 500 kV, 2500MW) Adani
Mundra
ADuar
• Improving Reliability and pooling reserves
• Reduced Investment in generation capacity
• Improving load factor and increasing load diversity
• Economies of scale in new construction
• Diversity of generation mix and supply security
• Economic exchange
• Environmental dispatch and new plant siting
• Coordination of maintenance schedule 11
Benefits for Regional Interconnection
Common Features of SAARC Countries
• Abundant reserves of Natural resources
• Low per capita electricity consumption
• Fast Growth in Demand & deficit of Power in some
countries
• Common nominal frequency of operation
• Similar voltage classes
12
15
Interconnection between
India & Bangladesh Grids
• Purpose : –Exchange of Power
between India and Bangladesh
• Interconnection :
–Baharampur(India)-Bheramara(Bangladesh) 400kV D/c line
–500MW HVDC B/b stn at Bheramara(Bangladesh)
• Type of connection : –Asynchronous(HVDC)
• Transfer Capacity : – 500MW (upgradable to
1000MW)
GOALPARA33.2 MVA
KHULNADOMJUR
LILUAH
HOWRAH(WB)
JOKA
BUDGEBUDGE
SOUTHERN
BARIPADA
HALDIATAMLUK
FALTA
KOLAGHAT
KRG'PUR(D)
ULUBERIA
KOLAGHAT(D) HWH(D)
HM
LEGEND
BHOLAGALLAMARI
LAKSHMIKANTOPUR
SUBHASGRAM
BASIRHATSONARPUR
KASBA
MANGLA13.3 MVA
SOUTH
SATKHIRA
BHANDARIA13.3 MVA
26.6 MVABAGERHAT
KAWKHALI
PATUAKHALI40 MVA
BARISAL82 MVA
230/220kV
EXISTING
132kV
FUTURE
BANDARBAN
20 MVA
COX'S BAZAR
RAUJAN
JULDAH
SHAHMIRPUR
126 MVA
Bay of Bengal
HALISHAHAR167 MVA
BURHANUDDIN
63 MVA
82 MVA
HATHAZARI
BAROAULIA
KULSISIKALBAHA
80 MVA
41 MVA
DOHAZARI
CHANDROGHONA26.6 MVAMADANHAT
82 MVA
KAPTAI
LUNGSEN
TENGA
NBU
LDTEESTA
RAIGANJ
GANGARAMPUR
DALKHOLA(WBSEB)
CH. NAWABGANJ40 MVA
SAGARDIGHI
RAGHUNATHGANJ
DEBAGRAM
KRNAGAR
RANAGHAT
TITAGARH
DPL
ARAMBAG
ARAMBAGBURDWAN
RISHRA
BELMURI
KHANYAN
BTPS
DURGAPUR
NAGARBIDHAN
MANKAR
BOLPUR
SATGACHIA
KATWA
DHULIAN
RAMPURHAT
BAKRESHWARSAITHIA
GOKARNA
FARRAKA
KHEJURIA
PURNEA
KAHALGAON
MALDA
SAMSI
DALKHOLA
KATIHAR
PURNEA(BSEB)(WBSEB)DALKHOLA
LEBONG
RAMMAM
JOYDEVPUR
GHORASAL
ASHUGANJ
MEGHNAGHATMAGURA
40 MVA
KHULNA CENTRAL192 MVA
NOAPARA
BONGAON
JEERAT
ASHOKNAGAR
DHRMPR
BARASAT
KALYANI JESSORE80 MVA
CHUADANGA
JHENAIDA40 MVA
BOTTAIL82 MVA
MADARIPUR26.6 MVA
GOPALGANJCHANDPUR
40 MVA
AMINBAZAR
FARIDPUR40 MVA
MANIKGANJ41 MVA
HASNABAD
MIRPUR
KALYANPUR
TONGI
ULLON
BASUNDHARA
BOGRA82 MVA
40 MVA
SHAHJAD
SIRAJGANJ
PUR40 MVA
BHERAMARA16.6 MVA
ISHURDIBEHRAMPUR
BEHRAMPUR
53 MVARAJSHAHI
82 MVAPABNA
NATORE40MVA
NIAMATPUR NAOGAON82 MVA
BOGRASOUTH
SRIPUR(MODHUPUR)
TANGAIL82 MVA
BAGHABARI
KABIRPUR82 MVA
68 MVA
JAMALPUR82 MVA
82 MVAMYMENSINGH
JIRIBAMKOLASIB100 MVAKHOWAI
TRIPURA
CHOWMOHANI
82 MVA
COMILLA
82 MVASOUTH
FENI40 MVA
40 MVA
COMILLANORTH
AGARTALAHARIPUR
SIDDHIRGANJ
RAMPURAGPP
AGARTALA
AMBASSA
W.PHAILENG
RANGAMATI
KHAGRACHARI
LUNGLEI
MARPARA
SERCHIP
(ZEMABAWK)
MIZORAM
AIZWAL
AIZWAL
EASTKANCHANBARI
KISHORGANJ
20 MVASHAHJIBAZAR
50 MVA
B. BARIA
B BARIA
40 MVA
KAMALPUR
SREEMONGAL
40 MVA
NETROKONA40 MVA
SYLHET
DULLABCHERA
KAILASHAHAR
KUMARGHAT
DHARMNAGAR
BADARPUR
PANCHGRAM
FENCHUGANJ
33 MVA
SYLHET40 MVA
JIRIBAM
PILAPOOL
BONGAIGAON
ASSAM
BORNAGAR
40 MVA
LALMONIRHAT
PALASHBARI
JOYPURHAT
BALURGHAT40 MVA
82 MVASAIDPUR
33.4 MVA
BOROPUKURIA
PURBASADIPUR
(2x41+1x20) MVATHAKURGAON
RANGPUR82 MVA
TURA
ALIPURDUAR
SILIGURI
MOINAGURI
PANCHAGARH
BIRPARA
MELLI
BIRPARA(WB)
GOSAIGAON
DHALIGAON
AGIA
SALAKATI
SINGIGAON
CHUKHA
GUWAHATI
NEHU
KYRDEMKULAIUMIAM-4
MEGHALAYANANGAL
BIBRA
40 MVACHATTAK
CHERRAPUNJI
SHILLONG
LONGPI
UMTRU
UMIAM
CHANDRAPUR
KHLIEHRIAT
KHLIEHRIAT
KHANDONG
HAFLONG
KOPILI
BYRNIHAT
JAGIROAD
UMRANGSO
NECHIPHU
RANGIA
AMINGAON
ROWTA TEJPUR
SAMAGURI
MARIANI
BALIPARA GOHPUR
POWER MAP OF BANGLADESH AND INDIA
GANGTOK
RANJIT
TEESTA-VTALA
LHAO
KAMENGKHUPI
SURYAMANINAGAR
SILCHAR
400kV at 132kV
PALLATANA
AZARA
16
BOGRASOUTH
BHERAMARA
NAOGAON
NIAMATPUR
FARRAKA
SUBHASGRAM
KATWA
GOKARNA
JEERAT
KHULNA(SOUTH)
BOTTAIL
BAHARAMPUR
CH. NAWABGANJ
RAGHUNATHGANJ
KA
HA
LG
AO
N
SAGARDIGHI
RAJSHAHI
BAHARAMPUR
ISHURDI
NATORE
KHEJURIA
FARIDPUR
BAGHABARI
GHORASAL
MA
DH
OP
UR
SHAHJAD
PABNAPUR
SIRAJGANJ
BOGRA
INTERCONNECTION BETWEEN INDIA AND BANGLADESH GRIDS
400 kV230 kV132 kV
THE PROJECT
LEGEND
BAKRESHWAR
KOLAGHAT
BANGLADESH
INDIA
400kV D/c
(400 KV)
MALDA
DHULIAN
DURGAPUR
Existing
Under Constr. / Future
JAYPURHAT BARAPUKURIA
17
India & Bangladesh Interconnection
• MOM signed between Indian Delegation and BPDB & PGCB officials, Bangladesh on November 24, 2009 at Dhaka.
• Executing Agency :
– Indian portion : POWERGRID, India
– Bangladesh portion : PGCB (Power Grid Company of Bangladesh Ltd.), Bangladesh.
• Cost Estimate :
– India Portion : Rs. 169.86 Crore (USD 37.75 million)
– Bangladesh Portion : Rs. 736.84 Crore (USD 163.75 million)
• Commissioning Schedule : July, 2013
India - Bhutan : Future Scenario • Hydro Potential : About 21000 MW
• Major Hydro power addition – By 2020 : 11777 MW (from 14 HEP) – By 2030 : 26500 MW (from 75 HEPs) (addition of 14720MW
from 61HEPs)
• Major Projects by 2020
19
Sl No
Project Capacity Commissioning
1 Punatsangchu-I 1200 2015
2 Punatsangchu-II 990 2017
3 Sunkosh 4000 2020
4 Wangchu 600 2019
5 Bunakha 180 2020
6 Amochhu 620 2018
7 Dagachhu 114 2015
8 Mangdechhu 720 2017
9 Nikachhu 210 2020
10 ChamKharchu-I 670 2018
11 Kuri-Gongri 1800 2020
12 Kholongchu 600 2018
India – Bhutan : Transmission system from future Projects
• Major portion of power from the future generation projects
in Bhutan is envisaged to be imported into Indian grid.
• 4 no of high capacity 6000MW HVDC corridors to deficit
regions of India required
– 2 nos HVDC Corridors upto 2020 (from Alipurduar and Sunkosh)
– 2 nos HVDC Corridors beyond 2020
• The 1st of the 3000MW HVDC terminal being established at
Alipurduar along with 6000MW NER-NR/WR interconnector)
– Would take care of evacuation from projects like Punatsangchu-I(1200MW), Punatsangchu-II(990 MW) & Mangdechu(720MW)
– To be commissioned in 2014-15. 20
23
India - Pakistan Discussions were held in 1998-
99 for exchange of power between India and Pakistan
To start with, 220kV interconnection was envisaged for transfer of 300MW from Pakistan to India
– Dinanath – Firozpur 220kV line
In the long term, HVDC interconnections was envisaged for bulk power exchange (upto 2000MW)
• Installed Capacity : 2684
MW
(Hydro – 45%, Thermal-
55% )
• Maximum Demand :
2200MW
• Demand Growth : 8 %
• Hydro potential : 2000
MW out of which 1200 MW
already harnessed
EMBILIPITIYA
MATARA
GALLE
DENIYAYA
SAMANALAWEWA
BALANGODA
MATUGAMA
PANADURA
RANTEMBE
RANDENIGALA
VICTORIA
INGINIYAGALA
AMPARA
BOWATENNA
UKUWELA
KIRIBATHKUMBURA
KOTMALE
WIMALASURENDRA
BADULLA
N'ELIYA
MADAMPE
BOLAWATTA
THULHIRIYA
KURUNEGALA
VEYANGODA
BIYAGAMA
ORUWALA
KOLONNAWA
KOTUGODA
RATMALANA PANNIPITIYA
TRINCOMALEE
ANURADHAPURA
PUTTALAM HABARANA
RATMALANA
PANNIPITIYA
ORUWALA
BIYAGAMA
FORT
KOLLUPITIYA
KELANITISSA
KOLONNAWA
S'KANDA
132kV : Underground Cable
132kV Line
220kV Line
POLPITIYA
NEWLAXAPANA
CANYON
KELANIYA
KOTUGODA
SAPUGASKANDA
KELANITISSA
KHD
KOSGAMA
VAVUNIA
POLONNARUWA
HAMBANTOTA
LAKDANAWI
LAXAPANA
SITHAWAKA
220/132 kV Sub Station
132kV GS
Hydro Power Station
Thermal Power Station
NEW ANURADHAPURA
Sri Lanka Transmission System
BARGE PS
CHUNNAKAM
KILINOCHCHI
VALACHCHANAI
132kV Line (not in operation)
25
Sri Lanka : Present Power Scenario
India – Sri Lanka HVDC interconnection
26
MoU Signed between GoI & GoSL for feasibility study to be carried out by
POWERGRID and CEB
Executing Agency : POWERGRID (India) & CEB (Sri Lanka)
Proposed Interconnection :
India(Madurai) – Sri Lanka(Anuradhapura) HVDC bipole line : 360 km
(Stage-I : 500MW; Stage-II : 1000MW)
Indian Territory : (Scope :POWERGRID) : 130 km
Sea Route : (Scope : POWERGRID) : 120km
Sri Lankan Territory : (Scope : CEB) : 110 km
Tentative cost : Rs. 3900 Cr. (USD 867 Million)
Rs. 3300 Cr. (USD 645 Million) (Stage-I)
Rs. 1700 Cr (USD 222 Million) (Stage-II)
Feasibility Study Report under final stage
VSC Technology of HVDC is under consideration.
Conventional LCC HVDC VSC HVDC
•High power capability - 6000 MW Lower power capability -1200 MW
•Good overload capability •Weak overload capability
• Requires stronger AC systems • Operates into weaker AC systems
• Generates harmonic distortion,
AC & DC harmonic filters required
• Insignificant level of harmonic generation,
hence no filters required
• Coarser reactive power control • Finer reactive power control
Large site area, dominated by harmonic filters • Compact site area, 50 – 60% of LCC site area
No ‘black start’ capability •“Black” start capability
• Requires converter transformers • Only conventional transformers
•Lower station losses ( ~~1.5% for both terminals) •Higher station losses ( ~ 2% for both terminals)
•Lower cost •Higher cost by 10 – 15%
•Higher reliability Lower reliability
• More mature technology •Less mature technology
•Power is reversed by changing polarity of the
converters •Power is reversed by changing direction of current
flow
• Requires use of MI cables
− Higher voltage capability
• Ideal for use with XLPE cables
− Lower voltage capability
COMPARISON
Indo-Srilanka HVDC Connection Link
• ± 400 kV, 4 x 250 MW HVDC Bipole Transmission Link
• From Madurai (India) to Sri Anuradhapura (Sri Lanka)
• Project having Overhead line (app 334 km) and Submarine Cable ( app 90 Km)
India Sri Lanka Sea
Submarine Cable
Overhead line Overhead line
Transmission System in the Sea Route : Submarine Cable
Transition Stn
130 Kms
120 Kms
110 Kms
Proposed Route for Interconnection
Madurai-New
Panaikulam
New Anuradhapura
Taliamannar
Thirukketiswaram *
48 Kms
Madurai
India – Sri Lanka Interconnection
Madurai
Panaikulam
New Anuradhapura
Thirukketiswaram
Proposed Route for India – Sri Lanka Interconnection
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