Meeting for ER-NR Synchronization on 11 th August 2006
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Transcript of Meeting for ER-NR Synchronization on 11 th August 2006
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Meeting forER-NR Synchronization
on 11th August 2006
POWERGRID, NEW DELHI
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ER-NR inter-connection through TALA transmission system
MUZAFFARPUR
GORAKHPUR
GORAKHPUR UPMOTIRAM ADDA
TOMANDAULA
LUCKNOW
BAREILLY
UNNAO
PURNEA
BINAGURI
Tala(6X170=1020 MW)
63+ 63
63
63
63
63
63
63
63
63
6350
50
50
50
144 k
m
139 k
m
160 km
242 km
261 km
246 km
70 k
m
NR ER
BHUTAN
INDIA
46
km
2X315 MVAXFMR
1X315 MVAXFMR
2X315 MVAXFMR
1X315 MVAXFMR
2X315 MVAXFMR
2X315 MVAXFMR 250
km
2X315 MVAXFMR
50
50
5050
50
To AgraTo Panki
TO BIHARSHARIF
63168 km T
OB
ON
GA
IGA
ON
TOMALDA
18
km
NR map
ER map
3
S
No.
From end
(400 kV)
To end
(400 kV)
Conductor km From end
Line
Reactor
To end
Line
Reactor
Series
compensation
1 Tala Binaguri D/C Twin Moose 144 0 0 No
2 Tala Binaguri D/C Twin Moose 139 0 0 No
3 Binaguri Purnea D/C Quad Moose 160 0 0 No
4 Purnea Muzaffarpur D/C Quad Moose 242 63 63 40 % fixed + 5 to 15 % variable
At Purnea
5 Muzaffarpur Gorakhpur D/C Quad Moose 260 63 0 40 % fixed + 5 to 15 % variable
at Gorakhpur
6 Gorakhpur Lucknow D/C Twin Moose 245 50 0 No
7 Lucknow Unnao D/C Twin Moose 74 0 0 No
8 Bareli Mandola D/C Twin Moose 237 50 0 No
9 Gorakhpur Gorakhpur D/C Twin Moose 46 0 0 No
Transmission Lines
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Preparedness for synchronization
Northern Region
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Anchoring at Lucknow (PGCIL)
LUCKNOW(POWERGRID)
1X315 MVA400/220 kV XFMR
SITAPUR
TO UNNAO(UP)
TO GORAKHPUR(POWERGRID)
CHINHAT
SHAHJANPUR
BAREILLY
TO UNNAO(UP)
TOMANDAULA
HARDOI ROAD
LUCKNOW(UP)
TO SINGRAULI
TO MORADABAD
TO SULTANPUR
TO 220 kV BAREILLI
TO UNNA0
2X240 MVA400/220 kV
XFMR
2X315 MVA400/220 kV
XFMR
TO UNCHHAR
TO UNNAO(UP)
TalaSystem
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Anchoring at Gorakhpur (PGCIL)
GORAKHPUR(POWERGRID)
50 MVAR
50 MVAR
50 MVAR
2*315 MVA400/220 kV XFMR
BASTI (UP)
TO LUCKNOW(POWERGRID)
TO MUZAFFARPUR(POWERGRID)
GORAKHPUR 220 kV (UP)
GORAKHPUR(UP)
TANDA (UP)
TO AZAMGARH
TO DEORIA
TO SULTANPUR
TalaSystem
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Elements to be made available in NR
• Contingency arrangement of 400 kV Kanpur Auraiya
• LILO of 220 kV Mainpuri-Harduaganj-I at Mainpuri(PG)
• LILO of 220 kV Mainpuri-Firozabad at Mainpuri (PG)
• 2 x 240 MVA, 400/220 kV ICTs at Obra
• 220 kV Gorakhpur(UP 400 kV)-220 kV Gorakhpur(old)-I
• Closing of loops in U.P. system
NR LineDiagram
NR Power Map
UPPower Map
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400 kV Kanpur-Agra ckt 2 by utilizing Kanpur-Auraiya
400 kV Auraiya
400 kV Kanpur
Panki400 kV Agra
To Obra
To Unnao
To Muradnagar
To Ballabgarh
To Ballabgarh
To Bassi
166 km
67 km
6 km
To Allahabad
New element
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Preparedness for synchronization
Eastern Region
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Anchoring at Muzaffarpur (PGCIL)
MUZAFFARPUR(POWERGRID)
63 MVAR
63 MVAR
63 MVAR
63 MVAR
1x315 MVA400/220 kV XFMR
FATUHA
MUZAFFARPURKanti-(BSEB)
TO PURNEA(POWERGRID)
TO GORAKHPUR(POWERGRID)
BIHARSHARIF(BSEB)
3*315 MVA400/220 kV XFMR
63 MVAR
TOTENUGHAT
TO BODHGAYA
Radial Load
TalaSystem
ER map
Bihar
Jharkhand
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Radial load on Muzaffarpur
Eastern Region
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PurneaBSEB
NepalKept Normally open
MTPS
MotihariBetiah
Ekma
ChapraSiwan
Gopalgunj
Hazipur
Muzaffarpur 220kV
Samastipur
Barauni
Biharsariff
220 kV lineCharged at 132kv
Ramnagar
Nepal
Hatidah
Not connected
2x100MVA Darbhanga
Pandaul
Sitamari
Muzf Town
Radialised Load
( 150 MW)
Madhubani
North Bihar System- prior to radialisation at Muzaffarpur
MB TB
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PurneaBSEB
NepalKept Normally open
MTPS
MotihariBetiah
Ekma
ChapraSiwan
Gopalgunj
Hazipur
Muzaffarpur 220kV
Samastipur
Barauni
Biharsariff
Ramnagar
Nepal
Hatidah
Not connected
2x100MVA Darbhanga
Pandaul
Sitamari
Muzf Town
Radialised Load
(70-80 MW)
Madhubani
MB TB
Radialisation on Muzaffarpur8th Aug 2006, 12:12 Hrs
220 kV lineCharged at 132kv
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PurneaBSEB
NepalKept Normally open
MTPS
MotihariBetiah
Ekma
ChapraSiwan
Gopalgunj
Hazipur
Muzaffarpur 220kV
Samastipur
Barauni
Biharsariff
Ramnagar
Nepal
Hatidah
Not connected
2x100MVA Darbhanga
Pandaul
Sitamari
Muzf Town
Radialised Load
( 150 MW)
Madhubani
Extension of Radial Load – 9th Aug’2006
100MVA
220 kV lineCharged at 132kv
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SUGGESTED RADIAL OPERATION WITH
1 X100MVA ICT AT MTPS -KANTI
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PurneaBSEB
NepalKept Normally open
MTPS
MotihariBetiah
Ekma
ChapraSiwan
Gopalgunj
Hazipur
Muzaffarpur 220kV
Samastipur
Barauni
Biharsariff
Ramnagar
Nepal
Hatidah
Not connected
1x100MVA Darbhanga
Pandaul
Sitamari
Muzf Town
Radialised Load
( 50-55 MW)
Madhubani
MB TB
220 kV lineCharged at 132kv
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Restoration of Outaged Elements
Eastern Region
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BiharSharif
Tenu GhatPatratu
Bodh Gaya
Dehri
Pusauli
X
To Sahupuri
Arrah
Khagol
Fatuha
To NR
3 x 315
MVA
2 x 315 MVA
To Begusarai
To Khalgaon
To Muzaffarpur
Eastern Region NetworkTala
System
ER map
Bihar
Jharkhand
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Grid Discipline
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Synchronous Interconnection of Northern Grid with Central Grid
• “Large grid” comprising of NER, ER, WR & NR• Over 250 power stations • Total installed generation capacity of 88,000 MW • Operating size of 60,000 MW• Cover 80% of the country’s area • Cater to 78 % of country’s population• Comparable to the system affected during the US
Blackout of 14th August 2003 (10 % of Eastern Interconnection)
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Paradigm shift in system operation
• Greater emphasis on –Network reliability
–Protection systems
–Grid discipline
–Handling emergencies
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Grid Discipline• Tie-line control and network loading important• Frequency might be a misleading• Overdrawals/ under drawals to be kept within safe
limits • OD/UD reflected on the ER-NR & ER-WR tie-
line flows.• Ramping up and ramping down of generation,
switching in and out of loads have to be done gradually
• RLDC instructions to be followed
States
Generators
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Protection System
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S No. Date Time Description of loss/ tripping
1 14th April 05 1135 2100 MW at Kota + Suratgarh
2 21st April 05 2047 1400 MW Anpara
3 28th Apr 05 1530 Talcher-Kolar
4 17th May 05 1253 1335 MW at Jhakri + 300 MW Baspa + 1200 MW Suratgarh = Total 2835 MW
5 19th Jun 05 1359 350 MW at NAPS
6 06th July 05 0123 1350 MW at Dadri complex + HVDC Bipole
7 25th August 05 1321 1100 MW Anpara + 500 MW Obra
8 31st Aug 05 1530 Talcher-Kolar
9 11th Sep 05 1247 800 MW at Dadri (Th)
10 17th Nov 05 0413 488 MW Auraiya
11 26th Nov 05 0340 400 MW at Bhatinda
12 2nd Jan 06 0225 600 MW Ropar
13 10th Jan 06 2327 Western Grid Separation
Major Trippings incidents
Three large incidents have occurred in 2006-07 in Northern Region
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• Suggested UFR settings– NR & WR
• 1st stage : 48.8 Hz, instantaneous
• 2nd stage: 48.6 Hz, instantaneous
• 3rd stage: 48.2 Hz, instantaneous
– ER (No change)• 1st stage: 48.5 Hz, instantaneous
• 2nd stage 48.2 Hz, instantaneous
• Settings of df/dt relays in WR & NR to be reviewed
Defence Plans
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Optimal/Continuous use of Inter-regional radial links
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Bhutan
North EasternRegion
Eastern
Region
Northern Region
Western Region
Southern Region
Pusauli B/B HVDC
Vin
dh
yach
al B
/B H
VD
C
Bh
adra
vati
B/B
HV
DC
Gazuwaka B/B HVDC
Talchar-Kolar bi-pole HVDC
220 kV Sahupuri-Pusauli
Up
per
Sil
eru
-Bal
imel
a
220
kV C
hikh
odi-
Kol
hapu
r
220
kV
Ujj
ain-
Kot
a/M
orak
220
kV M
alan
pur-
Aur
aiya
400 kV Raipur-Rourkela
220 kV Korba-Budhipadar
400 kV Gorakhpur-Muzaffarpur
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Handling Contingencies
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Impact of loss of 1800 MW generation in NR
25000 MWNR Grid
10000 MWER-NER Grid
No primary responseFrequency drop of 1 HzReduction in NR load by 750 MWFlow on ER-NR interconnector = 1800 MW-750 MW = 1050 MW
Equivalent to reduction in ER+WR+NER Grid load by 1050 MWContribution from WR = 750 MW
25000 MWWestern Grid
1050 MW
750 MW
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Impact of loss of 1800 MW generation in WR
25000 MWNR Grid
10000 MWER-NER Grid
No primary responseFrequency drop of 1 HzReduction in WR load by 750 MWFlow on ER-WR interconnector = 1800 -750 = 1050 MW
Equivalent to reduction in NR + ER Grid load by 1050 MWContribution from NR = 750 MW
25000 MWWestern Grid
1050
MW
750 MW
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Thank You !