largest sized hydro unit (180 mw at chamera) in the country

Largest sized hydro unit (180 MW at Chamera) in the country

Salient FeaturesNorthern Regional Power System

WelcomeCONTINGENCY PLAN

FOR

NORTHERN GRID

PROBABLE CONTINGENCIESIN NORTHERN GRID

Outage of Rihand – Dadri HVDC Pole (s)

Outage of 400 kV circuit (s) in parallel AC network through UP

Outage of Trunk Lines between UP and BBMB systems


Critically Low System Frequency Conditions

Critically Low Voltage Conditions

Critically High System Frequency Conditions

Critically High Voltage Conditions


System Instability / Hunting

Outage of 400 kV Dadri – Mandola Circuit (s)

Disturbance / Trippings in J&K System

PREVENTIVE MEASURES


Monitoring & Control of line loading in parallel AC network

Eastern to Central UP:

400 kV Singrauli – Lucknow (PG) 400 kV Singrauli – Allahabad – Kanpur – 1 (PG) 400 kV Singrauli – Allahabad – Kanpur – 2 (PG) 400 kV Vindyachal – Kanpur (PG) 400 kV Obra – Panki (UPPCL) 400 kV Anpara – Unnao (UPPCL) 400 kV Obra – Sultanpur – Lucknow (UPPCL)

PREVENTIVE MEASURES


Monitoring & Control of line loading in parallel AC network

Central to Western UP :

400 kV Kanpur - Ballabgarh (PG) 400 kV Kanpur - Agra (PG) 400 kV Panki - Muradnagar (UPPCL) 400 kV Unnao – Agra - Muradnagar (UPPCL) 400 kV Lucknow - Moradabad (UPPCL)

PREVENTIVE MEASURES


Exporting power to Western / Eastern Region.

Reducing Generation in Eastern Side and increasing in Western Side.

Restricting Load in Western Side of the Grid.

Carrying out Load shedding in specific areas.

PREVENTIVE MEASURES


These trunk lines are

• 400 kV Dadri – Panipat• 400 kV Dadri – Malerkotla• 400 kV Bassi – Hissar• 400 kV Bawana – Hissar• 400 kV Bawana –Bhiwani - Hissar

PREVENTIVE MEASURES


In the event of the above contingency,

Generation in UP system may be reduced and in BBMB system may be increased.

Load reduction to be carried out in BBMB system. Power may be exported to WR / ER.

Support from hydro units at BBMB, Chamera and RSD.

PREVENTIVE MEASURES

Critically Low System Frequency Conditions


Generation to be stepped up.

Import from neighboring regions.

Load regulatory measures by all states.

Disconnection of Radial Load / ICTs.

Additional support from reservoir based hydro units.

PREVENTIVE MEASURES Critically Low Voltage Conditions


Activation of requisite capacitors & load regulation to curtail VAR drawals from the Grid.

Maximisation of VAR generation particularly at Load Centre Locations.

Improvement of voltage at super grid level by transformer tap changing.

Load shedding in specific pockets / areas.

PREVENTIVE MEASURES

Critically High System Frequency Conditions In the event of the above contingency,

Export power to other regions.

Backing down the generating stations.

Closing down of some of the generating units based on merit order.

PREVENTIVE MEASURES

Critically High Voltage Conditions


Bus Reactors / Line Reactors to be taken in to service.

Switchable capacitors are to be taken out.

Generating Units to absorb VARs to the extent possible.

Switching off lightly loaded lines.

PREVENTIVE MEASURES

Outage of 400 kV Dadri – Mandola Circuit (s) In the event of the above contingency,

Delhi’s load at Bawana / Bamnauli to be shifted to BTPS side / curtailed.

Delhi’s load at Mandola / Narela to be shifted to Panipat side / curtailed.

HVPNL load at Abdullapur / Sahibabad to be shifted to Panipat / curtailed.

PREVENTIVE MEASURES

Outage of 400 kV Dadri – Mandola Circuit (s)

Additional load shedding in Delhi, Haryana, Rajasthan & Punjab area.

Additional generation at BBMB stations / Chamera / RSD.

Out-feed from Dadri to be reduced by regulating Rihand – Dadri HVDC flow / generation at Dadri.

Condition Monitoring of critical circuits / ICTs

PREVENTIVE MEASURES TO MAINTAIN GRID IN HEALTHY CONDITION

Operation of under frequency and df/dt relays

Protection Co-ordination

PLCC Channels

Real Time Data Telemetry

Sl.No

Lines/ICT’s Action by Action

1. 400 KV Kanpur -Ballabhgarh

HVPNRRVPNDTL

Load shedding in and around BallabhgarhLoad shedding in Northern RajasthanLoad shedding in South Delhi

2. 400 KV Kanpur - Agra

HVPNRRVPNDTL

Load shedding in and around BallabhgarhLoad shedding in Northern RajasthanLoad shedding in South Delhi

3. 400 KV Panki -Muradnagar

UPPCLUPCL

Load shedding in Western UPLoad shedding around Rishkesh (Garhwal area)

4. 400 KV Dadri -Muradnagar

UPPCLUPPCL

Load shedding in Western UP area.Load shedding around Rishikesh (Garwhal area)

5. 400 KV Unnao - Agra UPPCL Load shedding in Western UP

6. 400 KV Lucknow -Moradabad

UPPCLUPCL

Load shedding in Western UPLoad shedding in and around Haldwani and Rishikesh (Garhwal and Kumaon areas)

DETAILS OF LOAD SHEDDING IN SPECIFIC AREAS IN ORDER TO REDUCE LOADING ON DIFFERENT CIRCUITS

Continued..


7. 400 KV Agra - Bassi RRVPNHVPN

Load shedding in Northern Rajasthan Load shedding in Southern Haryana

8. 400 KV Ballabhgarh -Bassi

RRVPNHVPN

Load shedding in Northern RajasthanLoad shedding in Southern Haryana

9. 400 KV Dadri -Panipat

HVPNRRVPNDTL

Load shedding in and around PanipatLoad shedding in Northern RajasthanLoad shedding in and around Narela (When Narela being fed from Panipat)

10. 400 KV Dadri -Mandola

DTL HVPN RRVPN

Load shedding in Northern Delhi and Western DelhiLoad shedding in Northern Haryana (in and around Abdullapur)Load shedding in Northern Rajasthan

11. 220 KV Ballabhgarh - BTPS *

DTLRRVPN

Load shedding in South Delhi and NDMC areaLoad shedding in and around Alwar

Continued..


12. 220 KV BTPS - IP Extn.

DTL Load shedding around UP and in New Delhi area

13. 220 KV Mandola -Patparganj

DTL Load shedding in East Delhi area.

14. 220 KV Samaypur -Charkhi-Dadri

HVPNRRVPN

Loading shedding in Southern HaryanaLoad shedding in Northern Rajasthan

15. 220 KV Ballabhgarh -Charkhi Dadri

HVPNRRVPN

Load shedding in Southern HaryanaLoad shedding in Northern Rajasthan

16. 220 KV Kishenpur -Pampore **

J & K Load shedding in Valley area

* During the time when direction of power flow is from Ballabgarh to BTPS end. ** During the time when direction of power flow is from Kishenpur to Pampore

DETAILS OF LOAD RADIAL FEEDERS / ICTs IN DIFFERENT STATES FOR GETTING LOAD RELIEF IN THE EVENT OF A

CONTINGENCY

Continued..

State Controlling State/

Agency

Feeder / ICTs Details Normal Load

DTL BBMBPOWERGRDNTPCUPPCL

D1, D2 and D3 feeders from Rohtak Road220 kV Mandola-Gopalpur I & Gopalpur-II220 kV BTPS-Okhla-I and Okhla-IILoad to Ghazipur from Noida

100 MW220 MW300 MW 50 MW

UPCL

UPPCLUPPCL

132 kV Dohna-Kiccha S/C220 kV C.B.Ganj-Haldwani S/C

40 MW80 MW

PSEB BBMBBBMBBBMBBBMBBBMB

3 Nos. of 220/66 kV ICTs at Jamalpur2 Nos. of 220/132 kV ICTs at Jamlapur2 Nos. of 220/66 kV ICTs at Jallandhar2 Nos. of 220 /132 KV ICTs at Jallandhar3 Nos. of 220/66 KV ICTs at Sangrur

80 MW50 MW40 MW60 MW30 MW

HPSEB BBMB BBMB/NHPC

220 kV Dehar-Kangoo and 132 kV Dehar-Kangoo220 kV Pong-Jessore , 220 kV Bairsiul-Jessore & 220 kV RSD -Jessore

100 MW 80 MW

DETAILS OF LOAD RADIAL FEEDERS / ICTs IN DIFFERENT STATES FOR GETTING LOAD RELIEF IN THE EVENT OF A

CONTINGENCYJ&K PSEBPSEBNHPC /PSEB POWERGRID/ PSEBPOWERGRID

66 kV Pathankot-Kathua66 kV Sarna-Kathua220 kV Salal-Jammu D/C and 220 kV Sarna-Hiranagar220 kV Kishenpur-Udhampur & 220 kV Sarna-Udhampur220 kV Wagoora-Ziankote

8 MW6 MW250 MW 120 MW 140 MW

HVPN POWERGRIDBBMBBBMBBBMBBBMB BBMBBBMBBBMBHPSEBBBMBBBMB BBMBBBMBBBMB

220 kV Abdullapur-Shabad D/C220 kV Dadri-Narnaul S/C220 kV Dadri-Riwari S/C220 kV Samaypur-Palwal D/C132 kV Panipat-Sonepat & 132 kV Narela-Sonepat132 kV and 33 kV feeders from Panipat132 kV and 33 kV feeders from Kurukshetra220 /132 kV ICT #2 at Dadri (BBMB)132 kV Giri-Abdullapur220/132 kV ICT# at Hissar220/66 kV ICT-I & ICT-2 at Jagadhari /66 kV feeders from Jagadhari66 kV feeders from Dhulkote66 kV Rohtak Road-Gurgaon D/C220 kV Samaypur-Badshahpur D/C

120 MW60 MW80 MW50 MW40 MW 120 MW60 MW35 MW40 MW50 MW80 MW 15 MW40 MW120 MW

UT Chandigarh

HVPNL 66 kV Pinjore-Chandigarh (Sector-29) D/C 40 MW

ACTION DURING LOW VOLTAGE CONDITIONSSr.

No.Sub-Station Min. Bus

voltageAction

ByAction

1. Dadri 400 kV (NTPC)

360 KV DTL

HVPN

UPPCL

Load shedding in and around Gopalpur, Subzi Mandi, Narela, Rohtak Road, Rohini, Shalimarbagh, Patpargarnj, Kashmere Gate, Bawana, Najafgarh, Bamnauli and surrounding areas.Load shedding in and around Panipat and Ballabhgarh.Load shedding in and around Muradnagar, NOIDA, Sahibabad, Meerut, Modipuram, Simbholi, Khurja and surrounding areas.

2. Panipat 400 kV

360 KV HVPN

DTL

Load shedding in and around Panipat and BallabhgarhLoad shedding in and around Narela (When Narela being fed from Panipat)

3. Muradnagar400 kV

360 KV UPPCL

DTL

UPCL

Load shedding in and around Muradnagar, NOIDA, Sahibabad, Meerut, Modipuram, Simbholi, Khurja and surrounding areas.Load shedding in and around Patparganj, Ghazipur and surrounding areas (if connected from Sahibabad)Load shedding in and around Rishikesh and Haldwani.

ACTION DURING LOW VOLTAGE CONDITIONS

4. Bassi400 kV

360 KV RRVPN

HVPN

Load shedding in and around Jaipur and other areas in Northern RajasthanLoad shedding in and around Hissar and Ballabhgarh

5. Ballabhgarh400 kV

360 KV HVPN

RRVPNDTL

Load shedding in and around Dadri (BBMB), Badshahpur, Palwal and BallabhgarhLoad shedding in Northern RajasthanLoad shedding in South Delhi

6. Wagoora400 kV

360 KV J & K Load shedding in Valley area in J&K

7. NAPS 220 kV

180 KV UPPCL

UPCL

Load shedding in and around Moradabad, Muradnagar Simbholi, Meerut, Modipuram, Khurja, Sahibabad.Load shedding in and around Rishikesh and Barelley

ACTION DURING LOW VOLTAGE CONDITIONS8. BTPS

220 kV180 KV DPSC Load shedding in and around Okhla,

Mehrauli, Patparganj, IP, Rajghat, Lodhi Road and Sarita Vihar

9. Moga220 kV

180 KV PSEB Load shedding in and around Moga, Ferozpur, Jagraon, Laltokalan.

10. Jammu220 kV

180 KV J & K Load shedding in Jammu area in J&K

In order to minimise / avert low voltage conditions these are to be ensured:

The capacitor banks are kept in service.

The generating units at Load Centre locations are generating maximum possible VARS.

Wherever possible the hydro units are operated in Synchronous Condenser mode and generating VARS.

The transformer tops are optimally selected.

largest sized hydro unit (180 mw at chamera) in the country

Documents

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