report dated 5th may 2018 at 15:00hrs - posoco

1

POWER SYSTEM OPERATION CORPORATION LIMITED

NATIONAL LOAD DESPATCH CENTRE

B-9, QUTUB INSTITUTIONAL AREA

NEW DELHI – 110016

Report dated 5th May 2018 at 15:00hrs

Sub: Load crash occurred in Northern Region due to thunderstorm on the night of 2nd

and 3rd May 2018

On 2nd May 2018, due to thunderstorm & dust storm, tripping of multiple 765 kV and

400 kV lines took place and around 14GW load crash has occurred in Northern region.

In this connection, flash report prepared by NLDC and NRLDC is enclosed at Annexe-I

and Annexe-II respectively. The current status of elements tripped in northern region is

enclosed as Annexe-III.

In continuation of the above report, the information regarding restoration of important

lines /ICTs/Bus which went under outage on 2nd May 2018 due to the dust/thunder

storm is given below.

S.No. Name of Element Outage date & Time Restoration date & time

1. 765/400KV ICT-1 at Agra 02-05-2018

(20:33)

18:03

(04.05.18)

2. 765/400KV ICT-2 at Agra 02-05-2018

(20:34)

19:33

(04.05.18)

3. 765 KV Agra – Gwalior line – 2 20:32

(02.05.18)

02:38

(05.05.18)

4. 765 KV Agra Bus-1 &2 02-05-2018

(20:34)

00:02

(05.05.18)

2

In addition to the above, tower collapse has been reported due to the dust and

thunderstorm on 2nd May 2018 and earlier events on 11th April 2018 and 27th April

2018. The details of outages of trunk elements which are still under outage as on date

are given below:

S.No. Name of Element Tripping Time Reason of Outage/Remarks 1. 765kV Agra-Jhatikara line 18:29 (11.04.18) Line was already under breakdown due to

Tower damage from Loc. No. 173 to 177 since 11th April 2018. Further 03 nos. of towers damaged on 2nd May 2018 due to thunderstorm.

2. 765kV Agra-Fatehpur-1 20:34 (02.05.18)

Conductor damaged between loc. no 683 to 684 due to collapse of nearby tower of MTDC BNC- Agra.

3. 765kV Agra-Fatehpur Ckt-II 20:33 (02.05.18)

Switchyard equipments damaged at Agra

4. 765 KV Agra Gwalior line I 20:32 (02.05.18

9 Nos Tower collapsed near Agra(PG) on 2nd May 2018

5. 765 KV Agra – Aligarh line 20:32 (02.05.18)

4 Nos. of tower collapsed near Agra station on 2nd May 2018

6. 765 KV Kanpur – Varanasi line - 2 1:49 (03.05.18)

1 No Tower collapse at 22.1KM from Kanpur end

7. 765 KV Kanpur – Varanasi line - 1 9:00 (03.05.18)

Being a double circuit tower, due to tower collapse at 22.1KM from Kanpur end; Circuit-1 is opened on emergency basis

8. 400 kV Agra – Kanpur 22.23 (02.05.18)

One no. of tower partially damaged

9. 765 kV Bilaspur-Dharamjaygarh-S/c

18:02 (27.04.18)

Tower Collapse at locations 121 & 122

10. HVDC Vindhyachal back to back Block-2

14:55 (26.11.17)

Differential protection operated.

3

Due to high temperature weather condition, the all India demand is in increasing trend

which is in the range of 148 GW and 152 GW during the day time.

Meanwhile IMD has issued the notice for 05/05/2018 regarding dusty winds, thunder

storm /dust storm in N.E states, West Bengal, JK, HP, Uttarkhand, Punjab and

Rajasthan. Alert has been issued to all RLDCs/States/Constituents/Transmission

licensee/DISCOMS from NLDC. Planned transmission outages are being rescheduled on

trunk corridors; Total Transfer Capability (TTC) has been reduced towards Northern

Region considering the above outages besides limitations on HVDC Mundra-

Mohindergarh bipole loading due to almost NIL generation at APL Mundra and

frequent tripping on the 3000 MW HVDC Champa-Kurukshetra bipole.

SCE,NLDC

1

POWER SYSTEM OPERATION CORPORATION LIMITED

NATIONAL LOAD DESPATCH CENTRE

B-9, QUTUB INSTITUTIONAL AREA

NEW DELHI - 110016

Flash Report

1. Date and time of the Incident: Thunderstorm & Heavy rain related tripping near Agra and

adjoining areas during intervening night of 02nd -03rd May 2018.

2. System Conditions: Load crash of around 13000 MW occurred (difference with all India

demand of previous day) due to thunderstorm and heavy rain, 765kV Agra s/s went under

complete outage due to tripping of lines.

Affected Area – Northern region, Western region and Eastern region. Railway traction load

supplied from Auraiya station affected briefly.

Demand plot of All INDIA Demand of 01st & 02nd May 2018 is given below .

01st May 2018

02nd May 2018 Reduction of

13000 MW

Annexe-1

2

The major impact was on northern region demand and demand plot of Northern region of 01st &

02nd May 2018 is given below .

The faults observed in transmission lines were captured in voltage plot of Phasor Measurement

Unit (PMU) as corresponding dip in voltage and the same is reflected in PMU voltage plot of

Agra station. The one hour PMU plot from 2000 hrs to 2100 hrs of Agra is given below.

Fig: PMU voltage plot of 400 kV Agra station

01st May 2018

02nd May 2018

Reduction

3

The frequency has remained above most of the time during inclement weather. Frequency plot

from 20:00 Hrs (02-05-18) to 08:00 (03-05-18) Hrs is given below

3. Details of tripping: During the storms, it is reported that many equipments in 765 kV Agra

substation have got damaged there by affecting the power flow. Total of 87 transmission lines of

voltage level 220 kV and above tripped in the intervening night of 02nd -03rd May 2018 due to

heavy thunderstorm in northern region, western region and eastern region. The same is tabulated

below.

Number of line tripping in the night of 02nd -03rd May 2018

Region 765 kV line 400 kV line 220 kV line HVDC Line Total

Northern

Region

8 47 5 0 60

Western

Region

3 6 1 0 10

Eastern region 0 7 0 0 7

Inter-regional

lines

4 2 1 3 10

Total 15 62 7 3 87

The Railway traction supply was also affected in the incident due to tripping of lines from Agra

station. The traction supply from 400/220 kV Auraiya station was interrupted from 00:36 Hrs to

01:50 Hrs of 03rd May 2018. The list of trippings is enclosed at annexure I.

4. Action Taken: Coordinated with all RLDCs to restore the lines. Total of 8 no. of reserve

regulation ancillary services (RRAS) down instructions were given for maintaining the frequency

within band in view of load crash besides relieving the loading in system.

5. Current Status: The system is in ALERT state sue to the above trippings and all control centers

are being sensitize accordingly. Due to complete outage of 765 kV Agra station which is centrally

50 Hz

49.84 Hz

50.24 Hz

5

Annexure-I

The details of transmission lines tripped during 02nd -03rd May 2018 is given below:

Northern Region Lines

S.No. Element Name Volta

ge Level

Owner

Outage Revival

Reason

Date Time Date Time

1. 1 Jalandhar-Kurukshetra(PG) 1

400 kV PGCIL 02-05-2018 14:08 02-05-2018 15:00 Tripped due to Bad weather. R-N Phase

2. 2 Kanpur-Varanasi-D/C 765 kV PGCIL 03-05-2018 01:41

Tripped on R-N fault, 22.1KM from Kanpur end.

3. 3 Patiala 315 MVA ICT 1 400/22

0 kV PGCIL 02-05-2018 14:17 03-05-2018 00:27

Tripped due to Bad weather.

4. 4 Rajpura (400kV) 500 MVA ICT 3

400/220 kV

PGCIL 02-05-2018 14:23 02-05-2018 16:04 Tripped due to bad weather.

5. 5 Anta RS - Chabra -1 400 kV RRVPNL 02-05-2018 14:40 02-05-2018 15:25

Tripped due to LBB, Bus bar protection of Bus-2 operated at Anta.

6. 6 Anta RS - Kawai(Adani) - 2 400 kV RRVPNL 02-05-2018 14:40 02-05-2018 15:30


7. 7 Bhilwara 400(RVPNL)-Chabra(RVPNL) 1

400 kV RRVPNL 02-05-2018 14:40 * * Phase to earth faultDue to Power Swing Block

8. 8 Anta RS - Kawai(Adani) - 1 400 kV RRVPNL 02-05-2018 14:40 02-05-2018 15:02


9. 9 Jind(PG)-Kurukshetra(PG) 2

400 kV PGCIL 02-05-2018 14:55 02-05-2018 15:26 Phase to earth faultB-N, 12.14 from Kurkshetra.

10. 10 Baghpat(PG)-Dehradun(PG)

400 kV PGCIL 02-05-2018 16:04 02-05-2018 17:10 Due to

11. 11 Meerut-Koteshwar Pool 1 400 kV PGCIL 02-05-2018 16:20 02-05-2018 17:39

Phase to earth faultDue to Bad Weather

6



ge Level

Owner

Outage Revival

Reason

Date Time Date Time

12. 12 Abdullapur(PG)-Dehradun(PG) 2

400 kV PGCIL 02-05-2018 16:32 02-05-2018 16:46 Phase to earth faultR-N

13. 13 Koteshwar Pool (PG)-Tehri(THDC) 2

400 kV PGCIL 02-05-2018 16:40 02-05-2018 17:55 Phase to earth faultDue to Bad Weather

14. 14 Ataur(UP)-Muzaffarnagar(UP)

400 kV UPPTCL 02-05-2018 16:58 02-05-2018 19:11 Manually tripped due to sparking observed in switchyard.

15. 15 Alaknanda HEP - Muzaffarnagar - 2


16. 16 Muzaffarnagar-Vishnuprayag 1

400 kV UPPTCL 02-05-2018 16:58 02-05-2018 20:37

Tripped due to B-Phase CB of Muzaffarnagar-Vishnuprayag burst at Muzaffarnagar end.

17. 17 Muzaffarnagar(UP)-Roorkee(PG)


18. 18 Bareilly II (PG) - Kashipur (UTT) - 1

400 kV PGCIL 02-05-2018 16:58 02-05-2018 21:22

E/S/D availed due to sparking observed in R-Phase isolator at Kashipur end.

19. 19 Muzaffarnagar 315 MVA ICT 2

400/220 kV

UPPTCL 02-05-2018 16:58 02-05-2018 18:31 Manually tripped due to sparking observed in switchyard.


400/220 kV



400/220 kV


22. 22 Muzaffarnagar 400 kV Bus 1

400 kV UPPTCL 02-05-2018 16:58 * * Manually tripped due to sparking observed in switchyard.

23. 23 Muzaffarnagar 400 kV Bus 2

400 kV UPPTCL 02-05-2018 16:58 * * Manually tripped due to sparking observed in switchyard.

24. 24 Ballabgarh(PG)-Bamnauli(DTL) 2

400 kV DTL 02-05-2018 17:23 02-05-2018 19:45 Tripped due to bad weather.

25. 25 Ballabgarh(PG)-Bamnauli(DTL) 1

400 kV DTL 02-05-2018 17:23 02-05-2018 19:46 Tripped due to bad weather

26. 26 Bhiwadi-Neemrana 2 400 kV PGCIL 02-05-2018 18:11 02-05-2018 20:17

Tripped on R-N fault, 48.5KM from Bhiwadi end.

7



ge Level

Owner

Outage Revival

Reason

Date Time Date Time

27. 27 Bassi-Kotputli 400 kV PGCIL 02-05-2018 18:13 02-05-2018 19:58

Tripped due to bad weather

28. 28 Bareilly(PG)-Moradabad(UP) 1

400 kV PGCIL 02-05-2018 18:33 02-05-2018 19:33 Phase to earth fault.

29. 29 Alwar II-Hindaun II -1 400 kV RRVPNL 02-05-2018 18:49 02-05-2018 21:33

Tripped on B-N fault, Distance 79KM from Hindaun end.

30. 30 Heerapura-Hindaun II 400 kV RRVPNL 02-05-2018 18:50 * *

Manually tripped due to sparking observed in R-Phase isolator at Hindaun end.

31. 31 Gwalior (PG) - Phagi (RVPNL) - 1

765 kV PGCIL 02-05-2018 20:07 02-05-2018 21:27 Tripped on R-N fault.

32. 32 Ballabgarh-Mainpuri 1 400 kV PGCIL 02-05-2018 20:26 02-05-2018 21:29 Tripped on R-N fault

33. 33 Agra-Gwalior -2 765 kV PGCIL 02-05-2018 20:32 * *

Phase to earth faultY-N, 114km & 6.89kA

34. 34 Agra-Gwalior -1 765 kV PGCIL 02-05-2018 20:32 * *

Phase to earth faultY-N, 107km & 5.6kA from Gwalior end.

35. 35 Agra(PG)-Agra(UP) 2 400 kV PGCIL 02-05-2018 20:32 02-05-2018 22:13 Tripped on R-N fault

36. 36 Agra - Biswanath Cherialli line -2

800 kV HVDC

PGCIL 02-05-2018 20:35 * *

Tripped due to bad weather, as reported tower collapse near Agra end. Details awaited.

37. 37 Auraiya(NTPC)-Mahgaon(PG)

220 kV PGCIL 02-05-2018 20:47 * * Phase to phase faultB-C, 174km from Auraiya end.

38. 38 Agra(UP)-Fatehabad 765 (UP) 2

400 kV PGCIL 02-05-2018 20:48 02-05-2018 22:48 Tripped on R-N fault

39. 39 Ajmer II(RVPNL)-Phagi(RVPNL) 2(RRVPNL)

400 kV RRVPNL 02-05-2018 20:50 * * Tripped due to problem in CVT.

40. 40 Fatehabad 765(UP)-Lalitpur TPS(LPGCL) 2

765 kV UPPTCL 02-05-2018 21:07 03-05-2018 01:00 Tripped due to bad weather

41. 41 Fatehpur 315 MVA ICT 1

400/220 kV

PGCIL 02-05-2018 21:07 03-05-2018 00:46 Tripped due to bad weather

8



ge Level

Owner

Outage Revival

Reason

Date Time Date Time

42. 42 Mainpuri(PG)-Neebkarori(UP) 1

220 kV UPPTCL 02-05-2018 22:05 * * Tripped on B-N fault, 2.25KM from Neebkarori end.

43. 43 Aligarh(UP)-Mainpuri 765(UP) 2

400 kV UPPTCL 02-05-2018 22:06 02-05-2018 23:46 Phase to earth fault.

44. 44 Aligarh 765(PG)-Orai 765(PG) 1

765 kV PGCIL 02-05-2018 22:12 02-05-2018 22:52 Tripped due to problem in guage of CB.

45. 45 Mainpuri(PG)-Neebkarori(UP) 2

220 kV UPPTCL 02-05-2018 22:15 * * Tripped on B-N fault, 2.27KM from Neebkarori end.

46. 46 Champa(WR) - Kurukshetra(NR) line -2

800 kV HVDC

PGCIL 02-05-2018 22:17 03-05-2018 00:05 Due to bad weather, details awaited.

47. Agra-Kanpur 400 kV PGCIL 02-05-2018 22:23

B-N Fault. As reported by CPCC, Tower bend observed.

48. 47 Aligarh 765(PG)-Orai 765(PG) 2

765 kV PGCIL 02-05-2018 22:39 02-05-2018 23:22 Tripped on R-N fault, 215KM from Aligarh end.

49. 48 Orai 400(UP)-Orai 765(PG) 1

400 kV PGCIL 02-05-2018 22:39 03-05-2018 01:05 Due to bad weather

50. 49 Orai 400(UP)-Orai 765(PG) 2

400 kV PGCIL 02-05-2018 22:39 03-05-2018 07:50 Due to bad weather

51. 50 Orai 765(PG) 1000 MVA ICT 1

765/400 kV

PGCIL 02-05-2018 22:48 02-05-2018 23:33 Tripped on oil surge relay operated.

52. 51 Bhilwara-Chhabra 1 400 kV RRVPNL 02-05-2018 23:40 03-05-2018 01:02

Tripped due to LBB Optd at Bhilwara end

53. 52 Ajmer II(RVPNL)-Bhilwara 400(RVPNL) 1

400 kV RRVPNL 02-05-2018 23:40 03-05-2018 06:27 Tripped due to LBB Optd at Bhilwara end

54. 53 Fatehpur-Mainpuri 1 400 kV PGCIL 03-05-2018 00:17 03-05-2018 00:39 Tripped on R-N fault

55. 54 Amritsar-Parb-pol 1 400 kV PGCIL 03-05-2018 00:25 * * .

56. 55 Dhanonda-Jhajjar CLP-1 400 kV HVPNL 03-05-2018 01:21 03-05-2018 06:16

Phase to earth faultR-N, 7km from CLP end.

9



ge Level

Owner

Outage Revival

Reason

Date Time Date Time

57. 56 Meerut - Moga 765 kV PGCIL 03-05-2018 01:25 * * .

58. 57 Bara TPS(UP)-Meza TPS(UP) 2

400 kV UPPTCL 03-05-2018 01:33 * * Over voltage.

59. 58 Lucknow(UP)-Singrauli(NTPC)

400 kV PGCIL 03-05-2018 01:33 03-05-2018 03:08 Tripped on R-N fault

60. 59 Gorakhpur(PG)-Muzaffarpur(PG) 2

400 kV PLINK 03-05-2018 01:34 * * Tripped on R- N fault

61. 60 Allahabad(PG) - Kanpur New(PG) 2

400 kV PGCIL 03-05-2018 01:36 03-05-2018 02:52 Tripped on B-N fault,

62. 61

Allahabad Rewa Road(400kV) - Banda(400kV) 1

400 kV UPPTCL 03-05-2018 01:38 * * Tripped on B-N fault, 266.62KM from Banda end.

63. 62 Kanpur New-Varanasi 2 765 kV PGCIL 03-05-2018 01:41 * *


64. 63 Gorakhpur(PG)-Motihari(DMTCL) 1

400 kV PGCIL 03-05-2018 02:39 03-05-2018 03:39 Tripped from Motihari end only.

65. 64 Vindhyachal HVDC BtB Block 1

500 kV HVDC

PGCIL 03-05-2018 02:56 03-05-2018 07:44 Tripped due to DC over current protection operated

66. 65 Obra TPS(UPPTCL) 315 MVA ICT 1

400/220 kV

UPPTCL 03-05-2018 03:05 * * Details awaited.

67. 66 Anpara B-Anpara D 1 400 kV UPPTCL 03-05-2018 03:14 * *

Phase to earth faultB-N.

68. 67 Allahabad Rewa Road(400kV) - Obra

400 kV UPPTCL 03-05-2018 03:20 * * Over voltage.

69. 68 Fatehpur-Varanasi 1 765 kV PGCIL 03-05-2018 04:04 03-05-2018 04:32

Bus bar protection operatedTripped on R-N fault, 17.79KM from Varanasi end, F.C=10.1KA

70. 69 Chamera pool-Jalandhar 2 400 kV PGCIL 03-05-2018 04:20 * *

Bus bar protection operatedBus-2 at Chamba/ line faulty

71. 70 Chamba 315 MVA ICT 2

400/220 kV

PGCIL 03-05-2018 04:20 03-05-2018 05:48 Bus bar protection operatedBus-2 at Chamba

10



ge Level

Owner

Outage Revival

Reason

Date Time Date Time

72. 71 Bareilly(UP)-Dhauliganga(NHPC)

220 kV PGCIL 03-05-2018 05:05 * * Tripped on High voltage.

73. 72 Dhauliganga(NHPC)-Pithorgarh(PG)

220 kV PGCIL 03-05-2018 05:05 * * Tripped on High voltage.

74. 73 Pithorgarh 100 MVA ICT-2

220/132 kV

PGCIL 03-05-2018 05:22 * * Over fluxing.

75. 74 Pithorgarh 100 MVA ICT-1

220/132 kV

PGCIL 03-05-2018 05:22 * * Over fluxing.

11

Western Region Lines

S.No. Element Name Voltage

Level Owner

Outage Revival

Reason

Date Time Date Time

1 Dharamjaygarh(PG)-Jabalpur(PS)-III

765 kV Sterlite 02-05-2018 15:48 02-05-2018 22:42 R-Y fault

2 BHADRAWATI-DHARIWAL-I

400 kV PGCIL 02-05-2018 19:09 02-05-2018 20:40 B-E fault

3 DHARIWAL-PARLI-I 400 kV PGCIL 02-05-2018 19:09 02-05-2018 20:49 B-E fault

4 WARORA-CHANDRAPUR(2)-II

400 kV MSETCL 02-05-2018 19:31 03-05-2018 07:01 B-E fault

5 MEHGAON-AURAIYA S/C 220 kV PGCIL 02-05-2018 20:58 02-05-2018 21:22 Tripped only from Auraiya

6 220kV Satna-Satna(MP)-4-IV

220 kV MPPTCL 03-05-2018 01:11 * * B-E fault

7 Vindhayachal(PS)-Satna(PG)-I

765 kV PGCIL 03-05-2018 01:12 03-05-2018 04:05 B-E fault

8 VSTPS(IV)-VSTPS(V)-II 400 kV NTPC 03-05-2018 03:13 * * B-E fault

9 VSTPS(NTPC)-VINDHYACHAL(PS)-I

400 kV PGCIL 03-05-2018 03:15 * * R-E fault

10 Sasan-Vindhyanchal-II 765 kV ATIL 03-05-2018 03:18 * *

Tripped due to Y-ph-E fault sasan-15.88 kA,2.86km, V'chal-9.24 kA,2.42km

11 VSTPS-KORBA-I 400 kV PGCIL 03-05-2018 04:00 03-05-2018 08:21 Y-ph-E fault

12

Eastern Region Lines

S.No. Element Name Voltage

Level Owner

Outage Revival

Reason

Date Time Date Time

1 RANCHI-Maithon RB II 400KV PGCIL 02-05-2018 15:55 02-05-2018 16:36 R-N Fault

2 RANCHI-New Ranchi II 400KV PGCIL 02-05-2018 15:55 02-05-2018 16:51 R-N Fault

3 RANCHI-New Ranchi I 400KV PGCIL 02-05-2018 15:56 02-05-2018 16:50 R-N Fault

4 Ranchi-Raghunathpur III 400KV PGCIL 02-05-2018 15:57 02-05-2018 17:00 R-N Fault

5 Ranchi-Maithon RB I 400KV PGCIL 02-05-2018 16:15 02-05-2018 16:25 R-N Fault

6 Jamshedpur-DSTPS I 400KV PGCIL 02-05-2018 16:35 B-N Fault

7 TSTPP-RENGALI-I 400KV PGCIL 02-05-2018 21:44 02-05-2018 22:15 R-N Fault

8 ANGUL-SRIKAKULAM-II 765 kV PGCIL 02-05-2018 23:34 03-05-2018 00:19 R-N Fault

9 MUZAFFARPUR-GORAKHPUR-II

400KV PGCIL 03-05-2018 01:34 R-N Fault

10 GORAKHPUR-MOTIHARI-I

400KV PGCIL 03-05-2018 02:40 B-N Fault

Annexe-II

Annexure-A

Power System Operation Corporation Ltd. Northern Regional Load Despatch Centre

Dated: 03- May -2018

Report on Load Crash in Northern Grid from 13:54hrs/02-May-18 onwards

The Northern Region (NR) experienced demand crash on account of rain with thunderstorm. The event based upon data received and available at NRLDC is summarized below:

Load crash witnessed in the all the states of Northern Region.

High frequency and high voltage condition prevailed. Frequency touched 50.22Hz at 04:04hrs/03.05.2018.

The load of NR started reducing after 13:54hrs of 02.05.2018. Average demand crash of 11000 MW was observed during inclement weather conditions (night hours of 02-05-2018 to morning hours of 03-05-2018) as compared to the previous day.

The demand pattern of Northern Region and its state is attached as Annex-I. Schedule & Actual of affected NR state control areas is given at Annex-II. The Schedule & Actual IR exchange of NR is given at Annex-III

At 16:58hrs, complete station outage occurred at 400/220kV Muzaffarnagar (UP). Total 12 multiple element tripping event occurred in Northern Region, separate list of multiple element tripping along with category according to CEA grid standard is attached as Annex-IV

During the storm, complete 765kV Agra (PG) station became dead due to outage of multiple 765kV lines due to equipment damage or tower collapse.

At 20:35hrs, HVDC Agra-BNC Pole-2 also tripped due to tower collapse in HVDC line. HVDC Champa (WR) - Kurukshetra(NR) Pole -2 also went under outage at 22:17hrs of 2nd May 2018.

At 21:05hrs, 765kV Lalitpur-Fatehabad ckt-2 tripped. Lalitpur generation was hanging on only one ckt 765kV Lalitpur-Fatehabad ckt-2. .

At 22:12hrs, 765kV Aligarh-Orai ckt-1 tripped, after some time at 22:39hrs, 765kV Aligarh-Orai ckt-2 and 400kV Orai-Orai one circuit also tripped, it led to limitation on import by NR through Orai-Satna and Orai-Jabalpur D/C line.

Outage of 765kV Agra (PG) and 765kV Aligarh-Orai lines, Outage of one pole of Champa-Kurukshetra and one circuit of 765 Gwalior-Phagi severely deteriorated WR-NR interconnection corridor. The situation was further complicated with high wind generation in Rajasthan coupled with low demand and power rushing from NR to WR on 400kV Kankroli-Zerda and Bhinmal-Zerda lines.

The Railway traction supply was also affected in the incident due to tripping of lines from Agra station. The traction supply from 400/220 kV Auraiya station was interrupted from 00:36 Hrs to 01:50 Hrs of 03rd May 2018. 220kV Railway lines from 220kV Auraiya station was charged after bypassing over voltage protection at 220kV Auraiya (NTPC).

Total 36 no. of 400kV and above lines were manually opened to control the voltage and total 91 no. of 220kV and above elements (lines and ICTs) tripped during 02-03 May 2018. The list of tripped elements and opened on high voltage is attached as Annex-V. (some of state control area 220 kV lines may still not be in the list in view information receipt delay from SLDCs)

The frequency has remained above most of the time during inclement weather. Frequency plot from 08:00 Hrs (02-05-18) to 18:00 (03-05-18) Hrs is given below:

50 Hz

line

Summary of demand crash observed in respective states of Northern region:

States Load crash started at_ 02-05-2018

Maximum Demand crashed (MW)

J&K 11:47hrs 672(14:01hrs)

Punjab 12:28hrs 3105 (14:29hrs)

HP 14:08hrs 419(15:43hrs)

Haryana 14:39hrs 2930 (17:33hrs)

Uttarakhand 15:47hrs 1206(19:48hrs)

Delhi 16:24hrs 926(20:40hrs)

Uttar Pradesh 16:36hrs 8056 (04:00hrs of 03-05-2018)

Rajasthan 17:57hrs 2112 (20:54hrs)

NR demand crash 13:54hrs 14000 (04:00hrs)

The above table also indicates movement of inclement weather conditions from state to state.

Actions taken at Control Centre:

Warning about inclement weather condition was given to all the states in advance.

Alerts were issued to all concerned to reduce under-drawl and for backing down of

generation in order to control high frequency operation besides containing over-

voltages.

Immediate actions were taken to surrender power from ISGS generating stations &

ancillary down (RRAS down) were imposed.

The generation of ISGS thermal stations was backed down.

State control area generation was also reduced by SLDCs.

The pattern of regional thermal generation is attached at Annex-VI.

Present Condition (16:00hrs of 03rd May 2018):

System is in normal condition. The frequency is being in the IEGC stipulated band.

The Northern Regional demand is picking up and is around 38GW. The demand is still 4.1GW less than the normal day.

Due to complete outage of 765 kV Agra station which is centrally located in the grid, the import capability of northern region is adversely affected. The transmission towers of 765 kV Agra-Aligarh, 765 kV Kanpur-Varanasi-I & II, 400 kV Kanpur-Agra and MTDC BNC- Alipurduar- Agra are reported to be damaged. The equipment damage reported at 765/400 kV Agra substation. This

would delay in restoration of lines and thus limit the transfer capability in west to north corridor this has led to reduction in Total transfer capability (TTC) of Northern region import. The details of revision in TTC for the incident is given below:

It has been observed from the previous thunderstorm incidents that utilities are

manually shutting down their feeders during the storm to avoid collateral damage. It was

decided in last year summer preparedness meeting taken by Joint Secretary (Trans), MOP

that the states shall categorize all the feeders in two lists, one which do not require manual

opening (in view of safety requirements), and the other with safety concern. The list with

safety concern shall be progressively reduced.

This aspect has been discussed during different meetings at NRPC level as well. However,

the list from the states is yet to be received.

All utilities shall provide the list of manually opened feeders during this event along with the

detailed report to NRLDC at the earliest time. All entities shall also provide the DR/EL,

detailed report of the tripped elements/load crash along with the remedial actions taken/to

betaken.

Corridor Present TTC (MW)-Considering

outages

Reduction in TTC(MW) from earlier

level

WR-NR 7700 2600

ER-NR 4000 500

Simultaneous NR

Import

11000 3700

Annex-I

Annex-I

Northern Region Demand Pattern for (01-03 May 2018)

Maximum demand crash

at 04hrs of 3rd May 2018,

14GW

Annex-II

Schedule vis-à-vis Actual interchange

Annex-II

Schedule vis-à-vis Actual interchange

Annexure-III

Inter-Regional Exchange (NR-WR & NR-ER)

Annex-IV

S. No

Element Name Type

Voltage Level

Owner

Outage Revival Reason / Remarks

Category as per Grid Standard Date Time Date Time

1 Dhuri (400kV)-Rajpura (400kV)-1

Line 400 kV PSTCL 2/5/2018 13:36 2/5/2018 18:11 Phase to earth fault R-N

GI-2

2 Dhuri(400) 500 MVA ICT 3

ICT 400/220 kV

PSTCL 2/5/2018 13:36 2/5/2018 14:52 Tripped due to directional earth fault.

3 Patiala 125 MVAR B/R

Bus Reactor

400 kV PGCIL 2/5/2018 14:16 3/5/2018 0:56 Tripped due to Bad weather.

GI-2

4 Patiala 315 MVA ICT 1

ICT 400/220 kV

PGCIL 2/5/2018 14:17 3/5/2018 0:27 Tripped due to Bad weather.

5 Ataur(UP)-Muzaffarnagar(UP)

Line 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 19:11

Manually tripped due to sparking observed in switchyard.

GD-1

6 Alaknanda HEP - Muzaffarnagar - 2

Line 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 18:27


7 Muzaffarnagar-Vishnuprayag 1

Line 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 20:37


8 Muzaffarnagar(UP)-Roorkee(PG)

Line 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 18:27


9 Bareilly II (PG) - Kashipur (UTT) - 1

Line 400 kV PGCIL 2/5/2018 16:58 2/5/2018 21:22


10 Muzaffarnagar 315 MVA ICT 2

ICT 400/220 kV

UPPTCL 2/5/2018 16:58 2/5/2018 18:31



ICT 400/220 kV

UPPTCL 2/5/2018 16:58 2/5/2018 18:29



ICT 400/220 kV

UPPTCL 2/5/2018 16:58 2/5/2018 18:49


13 Muzaffarnagar 400 kV Bus 1

BUS 400 kV UPPTCL 2/5/2018 16:58 * *



BUS 400 kV UPPTCL 2/5/2018 16:58 * *


15 Ballabgarh(PG)-Bamnauli(DTL) 2

Line 400 kV DTL 2/5/2018 17:23 2/5/2018 19:45 Tripped due to bad weather.

GI-2

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Line 400 kV DTL 2/5/2018 17:23 2/5/2018 19:46 Tripped due to bad weather

17 Alwar II-Hindaun II -1

Line 400 kV RRVPNL 2/5/2018 18:49 2/5/2018 21:33


GI-2

18 Heerapura-Hindaun II

Line 400 kV RRVPNL 2/5/2018 18:50 * *


19 Agra-Gwalior -2 Line 765 kV PGCIL 2/5/2018 20:32 * * Phase to earth faultY-N, 114km & 6.89kA

GI-2

20 Agra-Gwalior -1 Line 765 kV PGCIL 2/5/2018 20:32 * *


21 Agra(PG)-Agra(UP) 2

Line 400 kV PGCIL 2/5/2018 20:32 2/5/2018 22:13 Tripped on R-N fault

22 Agra-Fatehpur ckt-1

Line 765 kV PGCIL 2/5/2018 20:32 * *


Line 765 kV PGCIL 2/5/2018 20:32 * *

24 Agra-Aligarh ckt Line 765 kV PGCIL 2/5/2018 20:32 * *

25 1500MVA ICT-1 at Agra

ICT 765/400 kV

PGCIL 2/5/2018 20:32


ICT 765/400 kV

PGCIL 2/5/2018 20:32

27 Aligarh 765(PG)-Orai 765(PG) 2

Line 765 kV PGCIL 2/5/2018 22:39 2/5/2018 23:22

Tripped on R-N fault, 215KM from Aligarh end.

GI-2

28 Orai 400(UP)-Orai 765(PG) 2

Line 400 kV PGCIL 2/5/2018 22:39 3/5/2018 7:50 Due to bad weather

29 Bhilwara-Chhabra 1 Line 400 kV RRVPNL 2/5/2018 23:40 3/5/2018 1:02 Tripped due to LBB Optd at Bhilwara end

GI-2

30

Ajmer II(RVPNL)-Bhilwara 400(RVPNL) 1

Line 400 kV RRVPNL 2/5/2018 23:40 3/5/2018 6:27 Tripped due to LBB Optd at Bhilwara end

31 Chamera pool-Jalandhar 2

Line 400 kV PGCIL 3/5/2018 4:20 * *

Bus bar protection operatedBus-2 at Chamba/ line faulty GI-2

32 Chamba 315 MVA ICT 2

ICT 400/220 kV

PGCIL 3/5/2018 4:20 3/5/2018 5:48

Bus bar protection operatedBus-2 at Chamba

33 Bareilly(UP)-Dhauliganga(NHPC)

Line 220 kV PGCIL 3/5/2018 5:05 * * Tripped on High voltage.

GI-1

34 Dhauliganga(NHPC)-Pithorgarh(PG)

Line 220 kV PGCIL 3/5/2018 5:05 * * Tripped on High voltage.

35 Pithorgarh 100 MVA ICT-1

ICT 220/132 kV

PGCIL 3/5/2018 5:22 * * Over fluxing.

GD-1


ICT 220/132 kV

PGCIL 3/5/2018 5:22 * * Over fluxing.

37

Allahabad Rewa Road(400kV)(UP)-Meza TPS(UP) 2

Line 400 kV UPPTCL 3/5/2018 10:30 * * Over voltageTripped

GI-2

38

Allahabad Rewa Road(400kV) - Panki

Line 400 kV UPPTCL 3/5/2018 10:30 * * Over voltageTripped

Annex-V

S.No Element Name Type

Voltage Level

Owner

Outage Revival Expected Date of Revival

Reason / Remarks

Status received from site Date Time Date Time

1 Jassor(HP)-Pong(BBMB)

Line 220 kV PGCIL 2/5/2018 11:13 2/5/2018 11:50 -

Tripped due to Bus bar protection of Bus-1 operated due to blast of B-ph CT of GT-3. Tripped from Jassor end.

2 Bairasuil(NHPC)-Pong(BBMB)

Line 220 kV PGCIL 2/5/2018 11:13 2/5/2018 11:29 -

Tripped due to Bus bar protection of Bus-1 operated due to blast of B-ph CT of GT-3.

3 Makhu - Nakodar - 2

Line 400 kV PSTCL 2/5/2018 12:36 2/5/2018 13:20 -

Phase to earth faultTripped due R-N fault, Z-1,

4 Dhuri (400kV)-Rajpura (400kV)-1

Line 400 kV PSTCL 2/5/2018 13:36 2/5/2018 18:11 - Phase to earth faultR-N

5 Dhuri(400) 500 MVA ICT 3

ICT 400/ 220 kV

PSTCL 2/5/2018 13:36 2/5/2018 14:52 - Tripped due to directional earth fault.

6 Patiala(PG)-Patran(PTCL) 2

Line 400 kV PGCIL 2/5/2018 14:03 2/5/2018 15:02 -

tripped due to R phase Earth fault at 55.3 KM from Patran end

7 Jalandhar-Kurukshetra(PG) 1

Line 400 kV PGCIL 2/5/2018 14:08 2/5/2018 15:00 - Tripped due to Bad weather. R-N Phase

8 Patiala 125 MVAR B/R

Bus Reactor

400 kV PGCIL 2/5/2018 14:16 3/5/2018 0:56 - Tripped due to Bad weather.

9 Patiala 315 MVA ICT 1

ICT 400/ 220 kV

PGCIL 2/5/2018 14:17 3/5/2018 0:27 - Tripped due to Bad weather.

10 Rajpura (400kV) 500 MVA ICT 3

ICT 400/ 220 kV

PGCIL 2/5/2018 14:23 2/5/2018 16:04 - Tripped due to bad weather.

11 Anta RS - Chabra -1 Line 400 kV RRVPNL 2/5/2018 14:40 2/5/2018 15:25 -


12 Anta RS - Kawai(Adani) - 2

Line 400 kV RRVPNL 2/5/2018 14:40 2/5/2018 15:30 -


13 Bhilwara 400(RVPNL)-Chabra(RVPNL) 1

Line 400 kV RRVPNL 2/5/2018 14:40 * * NA

Phase to earth faultDue to Power Swing Block

14 Anta RS - Kawai(Adani) - 1

Line 400 kV RRVPNL 2/5/2018 14:40 2/5/2018 15:02 -







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15 Jind(PG)-Kurukshetra(PG) 2

Line 400 kV PGCIL 2/5/2018 14:55 2/5/2018 15:26 -

Phase to earth faultB-N, 12.14 from Kurkshetra.

16 Aligarh 765(PG)-Jhatikara(PG)

Line 765 kV PGCIL 2/5/2018 15:39 * * NA

E/S/D to attend the hanging jumper at tower no.1178.

17 Baghpat(PG)-Dehradun(PG)

Line 400 kV PGCIL 2/5/2018 16:04 2/5/2018 17:10 - Tripped due to bad weather.

18 Meerut-Koteshwar Pool 1

Line 400 kV PGCIL 2/5/2018 16:20 2/5/2018 17:39 - Phase to earth faultDue to Bad Weather

19 Abdullapur(PG)-Dehradun(PG) 2

Line 400 kV PGCIL 2/5/2018 16:32 2/5/2018 16:46 - Phase to earth faultR-N

20 Koteshwar Pool (PG)-Tehri(THDC) 2

Line 400 kV PGCIL 2/5/2018 16:40 2/5/2018 17:55 - Phase to earth faultDue to Bad Weather

21 Ataur(UP)-Muzaffarnagar(UP)

Line 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 19:11 -


22 Alaknanda HEP - Muzaffarnagar - 2

Line 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 18:27 -


23 Muzaffarnagar-Vishnuprayag 1

Line 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 20:37 -


24 Muzaffarnagar(UP)-Roorkee(PG)

Line 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 18:27 -


25 Bareilly II (PG) - Kashipur (UTT) - 1

Line 400 kV PGCIL 2/5/2018 16:58 2/5/2018 21:22 -



ICT 400/ 220 kV

UPPTCL 2/5/2018 16:58 2/5/2018 18:31 -



ICT 400/ 220 kV

UPPTCL 2/5/2018 16:58 2/5/2018 18:29 -



ICT 400/ 220 kV

UPPTCL 2/5/2018 16:58 2/5/2018 18:49 -



BUS 400 kV UPPTCL 2/5/2018 16:58 * * NA



BUS 400 kV UPPTCL 2/5/2018 16:58 * * NA



Line 400 kV DTL 2/5/2018 17:23 2/5/2018 19:45 - Tripped due to bad weather.


Line 400 kV DTL 2/5/2018 17:23 2/5/2018 19:46 - Tripped due to bad weather

33 Bhiwadi-Neemrana 2

Line 400 kV PGCIL 2/5/2018 18:11 2/5/2018 20:17 - Tripped on R-N fault, 48.5KM

from Bhiwadi end.

34 Bassi-Kotputli Line 400 kV PGCIL 2/5/2018 18:13 2/5/2018 19:58 - Tripped due to bad weather

35 Bareilly(PG)-Moradabad(UP) 1

Line 400 kV PGCIL 2/5/2018 18:33 2/5/2018 19:33 - Phase to earth fault.

36 Alwar II-Hindaun II -1

Line 400 kV RRVPNL 2/5/2018 18:49 2/5/2018 21:33 -


37 Heerapura-Hindaun II

Line 400 kV RRVPNL 2/5/2018 18:50 * * NA


38 Gwalior (PG) - Phagi (RVPNL) - 1

Line 765 kV PGCIL 2/5/2018 20:07 2/5/2018 21:27 - Tripped on R-N fault.

39 Ballabgarh-Mainpuri 1

Line 400 kV PGCIL 2/5/2018 20:26 2/5/2018 21:29 - Tripped on R-N fault

40 Agra-Gwalior -2 Line 765 kV PGCIL 2/5/2018 20:32 * * Still out Phase to earth faultY-N, 114km & 6.89kA

B phase WT damaged

41 Agra-Gwalior -1 Line 765 kV PGCIL 2/5/2018 20:32 * * Still out


R&B phase WT (Wave Trap) damaged and around 8nos of towers collapsed


Line 765 kV PGCIL 2/5/2018 20:32 * * Still out

B-ph BPI & CVT Bus Pipe dislocated


Line 765 kV PGCIL 2/5/2018 20:32 * * Still out

44 Agra-Aligarh ckt Line 765 kV PGCIL 2/5/2018 20:32 * * Still out

Reported four tower damaged at location no- 15,16,17 & 18c


ICT 765/ 400 kV

PGCIL 2/5/2018 20:32 Still out


ICT 765/ 400 kV

PGCIL 2/5/2018 20:32 Still out

47 Agra(PG)-Agra(UP) 2


48 Agra - Biswanath Cherialli line -2

Line 800 kV HVDC

PGCIL 2/5/2018 20:35 * * NA HVDC line fault

Tripped due to bad weather, as reported tower collapse near Agra end

49 Auraiya(NTPC)-Mahgaon(PG)

Line 220 kV PGCIL 2/5/2018 20:47 * * NA

Phase to phase faultB-C, 174km from Auraiya end.

50 Agra(UP)-Fatehabad 765 (UP) 2


51 Ajmer II(RVPNL)-Phagi(RVPNL)

Line 400 kV RRVPNL 2/5/2018 20:50 * * NA Tripped due to problem in CVT.

2(RRVPNL)

52 Fatehabad 765(UP)-Lalitpur TPS(LPGCL) 2

Line 765 kV UPPTCL 2/5/2018 21:07 3/5/2018 1:00 - Tripped due to bad weather

53 Fatehpur 315 MVA ICT 1

ICT 400/ 220 kV

PGCIL 2/5/2018 21:07 3/5/2018 0:46 - Tripped due to bad weather

54 1500MVA ICT-1 at Fatehabad

ICT 765/ 400kV

UPPTCL 2/5/2018 21:09 3/5/2018 0:46

55 Mainpuri(PG)-Neebkarori(UP) 1

Line 220 kV UPPTCL 2/5/2018 22:05 * * NA

Tripped on B-N fault, 2.25KM from Neebkarori end.

56 Aligarh(UP)-Mainpuri 765(UP) 2

Line 400 kV UPPTCL 2/5/2018 22:06 2/5/2018 23:46 - Phase to earth fault.


Line 765 kV PGCIL 2/5/2018 22:12 2/5/2018 22:52 - Tripped due to problem in guage of CB.

58 Mainpuri(PG)-Neebkarori(UP) 2

Line 220 kV UPPTCL 2/5/2018 22:15 * * NA

Tripped on B-N fault, 2.27KM from Neebkarori end.

59 Champa(WR) - Kurukshetra(NR) line -2

Line 800 kV HVDC

PGCIL 2/5/2018 22:17 3/5/2018 0:05 - Due to bad weather, details awaited.

60 Agra-Kanpur Line 400 kV PGCIL 2/5/2018 22:23 * * NA Phase to earth faultTripped on B-N Fault.

As reported by CPCC, Tower bend observed.


Line 765 kV PGCIL 2/5/2018 22:39 2/5/2018 23:22 -

Tripped on R-N fault, 215KM from Aligarh end.

62 Orai 400(UP)-Orai 765(PG) 2

Line 400 kV PGCIL 2/5/2018 22:39 3/5/2018 7:50 - Due to bad weather

63 Orai 765(PG) 1000 MVA ICT 1

ICT 765/ 400 kV

PGCIL 2/5/2018 22:48 2/5/2018 23:33 - Tripped on oil surge relay operated.

64 Bhilwara-Chhabra 1 Line 400 kV RRVPNL 2/5/2018 23:40 3/5/2018 1:02 - Tripped due to LBB Optd at Bhilwara end

65 Ajmer II(RVPNL)-Bhilwara 400(RVPNL) 1

Line 400 kV RRVPNL 2/5/2018 23:40 3/5/2018 6:27 Tripped due to LBB Optd at Bhilwara end

66 Parichha-Mainpuri 1 Line 400 kV UPPTCL 2/5/2018 23:53 Still out Charging attempt failed

67 Fatehpur-Mainpuri 1


68 Amritsar-Parb-pol 1 Line 400 kV PGCIL 3/5/2018 0:25 * * NA .

69 Dhanonda-Jhajjar CLP-1

Line 400 kV HVPNL 3/5/2018 1:21 3/5/2018 6:16 - Phase to earth faultR-N, 7km from CLP end.

70 Meerut - Moga Line 765 kV PGCIL 3/5/2018 1:25 * * NA .

71 Bara TPS(UP)-Meza TPS(UP) 2

Line 400 kV UPPTCL 3/5/2018 1:33 * * NA Over voltage.

72 Lucknow(UP)-Singrauli(NTPC)


73 Gorakhpur(PG)-Muzaffarpur(PG) 2

Line 400 kV PLINK 3/5/2018 1:34 * * NA Tripped on R- N fault

74 Allahabad(PG) - Kanpur New(PG) 2

Line 400 kV PGCIL 3/5/2018 1:36 3/5/2018 2:52 - Tripped on B-N fault,

75 Allahabad Rewa Road(400kV) - Banda(400kV) 1

Line 400 kV UPPTCL 3/5/2018 1:38 * * NA Tripped on B-N fault, 266.62KM from Banda end.

76 Kanpur New-Varanasi ckt-2

Line 765 kV PGCIL 3/5/2018 1:41 * * NA


Reported One tower collapsed near Ghatampur. As this is a double circuit tower, circuit-1 is also opened on emergency basis.

77 Gorakhpur(PG)-Motihari(DMTCL) 1

Line 400 kV PGCIL 3/5/2018 2:39 3/5/2018 3:39 - Tripped from Motihari end only.

78 Vindhyachal HVDC BtB Block 1

HVDV Station

500 kV HVDC

PGCIL 3/5/2018 2:56 3/5/2018 7:44 -

Tripped due to DC over current protection operated

79 Obra TPS(UPPTCL) 315 MVA ICT 1

ICT 400/ 220 kV

UPPTCL 3/5/2018 3:05 * * NA Details awaited.

80 Anpara B-Anpara D 1

Line 400 kV UPPTCL 3/5/2018 3:14 * * NA Phase to earth faultB-N.

81 Allahabad Rewa Road(400kV) - Obra

Line 400 kV UPPTCL 3/5/2018 3:20 * * NA Over voltage.

82 Fatehpur-Varanasi 1

Line 765 kV PGCIL 3/5/2018 4:04 3/5/2018 4:32 -

Bus bar protection operatedTripped on R-N fault, 17.79KM from Varanasi end, F.C=10.1KA

83 Chamera pool-Jalandhar 2

Line 400 kV PGCIL 3/5/2018 4:20 * * NA

Bus bar protection operatedBus-2 at Chamba/ line faulty

84 Chamba 315 MVA ICT 2

ICT 400/ 220 kV

PGCIL 3/5/2018 4:20 3/5/2018 5:48 -

Bus bar protection operatedBus-2 at Chamba

85 Bareilly(UP)-Dhauliganga(NHPC)

Line 220 kV PGCIL 3/5/2018 5:05 * * NA Tripped on High voltage.

86 Dhauliganga(NHPC)-Pithorgarh(PG)

Line 220 kV PGCIL 3/5/2018 5:05 * * NA Tripped on High voltage.


ICT 220/ 132 kV

PGCIL 3/5/2018 5:22 * * NA Over fluxing.


ICT 220/ 132 kV

PGCIL 3/5/2018 5:22 * * NA Over fluxing.

89 Kanpur New-Varanasi ckt-1

Line 765 kV PGCIL 3/5/2018 9:00 * *

Reported One tower collapsed near Ghatampur. As this is a double circuit tower, circuit-1 is also opened on emergency basis.

90 Allahabad Rewa Road(400kV)(UP)-Meza TPS(UP) 2

Line 400 kV UPPTCL 3/5/2018 10:30 * * NA Over voltageTripped

91 Allahabad Rewa Road(400kV) - Panki

Line 400 kV UPPTCL 3/5/2018 10:30 * * NA Over voltageTripped

Annex-V

List of lines manually open, to control high voltage:

Line manually opened on high voltage

S.No Element Name Type

Voltage Level

Owner

Outage Remarks

Date Time

1 Agra-Fatehpur Line 765 kV PGCIL 2/5/2018 7:48

2 Meerut - Moga Line 765 kV PGCIL 2/5/2018 16:49

3 Agra-Fatehpur 2 Line 765 kV PGCIL 2/5/2018 17:33

4 Allahabad Rewa Road(400kV)(UP)-Meza TPS(UP) 1 Line 400 kV UPPTCL 18-04-2018 13:01

5 Allahabad(PG)-Meja TPS(UP) 1 Line 400 kV PGCIL 18-04-2018 13:02

6 Ratangarh (RVPNL) - Sikar (PG) - 1 Line 400 kV PGCIL 25-04-2018 20:57

7 Agra(PG)-Auraiya(NTPC) 2 Line 400 kV PGCIL 26-04-2018 6:15

8 Agra-Sikar 1 Line 400 kV PGCIL 2/5/2018 6:52

9 Ballabgarh-Mainpuri 1 Line 400 kV PGCIL 2/5/2018 7:52

10 Fatehpur-Mainpuri 2 Line 400 kV PGCIL 2/5/2018 7:52

11 Jalandhar-Kurukshetra(PG) 1 Line 400 kV PGCIL 2/5/2018 16:42

12 Agra-Bhiwadi 2 Line 400 kV PGCIL 2/5/2018 16:55

13 Fatehpur-Mainpuri 2 Line 400 kV PGCIL 2/5/2018 16:56

14 Meerut(PG)-Muzaffarnagar(UP) Line 400 kV PGCIL 2/5/2018 16:58

15 Kurukshetra(PG)-Malerkotla(PG) 2 Line 400 kV NRSS31B 2/5/2018 17:03

16 Bhiwadi-Neemrana 1 Line 400 kV PGCIL 2/5/2018 17:17

17 Agra-Jaipur South-1 Line 400 kV PGCIL 2/5/2018 17:18

18 Bhiwadi-Hisar Line 400 kV PGCIL 2/5/2018 17:19

19 Fatehpur(PG)-Unchahar TPS(NTPC) 1 Line 400 kV PGCIL 2/5/2018 17:27

20 Ratangarh (RVPNL) - Sikar (PG) - 1 Line 400 kV PGCIL 2/5/2018 17:28

21 Babai 400 (RVPNL)- Neemrana (PG) 1 Line 400 kV PGCIL 2/5/2018 17:53

22 Bikaner (RVPNL) - Sikar (PG) - 2 Line 400 kV RRVPNL 2/5/2018 17:55

23 Jodhpur II-Merta 2 Line 400 kV RRVPNL 2/5/2018 17:59

24 Akal-Jodhpur II Line 400 kV RRVPNL 2/5/2018 18:00

25 Merta-Ratangarh Line 400 kV RRVPNL 2/5/2018 18:10

26 Agra-Sikar 2 Line 400 kV PGCIL 2/5/2018 18:27

27 Bhadla(RVPNL)-Bikaner(RVPNL) 1 Line 400 kV RRVPNL 2/5/2018 18:44

28 Bhadla(RVPNL)-Bikaner(RVPNL) 1 Line 400 kV RRVPNL 2/5/2018 18:44

29 Nallagarh(PG)-Parbati Pool(PG) Line 400 kV PKTCL 3/5/2018 0:26

30 Aligarh(UP)-Sikandrabad 400(UP) 2 Line 400 kV UPPTCL 3/5/2018 0:30

31 Agra-Jaipur South-2 Line 400 kV PGCIL 3/5/2018 0:43

32 Ballabgarh-Mainpuri 1 Line 400 kV PGCIL 3/5/2018 0:50

33 Jind(PG)-Kurukshetra(PG) 2 Line 400 kV PGCIL 3/5/2018 1:28

34 Agra(PG)-Auraiya(NTPC) 1 Line 400 kV PGCIL 3/5/2018 1:33

35 Agra(PG)-Auraiya(NTPC) 2 Line 400 kV PGCIL 3/5/2018 1:48

36 Ballabgarh-Kanpur 3 Line 400 kV PGCIL 3/5/2018 5:48






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Annexure-VI

Northern Regional Thermal Generation

Generation backing down started

at 14:43hrs

S.No Element NameVoltage Level Owner Reason / Remarks

Date Time Date Time1 Agra ‐ Biswanath Cherialli line ‐2 800 kV HVDC PGCIL 2/5/2018 20:35 * * Reported Three tower collapsed.2 Agra ‐ Biswanath Cherialli line ‐1 800 kV HVDC PGCIL 2/5/2018 20:35 * * Reported Threeo tower collapsed.

3Champa(WR) ‐ Kurukshetra(NR) line ‐2 800 kV HVDC PGCIL 2/5/2018 22:17 3/5/2018 0:05

Tripped during thunder storm, flag details awaited.

4 Gwalior (PG) ‐ Phagi (RVPNL) ‐ 1 765 kV PGCIL 2/5/2018 20:07 2/5/2018 21:27 Tripped on R‐N fault.

5 Agra‐Gwalior ‐1 765 kV PGCIL 2/5/2018 20:32 * *Phase to earth faultY‐N, 107km & 5.6kA from Gwalior end./ 9 Nos tower collapse.

6 Agra‐Gwalior ‐2 765 kV PGCIL 2/5/2018 20:32 5/5/2018 2:38Phase to earth faultY‐N, 114km & 6.89kA/ Switchyard equipment damage at Agra.

7 Agra‐Fatehpur 2 765 kV PGCIL 2/5/2018 20:33 * *Wave Trap/ LA/CVT found dislocated at Agra s/yard

8 Agra(PG)‐Aligarh 765(PG) 765 kV PGCIL 2/5/2018 20:33 * *Phase to earth faultY‐N, 0.4 kM, 6.6 KA/ 4 nos. tower damaged.

9 Agra‐Fatehpur 765 kV PGCIL 2/5/2018 20:34 * *Phase to earth faultR‐Y, .6 KM, 4.6 KA, HVDC CONDUCTOR FELL ON THIS LINE.

10 Fatehabad 765(UP)‐Lalitpur TPS(LPGC765 kV UPPTCL 2/5/2018 21:07 3/5/2018 1:00Tripped during thunder storm, flag details awaited.

11 Aligarh 765(PG)‐Orai 765(PG) 1 765 kV PGCIL 2/5/2018 22:12 2/5/2018 22:52 Tripped due to problem in guage of CB.

12 Aligarh 765(PG)‐Orai 765(PG) 2 765 kV PGCIL 2/5/2018 22:39 2/5/2018 23:22Tripped on R‐N fault, 215KM from Aligarh end.

13 Bara TPS 1500 MVA ICT 1 765/400 kV UPPTCL 2/4/2018 15:28 * * E/S/D due to Buccholz Alarm in Y phase ICT

14 Agra 1500 MVA ICT 1 765/400 kV PGCIL 2/5/2018 20:33 4/5/2018 18:03R‐Ph, Differential 6.1 KA. Charged from 400 Kv side.

Annexe‐III (Status of Northern Region Transmission elements which tripped on thunderstorm during 2nd‐3rd May 2018)

Outage Revival

S.No Element NameVoltage Level Owner Reason / RemarksOutage Revival

15 Agra 1500 MVA ICT 2 765/400 kV PGCIL 2/5/2018 20:34 4/5/2018 19:33Y‐Ph, Differential, 8.8 KA, Charged from 400 KV Side

16 Orai 765(PG) 1000 MVA ICT 1 765/400 kV PGCIL 2/5/2018 22:49 2/5/2018 23:39 Tripped on oil surge relay operated.17 Agra(PG) 3*80 MVAR( at 765kv ) B/R‐765 kV PGCIL 2/5/2018 20:34 * * TEED Protection, R‐Ph18 Agra(PG) 3*80 MVAR( at 765kv ) B/R‐765 kV PGCIL 2/5/2018 20:34 * * TEED Protection, R‐Ph

19 Bhiwani‐Jind 1 400 kV PGCIL 2/5/2018 5:30 2/5/2018 6:05Y‐phase Isolator of Main CB hand tripped due to heavy sparking.

20 Bhiwani‐Jind 1 400 kV PGCIL 2/5/2018 7:23 2/5/2018 10:09E/S/D .Y‐phase Isolator of Main CB hand tripped due to heavy sparking.

21 Makhu ‐ Nakodar ‐ 2 400 kV PSTCL 2/5/2018 12:36 2/5/2018 13:20Phase to earth faultTripped due R‐N fault, Z‐1,

22 Dhuri (400kV)‐Rajpura (400kV)‐1 400 kV PSTCL 2/5/2018 13:36 2/5/2018 18:11 Phase to earth faultR‐N

23 Patiala(PG)‐Patran(PTCL) 2 400 kV PGCIL 2/5/2018 14:03 2/5/2018 15:02tripped due to R phase Earth fault at 55.3 KM from Patran end

24 Jalandhar‐Kurukshetra(PG) 1 400 kV PGCIL 2/5/2018 14:08 2/5/2018 15:00 Tripped due to Bad weather. R‐N Phase

25 Anta RS ‐ Kawai(Adani) ‐ 2 400 kV RRVPNL 2/5/2018 14:40 2/5/2018 15:30Tripped due to LBB, Bus bar protection of Bus‐2 operated at Anta.

26 Anta RS ‐ Chabra ‐1 400 kV RRVPNL 2/5/2018 14:40 2/5/2018 15:25Tripped due to LBB, Bus bar protection of Bus‐2 operated at Anta.

27 Bhilwara 400(RVPNL)‐Chabra(RVPNL) 400 kV RRVPNL 2/5/2018 14:40 3/5/2018 0:00Phase to earth faultDue to Power Swing Block

28 Anta RS ‐ Kawai(Adani) ‐ 1 400 kV RRVPNL 2/5/2018 14:40 2/5/2018 15:02Tripped due to LBB, Bus bar protection of Bus‐2 operated at Anta.

29 Jind(PG)‐Kurukshetra(PG) 2 400 kV PGCIL 2/5/2018 14:55 2/5/2018 15:26Phase to earth faultB‐N, 12.14 from Kurkshetra.

30 Meerut‐Koteshwar Pool 1 400 kV PGCIL 2/5/2018 16:20 2/5/2018 17:39 Phase to earth faultDue to Bad Weather31 Abdullapur(PG)‐Dehradun(PG) 2 400 kV PGCIL 2/5/2018 16:32 2/5/2018 16:46 Phase to earth faultR‐N32 Koteshwar Pool (PG)‐Tehri(THDC) 2 400 kV PGCIL 2/5/2018 16:40 2/5/2018 17:55 Phase to earth faultDue to Bad Weather

33 Alaknanda HEP ‐ Muzaffarnagar ‐ 2 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 18:27Manually tripped due to sparking observed in switchyard.

34 Ataur(UP)‐Muzaffarnagar(UP) 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 19:11Manually tripped due to sparking observed in switchyard.


35 Muzaffarnagar‐Vishnuprayag 2 400 kV UPPTCL 2/5/2018 16:58 3/5/2018 17:04 Y ph CB blasted

36 Muzaffarnagar(UP)‐Roorkee(PG) 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 18:27Manually tripped due to sparking observed in switchyard.

37 Muzaffarnagar‐Vishnuprayag 1 400 kV UPPTCL 2/5/2018 16:58 2/5/2018 20:37

Tripped due to B‐Phase CB of Muzaffarnagar‐Vishnuprayag burst at Muzaffarnagar end.

38 Bareilly II (PG) ‐ Kashipur (UTT) ‐ 1 400 kV PGCIL 2/5/2018 16:58 2/5/2018 21:22E/S/D availed due to sparking observed in R‐Phase isolator at Kashipur end.

39 Ballabgarh(PG)‐Bamnauli(DTL) 2 400 kV DTL 2/5/2018 17:20 2/5/2018 19:42 Tripped due to bad weather.

40 Bhiwadi‐Neemrana 2 400 kV PGCIL 2/5/2018 18:11 2/5/2018 20:17Tripped on R‐N fault, 48.5KM from Bhiwadi end.

41 Bassi‐Kotputli 400 kV PGCIL 2/5/2018 18:13 2/5/2018 19:58 Tripped due to bad weather42 Bareilly(PG)‐Moradabad(UP) 1 400 kV PGCIL 2/5/2018 18:33 2/5/2018 19:33 Phase to earth fault.

43 Alwar II‐Hindaun II ‐1 400 kV RRVPNL 2/5/2018 18:49 2/5/2018 21:33Tripped on B‐N fault, Distance 79KM from Hindaun end.

44 Heerapura‐Hindaun II 400 kV RRVPNL 2/5/2018 18:50 2/5/2018 20:58Manually tripped due to sparking observed in R‐Phase isolator at Hindaun end.

45 Ballabgarh‐Mainpuri 1 400 kV PGCIL 2/5/2018 20:26 2/5/2018 21:29 Tripped on R‐N fault46 Agra(PG)‐Agra(UP) 2 400 kV PGCIL 2/5/2018 20:32 2/5/2018 22:13 Tripped on R‐N fault47 Agra(UP)‐Fatehabad 765 (UP) 2 400 kV PGCIL 2/5/2018 20:48 2/5/2018 22:48 Tripped on R‐N fault48 Aligarh(UP)‐Mainpuri 765(UP) 2 400 kV UPPTCL 2/5/2018 22:06 2/5/2018 23:46 Phase to earth fault.

49 Agra‐Kanpur 400 kV PGCIL 2/5/2018 22:23 * *Phase to earth faultTripped on B‐N Fault. One tower partially damaged.

50 Orai 400(UP)‐Orai 765(PG) 2 400 kV PGCIL 2/5/2018 22:38 3/5/2018 7:31Tripped during thunder storm, flag details awaited.

51 Orai 400(UP)‐Orai 765(PG) 1 400 kV PGCIL 2/5/2018 22:39 3/5/2018 1:05Tripped during thunder storm, flag details awaited.

52 Bhilwara‐Chhabra 1 400 kV RRVPNL 2/5/2018 23:40 3/5/2018 1:02 Tripped due to LBB Optd at Bhilwara end53 Ajmer II(RVPNL)‐Bhilwara 400(RVPNL 400 kV RRVPNL 2/5/2018 23:40 3/5/2018 6:27 Tripped due to LBB Optd at Bhilwara end


54 Dhuri(400) 500 MVA ICT 3 400/220 kV PSTCL 2/5/2018 13:36 2/5/2018 14:52 Tripped due to directional earth fault.

55 Patiala 315 MVA ICT 1 400/220 kV PGCIL 2/5/2018 14:17 3/5/2018 0:27Tripped during thunder storm, flag details awaited.

56 Rajpura (400kV) 500 MVA ICT 3 400/220 kV PGCIL 2/5/2018 14:23 2/5/2018 16:04 Tripped due to bad weather.57 Fatehpur 315 MVA ICT 1 400/220 kV PGCIL 2/5/2018 21:07 3/5/2018 0:46 Tripped due to storm, details awaited.

58 Patiala 125 MVAR B/R 400 kV PGCIL 2/5/2018 14:16 3/5/2018 0:56Tripped during thunder storm, flag details awaited.

59 Mandola(PG)‐Narela(DTL) 2 220 kV DTL 2/5/2018 9:14 2/5/2018 18:20ESD for replacement of porcelain insulator with polymer

60 Bairasuil(NHPC)‐Pong(BBMB) 220 kV PGCIL 2/5/2018 11:13 2/5/2018 11:29Tripped due to Bus bar protection of Bus‐1 operated due to blast of B‐ph CT of GT‐3.

61 Jassor(HP)‐Pong(BBMB) 220 kV PGCIL 2/5/2018 11:13 2/5/2018 11:50

Tripped due to Bus bar protection of Bus‐1 operated due to blast of B‐ph CT of GT‐3. Tripped from Jassor end.

62 Auraiya(NTPC)‐Mahgaon(PG) 220 kV PGCIL 2/5/2018 20:47 2/5/2018 21:30Phase to phase faultB‐C, 174km from Auraiya end.

63 Mainpuri(PG)‐Neebkarori(UP) 1 220 kV UPPTCL 2/5/2018 22:05 2/5/2018 23:16Tripped on B‐N fault, 2.25KM from Neebkarori end.

64 Mainpuri(PG)‐Neebkarori(UP) 2 220 kV UPPTCL 2/5/2018 22:15 2/5/2018 23:16Tripped on B‐N fault, 2.27KM from Neebkarori end.

65 Kanpur New‐Varanasi 2 765 kV PGCIL 3/5/2018 1:41 * *Tripped on R‐N fault, 22.1KM from Kanpur end./ 1 No Tower collpase.

66 Fatehpur‐Varanasi 1 765 kV PGCIL 3/5/2018 4:04 3/5/2018 4:32

Bus bar protection operatedTripped on R‐N fault, 17.79KM from Varanasi end, F.C=10.1KA


67 Kanpur New‐Varanasi 1 765 kV PGCIL 3/5/2018 9:00 * *

Being a double circuit tower, due to tower collapse, ckt‐1 is opened on emergency basis

68 Fatehpur‐Mainpuri 1 400 kV PGCIL 3/5/2018 0:17 3/5/2018 0:39 Tripped on R‐N fault

69 Dhanonda‐Jhajjar CLP‐1 400 kV HVPNL 3/5/2018 1:21 3/5/2018 6:16 Phase to earth faultR‐N, 7km from CLP end.70 Lucknow(UP)‐Singrauli(NTPC) 400 kV PGCIL 3/5/2018 1:33 3/5/2018 3:08 Tripped on R‐N fault71 Gorakhpur(PG)‐Muzaffarpur(PG) 2 400 kV PLINK 3/5/2018 1:34 3/5/2018 18:07 Tripped on R‐ N fault72 Allahabad(PG) ‐ Kanpur New(PG) 2 400 kV PGCIL 3/5/2018 1:36 3/5/2018 2:52 Tripped on B‐N fault,

73 Allahabad Rewa Road(400kV) ‐ Banda400 kV UPPTCL 3/5/2018 1:38 * *Tripped on B‐N fault, 266.62KM from Banda end.

74 Gorakhpur(PG)‐Motihari(DMTCL) 1 400 kV PGCIL 3/5/2018 2:39 3/5/2018 3:39 Tripped from Motihari end only.75 Pithorgarh 100 MVA ICT‐1 220/132 kV PGCIL 3/5/2018 5:22 3/5/2018 18:32 Over fluxing.

report dated 5th may 2018 at 15:00hrs - posoco

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