List of Grid Disturbances above 10 MW. Page 1 of 8

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Baldwin Adams
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1 List of Disturbances above 10 Page 1 of 8

2 ई.एल. 24 द व र A. Disturbance above 10 : kv Imphal (PG) - Imphal (MA) I 132 kv Imphal (PG) - Imphal (MA) II घटन क of 132 kv Imphal (PG) - Imphal (MA) I 132 kv Imphal (PG) - Imphal (MA) II घटन क of & MSPCL / MSPCL / MSPCL & MSPCL Imphal (PG) Earth Fault t Imphal t t Imphal (PG) Earth Fault Imphal t (प वव त त उत प न/ Antecedent : 1386, प वव त त ल ड/ Antecedent Load : 1181 ) & MSPCL & MSPCL : :08 Imphal (PG) t Imphal Imphal (PG) Imphal t Earth Fault t t t t :00 21: :30 0:22 t Capital area & Karong area of Manipur were connected with rest of NER through 132 kv Imphal-Imphal I & II lines (132 kv Kakching-Kongba line & 132 kv Karong-Kohima line kept open for system requirement). At 1608 Hrs on , 132 kv Imphal-Imphal I & II lines tripped. Due to of these elements, Capital area & Karong area were separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.015) (प वव त त उत प न/ Antecedent : 1059, प वव त त ल ड/ Antecedent Load : 1548 ) :04 0: :05 0:18 t Capital area & Karong area of Manipur were connected with rest of NER through 132 kv Imphal-Imphal I & II lines (132 kv Kakching-Kongba line & 132 kv Karong-Kohima line kept open for system requirement). At 0647 Hrs on , 132 kv Imphal-Imphal I & II lines tripped. Due to of these elements, Capital area & Karong area were separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.033) and 3 (e ) of Regulations Page 2 of 8

3 ई.एल. 24 द व र kv Silchar - Dullavcherra घटन क of 132 kv Silchar- PK Bari I 132 kv Silchar- PK Bari II 132 kv P K Bari - Kumarghat घटन क of & TSECL TSECL Silchar t :42 Dullavcherra DP, ZI, B-E t :46 3:04 13 Dullavcherra area of Assam was connected with rest of NER through 132 kv Silchar- Dullavcherra line(132 kv Dullavcherra-Dharmanagar line was under shutdown). At 13:42 Hrs on , 132 kv Silchar- Dullavcherra line tripped. Due to of this element, Dullavcherra area was separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.009) (प वव त त उत प न/ Antecedent : 1244, प वव त त ल ड/ Antecedent Load : 967 ) & TSECL TSECL & :37 Silchar DP, ZIII, R- Y-E t PK Bari t DP, ZIII, R- t Silchar Y-E PK Bari t PK Bari Earth Fault t Kumarghat t :12 11:12 0: :15 11:15 P K bari area of Tripura was connected with rest of NER through 132 kv P.K Bari - Silchar I & II lines, 132 kv P K Bari-Kumarghat line ( 132 kv P.K Bari - Ambasa, 132 kv Kamlpur- Ambasa & 132 kv Dhalabil - Agarthala lines kept open for system requirement & 132 kv Silchar-Dullavcherra line was not restored after ). At 10:37 Hrs on ,132 kv P.K Bari - Silchar I & II lines, 132 kv P K Bari-Kumarghat line tripped. Due to of these elements, P K Bari area was separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.012) (प वव त त उत प न/ Antecedent : 1160, प वव त त ल ड/ Antecedent Load : 879 ) :11 t t and 3 (e ) of Regulations Page 3 of 8

4 ई.एल. 24 द व र kv Agia - Nangalbibra I घटन क of 132 kv Loktak - Ningthoukhong घटन क of 132 kv Silchar - Dullavcherra घटन क of MePTCL AEGCL & MePTCL DP, ZI, R-Y- t Agia E :08 Nangalbibra t 35 Loktak t applicable Ningthoukhong Over current t applicable Silchar t :29 Dullavcherra DP, ZI, B-E t :30 0:22 Nangalbibra area of Meghalaya was connected with rest of NER through 132 kv Agia-Nangalbibra line (132 kv Nangalbibra-ngstoin line kept open for system requirement). At 13:08 Hrs on , 132 kv Agia-Nangalbibra line tripped. Due to of this element, Nangalbibra area of Meghalaya was separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.013) (प वव त त उत प न/ Antecedent : 1143, प वव त त ल ड/ Antecedent Load : 843 ) MSPCL NHPC & MSPCL : :13 0:22 Ningthoukhong area of Manipur was connected with rest of NER through 132 kv Loktak-Ningthoukhong line (132 kv Imphal(PG)-Ningthoukhong line & 132 kv kakching-kongba line kept open for system constraint). At 21:51 Hrs on , 132 kv Loktak-Ningthoukhong line tripped. Due to of these elements, Ningthoukhong area was separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.013) (प वव त त उत प न/ Antecedent : 1805, प वव त त ल ड/ Antecedent Load : 1460 ) Dullavcherra area of Assam was connected with rest of NER through 132 kv Silchar- Dullavcherra line(132 kv Dullavcherra-Dharmanagar line kept open for system requirement). At 03:29 Hrs on , 132 kv Silchar- Dullavcherra line tripped. Due to of this element, Dullavcherra area was separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.007) (प वव त त उत प न/ Antecedent : 1222, प वव त त ल ड/ Antecedent Load : 792 ) :11 6:42 t t t and 3 (e ) of Regulations and 3 (e ) of Regulations Page 4 of 8

5 8 132 kv Balipara - Khupi घटन क of NEEPCO & NEEPCO ई.एल. 24 द व र DP, ZI, R-Y- t Balipara E : :02 3:55 t t 24 Khupi Khupi area of Arunachal Pradesh was connected with rest of NER through 132 kv Balipara- Khupi line. At 09:07 Hrs on ,132 kv Balipara- Khupi line tripped. Due to of this element, Khupi area was separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.109) (प वव त त उत प न/ Antecedent :1227, प वव त त ल ड/ Antecedent Load : 1078 ) t Page 5 of 8

6 List of Disturbances below 10 Page 6 of 8

7 ई.एल. 24 द व र B. Disturbance below 10 : 132 kv Silchar - Dullavcherra 1 घटन क of :19 Silchar DP, ZI, R-E t Dullavcherra t applicable Dullavcherra area of Assam was connected with rest of NER through 132 kv Silchar- Dullavcherra line(132 kv Dullavcherra-Dharmanagar line was under shutdown). At 05:19 Hrs on , 132 kv Silchar- Dullavcherra line tripped. Due to of this element, Dullavcherra area was separated from rest of NER and subsequently collapsed due to no source in this area.(load loss in MU:0.005) (प वव त त उत प न/ Antecedent : 1350, प वव त त ल ड/ Antecedent Load : 1155 ) :44 0:25 t Page 7 of 8

8 The following numbers of Disturbances(GD) occurred in NER during the period w.e.f 01st vember, 2015 to 30th vember, 2015 A. Control area-wise Control Area Disturbance in nos 1 Palatana 0 2 AGBPP 0 3 AGTPP 0 4 Ranganadi 0 5 Kopili 0 6 Khandong 0 7 Doyang 0 8 Loktak 0 9 Arunachal Pradesh 1 10 Assam 3 11 Manipur 3 12 Meghalaya 1 13 Mizoram 0 14 Nagaland 0 15 Tripura 1 B. As per of GD Disturbance in nos 1 GD GD GD GD GD 5 0 Page 8 of 8

STATION OWNER UNIT NO. UNIT CAPACITY (MW) TYPE

STATION OWNER UNIT NO. UNIT CAPACITY (MW) TYPE Updated on 20.06.2011 LIST OF UNITS IN NER THAT REQUIRE APPROVAL OF OCC AS WELL AS NERLDC FOR PLANNED SHUT DOWN & MANUAL DESYNCHRONISATION / SYNCHRONISATION. TRIPPING OF THESE UNITS ALSO NEED TO BE INTIMATED