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SPS Schemes for Grid Security (With Generation at Palatana)

SPS Schemes for Grid Security (With Generation at Palatana). Case 1: When Palatana unit trips Case 2: 400 kV Palatana-Silcher (D/C) lines trip Case 3: 400 kV Silchar – Byrnihat line trips. Initial Conditions :. Pre condition : Following lines should be kept in open condition

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SPS Schemes for Grid Security (With Generation at Palatana)

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  1. SPS Schemes for Grid Security (With Generation at Palatana) Case 1: When Palatana unit trips Case 2: 400 kV Palatana-Silcher (D/C) lines trip Case 3: 400 kV Silchar – Byrnihat line trips

  2. Initial Conditions : • Pre condition: • Following lines should be kept in open condition • 132 kV Khliehriat – Lumshnong S/C • 132 kV Pailapool – Jiribam line at Jiribamend • 132 kV Khleihriat (PG) – Khliehriat (Me) D/C (Based on Leshka Generation and System Conditions) Load (Drawal from Grid) in Southern Part of NER : Peak South Assam : 100 MW Manipur : 115 MW Mizoram : 75 MW Tripura : 145 MW Meghalaya : 15 MW (Lumshnong load) Total : 440 MW ISGS Generation in Southern Part of NER : Peak AGTPP : 75 MW Loktak : 105 MW Palatana : 350 MW Total : 530 MW

  3. Line Flow in Initial Conditions System Requirement Khliehriat (PG) Khandong Kopili NEIGRIHMS 34 MW Palatana Khliehriat (Me) Byrnihat Nehu Shall be kept open 10 MW Lumsnong 350 MW 15 MW Panchgram 6 MW 90 MW 19 MW 35 MW Badarpur (PG) Silchar Udaipur S. Nagar Srikona Dullavchera 72 MW 25 MW Pailapool Dimapur(PG) Dharmanagar 20 MW 1 MW Jiribam(PG) Shall be kept open Imphal(PG) Kumarghat(PG) 75 MW P K Bari Loktak(NH) AGTPP(NO) 105 MW

  4. Case 1: When Palatana unit trips (PEAK Case) • Scheme: • When generator at Palatana trips a signal will be generated from trip relay of the unit. • This signal should trip the CB of 132 kV Silchar – Srikona D/C & 132 kV Silchar – Panchgram lines at Silchar. • Subsequently, tripping of 132 kV Silchar – Panchgram line a signal will be generated from trip relay of 132 kV Silchar –Panchgram line. This signal should trip the CB of 132 kV Badarpur – Panchgram line at Badarpur. • After these trippings a instant load relief of 60 MW at off-peak & 105 MW in peak which will avert the system from cascade tripping • Then manual demand disconnection should be imposed. Load ReliefOff-PeakPeak Srikona : 15 MW 25 MW Pailapool : 10 MW 20 MW Panchgram: 20 MW 35 MW Lumsnong : 15 MW 25 MW Total 60 MW 105 MW

  5. Line Flow After Tripping of Palatana Module-1 (350 MW) System Requirement Khliehriat (PG) Khandong Kopili NEIGRIHMS 59 MW Palatana Khliehriat (Me) Byrnihat Nehu Shall be kept open 82 MW Lumsnong 15 MW Panchgram 53MW 143 MW 35 MW Badarpur (PG) Silchar Udaipur S. Nagar Srikona Dullavchera 50 MW 25 MW Pailapool Dimapur(PG) Dharmanagar 20 MW 27 MW Jiribam(PG) Shall be kept open Imphal(PG) Kumarghat(PG) 75 MW P K Bari Loktak(NH) AGTPP(NO) 105 MW

  6. Line Flow After SPS Operation System Requirement Khliehriat (PG) Khandong Kopili NEIGRIHMS 28 MW Palatana Khliehriat (Me) Byrnihat Nehu Shall be kept open 54 MW Lumsnong CB shall trip 15 MW When generator trips signal will be generated from trip relay of the unit Panchgram A signal will be generated from trip relay of 132 kV Silchar –Panchgram line 80 MW CB shall trip 35 MW Badarpur (PG) Silchar Udaipur S. Nagar Srikona Dullavchera CB shall trip CB shall trip 25 MW Pailapool Dimapur(PG) Dharmanagar 20 MW 16 MW Jiribam(PG) Shall be kept open Imphal(PG) Kumarghat(PG) 75 MW P K Bari Loktak(NH) AGTPP(NO) 105 MW

  7. Case 2: When 400 kV Palatana-Silchar (D/C) lines trip (PEAK Case) • Scheme: • When both the ckts of 400 kV Palatana – Silchar lines trip, a signal will be generated from trip relays at Silchar • This signal should trip the CB of 132 kV Silchar – Srikona D/C & 132 kV Silchar – Panchgram lines at Silchar. • Subsequently, tripping of 132 kV Silchar – Panchgram line a signal will be generated from trip relay of 132 kV Silchar –Panchgram line. This signal should trip the CB of 132 kV Badarpur – Panchgram line at Badarpur. • After these trippings a instant load relief of 60 MW at off-peak & 105 MW in peak which will avert the system from cascade tripping • Then manual demand disconnection should be imposed. Load ReliefOff-PeakPeak Srikona : 15 MW 25 MW Pailapool : 10 MW 20 MW Panchgram: 20 MW 35 MW Lumsnong : 15 MW 25 MW Total 60 MW 105 MW

  8. Line Flow After Tripping of 400kV Silchar-Palatana D/C System Requirement Khliehriat (PG) Khandong Kopili NEIGRIHMS 86 MW Palatana Khliehriat (Me) Byrnihat Nehu Shall be kept open 92 MW Lumsnong 350 MW 15 MW Panchgram 38MW 132 MW 35 MW Badarpur (PG) Silchar Udaipur S. Nagar Srikona Dullavchera 54 MW 25 MW Pailapool Dimapur(PG) Dharmanagar 20 MW 43 MW Jiribam(PG) Shall be kept open Imphal(PG) Kumarghat(PG) 75 MW P K Bari Loktak(NH) AGTPP(NO) 105 MW

  9. Line Flow After SPS Operation System Requirement Khliehriat (PG) Khandong Kopili NEIGRIHMS 35 MW Palatana Khliehriat (Me) Byrnihat Nehu Shall be kept open 56 MW Lumsnong 350 MW CB shall trip 15 MW When both the ckts of 400 kV Palatana – Silchar lines trip, signal will be generated from trip relays at Silchar Panchgram A signal will be generated from trip relay of 132 kV Silchar –Panchgram line 75 MW CB shall trip 35 MW Badarpur (PG) Silchar Udaipur S. Nagar Srikona Dullavchera CB shall trip CB shall trip 25 MW Pailapool Dimapur(PG) Dharmanagar 20 MW 20 MW Jiribam(PG) Shall be kept open Imphal(PG) Kumarghat(PG) 75 MW P K Bari Loktak(NH) AGTPP(NO) 105 MW

  10. Case 3: When 400 kV Silchar – Byrnihat S/C line trips (OFFPEAK Case) • Scheme: • When 400 kV Byrnihat – Silchar lines trip, signal will be generated from trip relays at Silchar • This signal should trip CB of GTG/STG of at Palatana.But unit will be running in FSNL • A instant reliefin line loading of 230/130 MW which will avert the system from cascade tripping. • Then manual demand disconnection should be imposed. Load ReliefOff-PeakPeak Srikona : 15 MW 25 MW Pailapool : 10 MW 20 MW Panchgram: 20 MW 35 MW Lumsnong : 15 MW 25 MW Total 60 MW 105 MW

  11. Line Flow After Tripping of Silchar - Brynihat System Requirement Khliehriat (PG) Khandong Kopili NEIGRIHMS 59 MW Palatana Khliehriat (Me) Byrnihat Nehu Shall be kept open 12 MW Lumsnong 350 MW 15 MW Panchgram 177 MW 20 MW Badarpur (PG) Silchar Udaipur S. Nagar Srikona Dullavchera 15 MW Pailapool Dimapur(PG) Dharmanagar 10 MW 1 MW Jiribam(PG) Shall be kept open Imphal(PG) Kumarghat(PG) 75 MW 34 MW P K Bari Loktak(NH) AGTPP(NO) 105 MW

  12. Line Flow After Tripping of Silchar - Brynihat System Requirement Khliehriat (PG) Khandong Kopili NEIGRIHMS 174 MW Palatana Khliehriat (Me) Byrnihat Nehu Shall be kept open 101 MW Lumsnong 350 MW 15 MW Panchgram 20 MW Badarpur (PG) Silchar Udaipur S. Nagar Srikona Dullavchera 15 MW Pailapool Dimapur(PG) Dharmanagar 10 MW 32 MW Jiribam(PG) Shall be kept open Imphal(PG) Kumarghat(PG) 75 MW 51 MW P K Bari Loktak(NH) AGTPP(NO) 105 MW

  13. Line Flow After SPS Operation System Requirement Khliehriat (PG) Khandong Kopili NEIGRIHMS ST-1 shall trip 94 MW When 400 kV Byrnihat – Silchar lines trip, signal will be generated from trip relays at Silchar Khliehriat (Me) Byrnihat Nehu Shall be kept open Palatana 39 MW 220 MW Lumsnong 15 MW Panchgram 35 MW Badarpur (PG) Silchar Udaipur S. Nagar Srikona Dullavchera 25 MW Pailapool Dimapur(PG) Dharmanagar 20 MW 9 MW Jiribam(PG) Shall be kept open Imphal(PG) Kumarghat(PG) 75 MW 43 MW P K Bari Loktak(NH) AGTPP(NO) 105 MW

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