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Pallatana-Bongaigaon Transmission System

Pallatana-Bongaigaon Transmission System. Generation Project Summary. Pallatana (726.6 MW) : being implemented by OTPC Unit - 1 : Dec-2011 Unit - 2 : March-2012 Bongaigaon (750 MW) : being implemented by NTPC Unit - 1 : July-2012 Beneficiaries Constituents of North Eastern Region.

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Pallatana-Bongaigaon Transmission System

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  1. Pallatana-Bongaigaon Transmission System

  2. Generation Project Summary • Pallatana (726.6 MW) : being implemented by OTPC • Unit - 1 : Dec-2011 • Unit - 2 : March-2012 • Bongaigaon (750 MW) : being implemented by NTPC • Unit - 1 : July-2012 • Beneficiaries • Constituents of North Eastern Region

  3. Pallatana - Bongaigaon Transmission System • Trans. System Under NETC (JV of OTPC, PG & NER States) • Pallatana – Silchar – Bongaigaon 400kV D/c line • Trans. System (Under POWERGRID) • BTPS - Bongaigaon 400kV D/c line • Silchar – Badarpur(PG) Sw. Stn. interconnecting 132kV D/c line • Silchar – Srikona 132kV D/c • Silchar – Hailakandi 132kV D/c • Pallatana - Surajmaninagar 400kV D/c line (charged at 132kV) • Silchar – P. K. Bari (TSECL) 400kV D/c line (charged at 132kV) • Silchar – Melriat (New) 400kV D/c line (charged at 132kV) • Melriat (New) – Melriat(Mizoram) interconnecting 132kV D/c line • Silchar - Imphal(New) 400kV D/c line (charged at 132kV) • LILO of Loktak- Imphal(PG) 132kV S/c line at Imphal(New) • LILO of Kathalguri-Misa 400kV (op. at 220kV) S/c at New Mariani

  4. Pallatana - Bongaigaon Transmission System • Trans. System (Under POWERGRID -Contd.) • Mariani(new)-Mokokchung (PG) 220kV D/c line • Mokokchung (PG)-Mokokchung (Naga) 132kV D/c (Zebra cond.) • Pasighat – Roing 132kV S/c line (on D/c tower) • Roing – Tezu 132kV S/c line (on D/c tower) • Tezu – Namsai 132kV S/c line (on D/c tower) • 2x200MVA, 400/132kV New S/s at Silchar • 2x50MVA, 132/33kV New S/s at Melriat New (upgradable to 400kV) • 2x50MVA, 132/33kV New S/s at Imphal New (upgradable to 400kV) • 220kV New Switching S/s at Mariani • 2x50MVA, 220/132kV New S/s at Mokokchung • 2x15 MVA, 132/33kV New S/s at Roing • 2x15 MVA, 132/33kV New S/s at Tezu • 2x15 MVA, 132/33kV New S/s at Namsai

  5. Pallatana - Bongaigaon Transmission System(under scope of other agencies) • NTPC • 400/220kV, 2x315MVA transformers at BTPS (NTPC) switchyard • 220kV Connectivity between NTPC and AEGCL switchyard • 2 nos. of 400kV line bays for BTPS – Bongaigaon 400kV D/c line • OTPC • 400/132kV, 2x100MVA transformers at Pallatana switchyard • 2 nos. of 400kV line bays for Pallatana-Silchar 400kV D/c line • 2 nos. 132kV line bays for Pallatana-Surajmaninagar 132kV D/c (upgrad. to 400kV) • 50MVAR line reactor in each ckt of Pallatana-Silchar 400kV D/c line at Pallatana end • 80MVAR bus reactor at Pallatana Generation Switchyard. • Assam • 2x315MVA, 400/220kV New Substation at Azara • LILO of Silchar-Bongaigaon 400kV D/c line at Azara • LILO of Agia-Guwahati 220kV D/c line at Azara • 63MVAR line reactor in Silchar-Azara 400kV line at Azara end • 63MVAR bus reactor at Azara • Meghalaya • LILO of one ckt of Silchar-Bongaigaon 400kV D/c line at Byrnihat • 2x315MVA, 400/220kV New Substation at Byrnihat • 50MVAR line reactor in Silchar-Byrnihat 400kV line at Byrnihat end • 63MVAR bus reactor at Byrnihat • Tripura • 2x50MVA, 132/33kV substation at Surajmaninagar (upgradable to 400kV) • Monarchak – Surajmaninagar 132kV D/c • Monarchak – Rabindranagar 132kV D/c • Surajmaninagar – P. K. Bari 400kV D/c to be charged at 132kV • 132kV S/s at Rabindranagar

  6. Minimum Trans. System required with 1st unit of Pallatana • Trans. System Under NETC (JV of OTPC, PG & NER States) • Pallatana - Silchar 400kV D/c line • Trans. System (Under POWERGRID) • Pallatana - Silchar 400kV D/c line • 2x200 MVA, 400/132kV new S/s at Silchar • Silchar - Badarpur(PG) 132kV D/c line • Silchar - Srikona (Assam) 132kV D/c line • Silchar - Hailakandi(Assam) 132kV D/c line with LILO of Panchgram-Dullabhchera 132kV S/c line of AEGCL to connected it with Silchar-Hailakandi 132kV D/c line so as to form Silchar - Panchgram and Pallatana - Silchar 132kV lines (as agreed in NERPC)

  7. Trans. System likely to be commissioned with 2nd unit of Pallatana (scheduled in March-2012) • Trans. System Under NETC (JV of OTPC, PG & NER States) • Silchar - Bongaigaon 400kV D/c line • Trans. System (Under POWERGRID) • Pallatana - Surajmaninagar 400kV D/c line (to be operated at 132kV) • Surajmaninagar – P. K. Bari 400kV D/c to be charged at 132kV • Trans. System (Under OTPC) • 2x100 MVA, 400/132kV ICT at Pallatana • Trans. System (Under Tripura Scope) • 2x50MVA, 132/33kV substation at Surajmaninagar (upgradable to 400kV) • Trans. System (Under Meghalaya Scope) • 2x315MVA, 400/220kV substation at Byrnihat alongwith LILO of one ckt. of Silchar – Bongaigaon 400kV D/c line Note : In absence of Byrnihat S/s, upto 500 MW can be evacuated through Silchar (2x200 MVA) and Pallatana (2x100 MVA) ICTs

  8. Major Concerns • Construction of new S/s at Surajmaninagar (Tripura) • Pallatana – Surajmaninagar 132kV D/c being constructed by POWERGRID to provide alternate path for evacuation as well as anticipated to be used for start-up power • New 2x50 MVA, 132/33kV S/s at Surajmaninagar required for termination of Pallatana – Surajmaninagar 132kV D/c • Awarded by Tripura, needs to be expedited. • Construction of new 400kV S/s at Byrnihat (Meghalaya) • 2x315 MVA, 400/220kV S/s at Byrnihat to established by LILO of one circuit of Silchar – Bongaigaon 400kV D/c line • Critical for smooth operation of 408 kms long Silchar – Bongaigaon 400kV section • MeSEB signed agreement with POWERGRID for construction of Byrnihat S/s as consultancy works • Scheduled to be completed in 30-36 months provided all formalities like release of payment, hand over of land etc. are completed at the earliest, which are still awaited

  9. Major Concerns • Construction of new 400kV S/s at Azara (Assam) • 2x315 MVA, 400/220kV S/s at Azara to established by LILO of Silchar - Bongaigaon 400kV D/c line • Critical for smooth operation of 408 kms long Silchar – Bongaigaon 400kV section • Activities for construction yet to be started by Assam • Strengthening beyond Bongaigaon • NER may have surplus during off-peak period (even though entire power from Pallatana & Bongaigaon have been allocated to NER states • Strengthening beyond Bongaigaon needs to be implemented promptly for reliable transfer of power • POWERGRID is implementing re-conductoring of Siliguri-Purnea 400kV D/c line, expected to be completed by March, 2012 • Bongaigaon – Siliguri & Purnea – Biharsharif 400kV D/c lines are being implemented under private sector and have been awarded to M/s Sterlite. Implementation of the same needs to be expedited

  10. Thank You

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