1. Pallatana-Bongaigaon Transmission System

2. 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. 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. 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. 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

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8. 8 Minimum Trans. System required with 1 st 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)

9. 9 Trans. System likely to be commissioned with 2 nd 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

10. 10 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

11. 11 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

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