Nangalbibra - Bongaigaon Transmission Limited

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Information Sterlite Power has come up with Nangalbibra - Bongaigaon Transmission Limited with a ticket size of 560 INR Crores. This project in Electricity Transmission sub-sector involves The current status of the project is Not Applicable Economic/Social Impact of the Project Presently, the state of Meghalaya has one 400/220 kV S/s at Byrnihat [MePTCL] and one 132kV S/s at Khlierhat [POWERGRID]. Both of these ISTS substations are on eastern part of Meghalaya. Due to increasing power demand and for providing reliable power supply in the western part of Meghalaya, necessity of 220kV grid substation in the East Garo Hills district of western Meghalaya was felt to further strengthen its interconnection with grid, which is presently connected through 132 lines in radial manner. System Studies have been carried out for 2022-23 timeframe. The anticipated peak demand of Meghalaya for 2022-23 timeframe is 478MW and the envisaged installed capacity of about 360MW, majority of these are from hydro generations. In low Hydro scenarios, the dispatch from these stations are expected to be limited to about 180MW, thereby creating a deficit in the supply of about 300MW. Accordingly, to simulate the worst case, low hydro peak demand scenario has been chosen to study the requirement of additional connections to meet the growing demand of Meghalaya. Due to the proximity of Bongaigaon TPS from the western part of Meghalaya, a large quantum of power flows through BTPS - Agia - Medinipathar - Nangalbibra corridor making it N-1 non-compliant. Therefore, a new 220/132kV substation may be required at Nangalbibra which would be fed from Bongaigaon 400/220kV Substation through 400kV D/c line [initially operated at 220kV]. This interconnection would reduce the critical loading on BTPS - Agia 220kV D/c line of AEGCL and improve the voltage profile as well as reliability of power supply in the western part of Meghalaya. Further, for drawal of power from Nangalbibra [ISTS], MePTCL has planned to develop Nangalbibra [ISTS] - Nangalbibra [Meghalaya] 132kV [Single Moose] D/c line. In addition, MePTCL has planning to develop Nangalbibra [ISTS] - Mawngap 220kV D/c line so that Bongaigaon [POWERGRID] - Nangalbibra [ISTS] - Mawngap [MePTCL] - Byrnihat [MePTCL] - Bongaigaon [POWERGRID] ring would be completed for power transfer with reliablility. Considering future load growth, space for expansion of Nangalbibra [ISTS] 220/132kV S/s to 400kV at a later date would also be kept. The western most part of Meghalaya is connected through long radial line from Nangalbibra [MePTCL] - Rongkhon - Ampati - Phulbari 132kV link. For reliable supply of power and improved voltage profile in western most part of Meghalaya, a second source from Assam side through Hatsinghmari [AEGCL] - Ampati [MePTCL] 132kV D/c line may be required.