The successful commissioning of Nangalbibra-Bongaigaon transmission (400 kV D/C) line will enable seamless transfer of over 1000 MW of electricity between Meghalaya and Assam. It will also decongest the downstream networks in the region, improving the quality and reliability of power supply in North-East India.
Feb 17, 2025
Sterlite Power has announced the successful commissioning of the Nangalbibra-Bongaigaon transmission (400 kv D/C) line, an Inter-State Transmission System (ISTS) project.
Through its Special Purpose Vehicle (SPV) execution, the project, spanning approximately 300 cktkm of transmission lines, strengthens the power infrastructure in the region and ensures reliable electricity supply in Meghalaya.
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It includes a greenfield substation with a 300 MW transformation capacity across the challenging North-Eastern terrain of Assam and Meghalaya, along with a 123 km, 400 kV D/C transmission line connecting Bongaigaon in Assam to a greenfield substation at Nangalbibra in Meghalaya, initially operated at 220 kV and crossing the Brahmaputra River.
The Nangalbibra 220/132kV substation has 2x160MVA transformation capacity and can be expanded to 400kV in the future to meet rising load demands. A 132kV D/C transmission line (19 km) further connects Hatsinghmari in Assam to Ampati in Meghalaya for an additional power source to the region.
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According to Mr. Arun Sharma, CEO, Infrastructure Business, Sterlite Power, “The successful commissioning of this project is a crucial step towards strengthening the power infrastructure of North-East India. By enabling the seamless transfer of over 1000 MW of electricity, this project will significantly improve accessibility in Meghalaya and Assam, supporting the region’s industrial, commercial, and socio-economic growth and the overall quality of life. The transmission project will not only help bridge existing power gaps but also lay the groundwork for future expansion, thereby attracting investments, creating jobs and driving infrastructure growth. As India moves toward a more resilient and sustainable energy landscape, we are committed to reinforcing the national grid and accelerating economic progress.”
The project also decongests the downstream networks in the region, improving the quality and reliability of power supply in North-East India. Awarded through tariff-based competitive bidding in December 2021, the project was completed ahead of schedule, with all necessary approvals obtained and key elements commissioned between September and November 2024.
