Bongaigaon Substation is a 400/220kV substation located in Bongaigaon, Assam, India. The construction works on Bongaigaon Substation began in 2016. The project was commissioned in 2018.


The Bongaigaon Substation project is an upgrade substation being operated by Power Grid Corporation of India.

The designed voltage level of the project is 400/220kV, while the operating voltage level is 400/220kV. The step-in voltage of the substation is 400kV and the step-out voltage is 220kV. The substation capacity is 315MVA.

Bongaigaon Substation has received approval from Assam Electricity Regulatory Commission to undertake the works on the project.

Contractors involved

Sterling and Wilson Pvt was appointed by Power Grid Corporation of India to undertake design and construction works of the Bongaigaon Substation.

About Power Grid Corporation of India

Power Grid Corporation of India Ltd (Powergrid) a government owned Maharatna company, is an electricity transmission utility. It transmits and distributes electricity. The company owns and operates a network of transmission lines and carries out power transmission projects. Powergrid offers operations and maintenance services for transmission systems, consultancy services, smart grid and telecom services. It employs optical ground wire on power transmission lines to operate overhead optic fibre network and incorporates multifarious topology and environment technology to plan, coordinate and deploy transmission networks in India. The company serves customers in South Asia and Oceania.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.