Powergrid Experience on Operation of 765 kV Transmission System

Indian Economy is growing in the range of 5%-8% per annum. Electricity is one of the key inputs for such sustained growth. The demand of electricity in India is expected to increase to more than 437,000 MW by 2027 in comparison to the present demand of about 125,000 MW. The primary energy resources for such massive requirement shall continue to be Coal and Hydro. Coal and Hydro resources are mainly located in Central/Eastern part and Northern/North Eastern part of India respectively whereas the loads are concentrated in the Western and Southern part of the country. This necessitates strong, reliable and long transmission network to transfer electricity to distant geographically spread load centers. Considering the above requirement, POWERGRID has taken up massive transmission network expansion plan by developing 765 kV Transmission system apart from +500 kV & 800kV HVDC system. In last 5 years, 19 Nos of 765 kV grid Sub-stations with 67000 MVA, 765/400 kV Transformers and 7300 ckms Transmission lines have been commissioned and are in operation. Apart from this, number of 765 kV Sub-Stations and Transmission lines are under construction and are being commissioned progressively.