Vindhyachal

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The first HVDC project in India.

The Indian power system is demarcated into five independent regional grids namely: Northern, Eastern, Western, Southern, and North-eastern Regions. The 500 MW Vindhyachal back-to-back HVDC station interconnects the Northern and Western Regions.

The HVDC station was built by National Thermal Power Corporation (NTPC ) but after the reorganisation of the Indian power sector the transmission now belongs to the Power Grid Corporation of India Ltd..

Vindhyachal exterior with the world's first HVDC transformers with extended delta windings.

Inside one of the valve halls

The remote Vindhyachal region hosts three super-thermal projects of NTPC within a radius of 40 km: Singrauli, Rihand (supplying power to the Nortern grid) and Vindhyachal. Vindhyachal is the largest project of NTPC with a total capacity of 2,260 MW supplying power to the Western grid.

Main data
Commissioning year:	1989
Power rating:	500 MW
No. of poles:	2
AC voltage:	400 kV (both sides)
DC voltage:	70 kV
Type of link	Back-to-back station
Main reason for choosing HVDC:	Asynchronous networks