Vizag II

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A tie between the Eastern and Southern networks in India.

The Power Grid Corporation of India Ltd. (Powergrid) has built a second 500 MW back-to-back HVDC project at Vizag to enable increased power interchange between the Eastern and Southern region. The first back-to-back HVDC project at Vizag was put in service in 1999. Powergrid signed a contract with ABB for Vizag II in September 2002 (Press release), and the project entered into commercial operation in February 2005.

The Vizag II HVDC project is installed at Gazuwaka, located at Vishakhapatnam on India's southeast coast. Located beside an existing HVDC station, it increases the capacity for high voltage power exchange between the eastern and southern power grids by 500 MW. In addition, the system provides voltage and frequency support for both grids during power disturbances.

Main data
Commissioning year:	2005
Power rating:	500 MW
No. of poles:	1
AC voltage:	400 kV (both sides)
DC voltage:	176 kV
Type of link	Back-to-back station
Main reason for choosing HVDC:	Asynchronous networks