Vizag back to back HVDC converter station
| Vizag back to back HVDC converter station | |
|---|---|
| Location | |
| Country | India |
| State | Andhra Pradesh |
| Coordinates |
17°38′33″N 83°07′57″E / 17.64250°N 83.13250°E 17°38′26″N 83°08′10″E / 17.64056°N 83.13611°E |
| From | Eastern Region |
| To | Southern Region |
| Ownership information | |
| Owner | Power Grid Corporation of India |
| Construction information | |
| Installer of substations | Alstom (Vizag 1), ABB (Vizag 2) |
| Commissioned | 1999, 2005 |
| Technical information | |
| Type | Back to Back |
| Type of current | HVDC |
| Total length | 0 km (0 mi) |
| Power rating | 2 x 500 MW |
| DC Voltage | 205 kV (Vizag 1); 176 kV (Vizag 2) |
| Number of poles | 2 |
The Vizag back to back HVDC station, or Visakhapatnam back to back HVDC station, is a back to back HVDC connection between the eastern and southern regions in India, located close to the city of Visakhapatnam, and owned by Power Grid Corporation of India.
It consists of two independent poles, each with a nominal power transmission rating of 500 MW, referred to as Vizag 1 and Vizag 2. Vizag 1 was built by Alstom between 1996 and 1999 and has nominal DC voltage and current ratings of 205 kV, 2475 A. Its design is very similar to that of the Chandrapur back to back HVDC converter station.
Vizag 2 was built by ABB between 2002 and 2005 and has nominal DC voltage and current ratings of 176 kV, 2841 A.
Both Vizag 1 and Vizag 2 use air-insulated, water-cooled thyristor valves.
On 1 January 2014, the NEW grid was synchronised with the Southern regional grid making this converter station redundant. 400 kV AC line of NEW grid can be directly connected to the 400 kV line of Southern grid bypassing the HVDC converter stations. Thus the energy losses taking place in the converter stations can be avoided and these stations can be dismantled and moved to elsewhere to export/import power from other countries.
Sites
| Site | Coordinates |
|---|---|
| Vizag 1 | 17°38′33″N 83°07′57″E / 17.64250°N 83.13250°E |
| Vizag 2 | 17°38′26″N 83°08′10″E / 17.64056°N 83.13611°E |