The HVDC Sileru–Barsoor is a
high voltage direct current
A high-voltage direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC) for electric power transmission, in contrast with the more common alternating curren ...
transmission system between Sileru and Barsoor in India. It is in service since 1989 as the first HVDC line in the country. The HVDC Sileru–Barsoor is a bipolar HVDC with a voltage of 200 kV and a transmission rate of 400 megawatts.
The HVDC Sileru–Barsoor couples two asynchronously operated parts of Indian electricity mains over a long overhead line, which was originally a double-circuit 220 kV AC line from which three conductors are paralleled.
This HVDC line is not in use for a long time. On 1 January 2014, the NEW grid is synchronised with the Southern regional grid making this HVDC link redundant. 200 kV AC line of NEW grid can be directly connected to the 200 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
HVDC converter station
An HVDC converter station (or simply converter station) is a specialised type of substation which forms the terminal equipment for a high-voltage direct current (HVDC) transmission line.Arrillaga, Jos; High Voltage Direct Current Transmission, se ...
s can be shifted to elsewhere to export/import power from other countries.
These unused converter stations owned by APTransCo, can be used to generate hydro electricity from
Srisailam Dam
The Srisailam Dam is constructed across the Krishna River in Nagarkurnool district , Telangana and Nandyal district, Andhra Pradesh near Srisailam temple town and is the 2nd largest capacity working hydroelectric station in India.
The d ...
or
Nagarjuna Sagar Dam
Nagarjuna Sagar Dam is a masonry dam across the Krishna River at Nagarjuna Sagar which straddles the border between Nalgonda district in Telangana and Palnadu district in Andhra Pradesh. The dam provides irrigation water to the Nalgonda, Surya ...
hydro power stations when the water level in the reservoirs are below the minimum rated water head by generating power at lower/under frequency (< 50 Hz). The lower frequency power is converted to normal grid frequency power with these converter stations. Thus more water available in the dead storage of these reservoirs can be used for additional power generation to meet peaking demand in summer months.
Sites
See also
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APTransCo
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Vizag back to back HVDC converter station
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 ...
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Chandrapur back to back HVDC converter station
The Chandrapur back-to-back HVDC station is a back-to-back HVDC connection between the western and southern regions in India, located close to the city of Chandrapur. Its main purpose is to export power from the Chandrapur Super Thermal Power Sta ...
Reference list
HVDC transmission lines
Electric power transmission infrastructure in India
Energy in Andhra Pradesh
1989 establishments in Andhra Pradesh
2014 disestablishments in India
Energy infrastructure completed in 1989
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