05-12-2012, 06:23 PM
HVDC Systems in India
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Advantages of HVDC
Controlled Power Exchange
Improve stability of AC system
Transmission at Reduced Voltage
Minimize power reduction in case of pole outage
Benefits at low ambient temperature
Asynchronous link
System Salient Features
±500kV,1500MW HVDC Bi-Pole Transmission link
supplies Bulk Power from Thermal Power Plant of
Rihand (Eastern part of Northern Grid) to Dadri
(Western part of Northern Grid).
Each pole continuous power carrying capacity is 750
MW with 10% two hours overload and 33% five
seconds overload capability .
Reverse power flow capability available.
During inclement weather condition power
transmission is possible at ±400 kV DC voltage.
System Salient Features:
(i) It connects Vindhyachal Super Thermal Power Stations (Western
Region) to Singrauli Super Thermal Power Stations (Northern Region) in
Indian Grid.
(ii) Each Block power carrying capacity is 250 MW.
(iii) Bidirectional power flow capability is available.
(iv) The project achieve load diversity of Northern and Western region in Indian Grid
by meeting high demand from surplus power available in either regions
(v) First commercial Back to Back HVDC Station in India