Review of Thyristor Control Series Capacitor Devices installed in India
Keywords:
TCSC, Series Compensation, Power oscillation damping (POD), Subsynchronous resonance (SSR), Interarea oscillationsAbstract
Power System in India spreads over five regions namely Eastern, Western, Northern, Southern and NorthEastern. The paper focuses on detailed study of the thyristor controlled series capacitors (TCSC) installed in India on
400 kV transmission lines. Rourkela-Raipur 400 kV double circuit link between Eastern and Western Regions is planned
to operate both region in synchronization. Purnea – Muzaffarpur and Muzaffarpur – Gorakhpur 400 kV Double circuit
are also using TCSC. Power Transfer capability of 400 kV long transmission line is restricted by the stability limit which
is less compared to the thermal capability of the line. Series compensation in the transmission lines have been
successfully employed in electric power networks. With the beginning of thyristor control, the idea of series
compensation has been expanded and its utility has been increased further. Using series compensation, increase in the
transfer capability of existing power transmission systems can be achieved at a lower investment cost. Installation time
can also be saved compared to the building of additional new lines. By series compensation systems using TCSC,
additional benefits like dynamic power flow control, prospect for power oscillation damping, as well as damping of subsynchronous resonance (SSR) can be obtained.
