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Operating Principle
The SVC can be seen as a dynamic reactive power source. It can supply capacitive reactive power to the grid or consume the spare inductive reactive power from the grid. Normally, the system can absorb the reactive power from a capacitor bank, and the spare part can be consumed by an air-core shunt reactor.
Typically, there is one or more banks of fixed or switched shunt capacitors or reactors in one SVC system, of which at least one bank is switched by thyristors. The widely applied elements in SVCs include: thyristor controlled reactor (TCR), thyristor switched reactor (TSR),thyristor switched capacitor (TSC), breaker switched capacitor/ filter capacitor (BSC/FC).
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