Analysis and application of dynamic Var compensator based on voltage source converter

摘要

In this paper a novel rapidly dynamic Var compensator based on voltage source converter (VSC)is proposed. Sinusoidal pulse width modulation(SPWM)controlled voltage source converter(VSC)is employed in this compensator in order to regulate the compensation reactor voltage and output continuous inductive reactive power. With this compensator, the harmonics issue of thyristor controlled reactor(TCR)is overcome and the capacity of the inverter is only 25% of the rated capacity. And a reactive power compensation equipment is proposed comprising the novel compensator and a series of thyristor switched capacitor(TSC). By adopting the proposed design, the capacity of dynamic Var compensation could be reduced greatly as well as realizing the bi-directionally continuous compensation of reactive power.