Static reactive compensator can improve the system reactive power imbalance problem,improve power quality,maintain voltage stability.However,the static reactive compensator composed of three-phase bridge circuit has the characteristics of high switching frequency and high harmonic content,which can easily lead to harmonic pollution in power grid.The static reactive compensator based on the multiplex structure can be superimposed in se-ries by N bridge converters through phase-shifting mode.With the more superimposed number,the more level of its output voltage,the higher the sinusoidal degree and the lower the harmonic content.The static reactive compensator based on multiplicative superposition technology usually includes converter,transformer and capacitor.This paper introduces the topology of the static reactive compensator based on the common transformer with different connection groups and the static reactive compensator based on the tortuous transformer.The simulation model is built by simu-lation software.The results show that the topology can output current with high fundamental wave content and adjust the power factor of the network side.
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