MULTILEVEL INVERTER BASED STATCOM USING REACTIVE POWER THEORY FOR DIFFERENT LOAD CONDITIONS

Abstract

A static synchronous compensator is a regulating device used on alternating current electricity transmission networks. It is based on a power electronics voltage-source converter and can act as either a source or sink of reactive AC power to an electricity network. Usually a STATCOM is installed to support electricity networks that have a poor power factor and often poor voltage regulation. It designs a medium voltage reactive power compensation device on the basis of principle analyzing of STATCOM and carrier phase-shifted SPWM of multilevel inverter, and verifies its control algorithm. Simulation results are presented in order to validate the performance of the proposed observer applied to a cascade H-bridge multilevel-based STATCOM