SLIDING MODE CONTROL OFACTIVE POWER FILTERS IN THREE-PHASE FOUR-WIRE SYSTEM
XI Wei1,YIN Bo2,ZHAO Zi-yan3,ZHANG Yong-wei1 (1.Dept. of Electric Power Engineering,Huazhong University of Science and Technology,Wuhan 430074, Hubei Province,China;2.School of Electrical Engineering,Wuhan University,Wuhan 430072,Hubei Province, China;3.China Electric Power Research Institute,Beijing 100085,China)
A sliding mode control based active power filter for three-phase four-wire system is developed, the principle of this device and the strategy for sliding mode control are presented, the existence, stability and accessibility of the sliding mode are analyzed, in addition the quality of the developed sliding mode control is researched. The simulation results show that this control strategy possesses good performance to suppress the harmonics and is easy to implement.