PERFORMANCE INVESTIGATION OF A HIGH INPUT POWER FACTOR CONVERTER APPLYING SPACE VECTOR MODULATION

Abstract

Due to the increase of non-linear loads in utility systems, the quality of power has attracted much attention in resent years. The low power factor and large harmonics line currents generated by rectifiers are well known problems that can lead to voltage distortion, and increase losses in the transmission and distribution lines. To overcome these problems active current wave shaping techniques have been developed to provide nearly sinusoidal source current. A SVMbased HCC for the three-phase PWM rectifier is proposed. This technique utilizes advantages of the HCC and SVM technique. This configuration reduces significantly the number of switching and at the same time gives the same state space vectors as those obtained from. the SVM technique. The proposal current controller confines state space vectors from a region detector and apply a proper space vector selected according to the HCC for better current shape. A set of state space vectors including the zero vectors is determined from the region detector made up of three comparators. Hard ware implementation circuits and software development have been discussed. Simulation and Experimental results have been discussed.