Improvement of power quality in distribution system using d-statcom

Abstract

Distribution system, as the name suggest, is the medium through which power is distributed among the end consumers. Power quality pollution at the load end is in the form of voltage/current waveform distortions, long/short duration voltage variations and poor load power factor. Amongst the various distribution FACTS controllers, distribution static compensator (D-STATCOM) is an important shunt compensator which has the potential to solve any power quality problems faced by distribution system. It provides effective compensation to unbalance and non-linear loads by injecting appropriate reactive power at the point of common coupling (PCC). In this paper we have designed two controllers. One is Synchronous Reference Frame based current controller and another one is Hysteresis Band Current Control to mitigate the harmonics due to unbalanced and nonlinear load. The investigation is carried out using MATLAB-SIMULINK power system block set.