Power Quality Improvement of Distribution System using D-STATCOM

Abstract

This paper focuses on the improvement of the power quality that is being distraught by same elements that defines a power system namely reactive power need of load time to time and harmonic distortion due to some switching of power electronic devises as well, which are couple of many. MATLAB Simulink model is used to show the performance of D-STATCOM (Distribution Static Synchronous Compensator), which is dealing with a balanced reactive load which will introduce deficit in the reactive power of the system and a resistive inverter load which will introduce harmonics in the system. The effects of these loading condition before the D-STATCOM is connected and after it is connected are compared chronically, and the effects on Total Harmonic Distortion (THD) and on power factor as well. Altered form of Synchronous Reference Frame (SRF) theory is used in the controller of D-STATCOM which controls the compensating current at PCC. Simulation results shows the effectiveness of D-STATCOM in compensating reactive power following the improvement of THD as well as the sending end power factor.

Keywords: D-STATCOM, Synchronous Reference Frame, Power Quality, Sinusoidal Pulse Width Modulation (SPWM)