Power Quality Improvement of an Interconnected Grid System Using PWM Technique of D-STATCOM

Electrical distribution systems are witnessing the increase in nonlinear loads with the increased demand for power electronics devices. Such non-linear loads draw distorted currents that degrade the power quality of distribution systems. This paper presents the schematic procedure of the modeling and simulation of the Distribution Static Compensator (DSTATCOM) for power factor improvements. It is important to establish a means of providing reactive power compensation near the distribution side. This article presents the use of a D-STATCOM for compensation of harmonics in distribution systems. It describes the methodology of designing controllers based on DQ method. The current regulator control with two-input two-output for the AC side of a voltagessourcesconverter (VSC) can be represented by a transfer function with single–input–single–output. The proposed shunt controller is based on the VSC topology which generates controllable current directly at its output terminal. All responses are carried out using MATLAB/SIMULINK toolbox.