PV Operated DSTATCOM for Power Quality Enhancement for the Three Phase Four Wire Distribution System

Abstract

This research work provides a detailed study of power quality issues in a three-phase four-wire system caused by nonlinear load penetration at the distribution side. Non-conventional sources, primarily photovoltaic cell, is directly connected to the Static synchronous compensator (DSTATCOM) at the side of the DC-link capacitor to maintain the constant voltage required by the Voltage source converter, i.e. DSTATCOM, which improves overall power quality issues within the distribution system. Unbalanced loads, a high reactive power burden, and poor voltage control are common issues of three-phase three-wire and three-phase four-wire systems. But the most significant issue in the three-phase system's four-wire distribution system is neutral current. The effectiveness of DSTATCOM over other custom power devices for improving power quality is determined by the use of control algorithms. A control algorithm suitable for a static synchronous compensator for determining power quality is developed. The analysis is carried out using the synchronous reference frame (SRF) method. Nowadays, Renewable Energy (RE) based power quality enhancement approaches are of considerable interest to many researchers; this work describes a comprehensive evaluation of a Distribution Static Compensator operated with a solar photovoltaic system. This research addresses the photovoltaic fed three-leg static synchronous compensator (PV DSTATCOM) for enhancing power quality.