Power Quality Improvement of PV-Wind-Battery Powered Standalone Hybrid System

Abstract

Hybrid standalone power supply system’s especially operating with renewable energy sources are becoming popular and establishing in many places worldwide. Two major renewable energy sources for electricity generation are solar and wind. Usually Photovoltaic modules (PVMs) are using for producing electricity from solar energy and in the similar way, PMSG based wind power conversion systems are becoming popular for medium power ranges. Therefore, a standalone hybrid system consisting of PVMs, wind, and battery can ensure a reliable power supply to various loads. The combination of these energy sources, along with the battery storage system, offers a flexible and dependable power supply to consumers at all times. This innovative approach involves the implementation of a novel control technique in a microgrid setup to uphold power quality at the PCC. The system integrates devices for maximizing power point to improve energy utilization efficiency. A DC to DC bidirectional circuit connects the battery bank unit (BBU) to the system to efficiently regulate energy. The bidirectional DC to DC circuit controls the dc-link voltage by accurately managing the discharging and charging of the battery. The three-phase inverter is situated between the AC loads and dclink, designed with a control system that ensures a constant RMS voltage at the PCC, regardless of changes in load and energy sources. MATLAB platform is used to present the results under various case studies in this paper.