Standalone PV-BES-DG Based Microgrid with Power Quality Improvements

A standalone solar photovoltaic (PV)- battery energy storage (BES)- diesel generator (DG) based microgrid system is presented in this paper. The BES is integrated directly to the DC link of the voltage source converter (VSC). This system functions PV array maximum power extraction along with improvement of power quality such as harmonics elimination, reactive power compensation and balancing of DG currents. The PV array is integrated to the DC link of the VSC through a DC-DC boost converter. An automatic voltage regulator (AVR) is used to regulate the output voltage of the DG to the desired value. The performance of the standalone hybrid microgrid is studied under various operating conditions in the laboratory environment.