Inverter Control Strategy for Enabling Voltage and Frequency Regulation of Grid Connected PV System

摘要

Recent developments in the field of Photovoltaic (PV) technology have resulted in proliferation of PV systems integrated to the grid. In addition to all the cherished benefits of PV power as a renewable source, large scale grid connection has led to unprecedented challenges that are being faced by utilities. One of the most serious issues with greater percentage of PV generation is that as these do not participate in grid frequency or voltage regulation, even a small perturbation in frequency or voltage may result in a disaster leading to total blackout. This paper proposes a novel control algorithm for the PV inverter in order to enhance the performance of grid connected PV system. The incorporated algorithm for inverter control is based on the synchroconverter which offers the advantages of inertia & damping and enables the inverter to regulate the voltage and frequency. Simulated results obtained for the applied control scheme in MATLAB/Simulink platform are presented that shows the inverter capability to respond effectively for the grid side fluctuations.