Power quality analysis of grid - connected solar PV system under variable irradiance conditions

Environmental conditions and system design are the most critical aspects in the operation of PV systems, since both can have a considerable impact on the efficiency and power quality responsiveness of the entire system. Variable power flow owing to fluctuations in solar irradiation and temperature are two factors that affect photovoltaic system power quality. Under fluctuating irradiance, temperature, and load, this research explores potential power quality difficulties in a solar photovoltaic grid coupled system with three phase grids. As a result, this work develops a 10KWp solar PV system connected to a three-phase grid utilizing MATLAB/Simulink software and real-time data (irradiance and temperature) to investigate the degree of voltage and current harmonics under varying load situations. According to the simulation results, a decrease in received irradiance caused by a cloud climate can have a significant impact on the system's current THD.