PI Controlled Synchronization Converter using SHO in Grid-Interactive Three-Phase Solar PV System

The world is gradually upgrading from thermal power generation to non-conventional resources, say wind, geothermal, and solar photovoltaic (PV) as a generation unit. In this manuscript, the solar PV system has been studied. The PV system has some inherent challenges when connected to a grid system or in stand-along mode, deciding parameters for its controller, keeping the DC-link voltage at the desired level, synchronising through the point of common coupling (PCC) with the grid system. This manuscript deals with stabilising the DC-link voltage of the inverter by PI controller parameters selection using the selfish herd optimiser (SHO). In this paper, IEEE 5 bus is taken as a test case, and the PV-solar system has its local linear and non-linear loads. The performance of the proposed approach is tested on the MATLAB Simulink platform under different test conditions and with a variation of solar irradiation and temperature.