Active Power Control For A Single-Phase Grid-Connected PV System

This research presents a simulation modelling for the development of active power control for photovoltaic single-phase inverter gridconnected system. The inverter system model and its control strategies are carried out in MATLAB/SIMULINK environment, utiliz ing SPWM with bipolar switching scheme signals for switching inverter devices (IGBTs) to generate (50Hz) pure sine wave. Fuzzy logic controller is used to regulate the active power flow for both modes of operations namely isolated and grid-connected mode according to the load power demand. The inverter provides power not only to the local loads but also feeds the available excess power to the grid. The simulation was carried out to facilitate the real PV power transfer to the local loads and grid. With the excellent results of 2.07% in the total harmonic distortion (THD) of output voltage, suggests that the proposed control system exhibits a good performance. The simulation results waveforms such as AC output voltages, current and system power flow are presented to validate the efficacy of the control system.