Investigation of the power control strategy for grid-connected photovoltaic inverter based on maximum power point

Abstract

Due to the high growing rate of the grid-connected PV systems recently, there is an interrupted power that will be grid injected, and this can increase the challenge for a system operator. Precisely, at a peak power production the overloading may be happening, so that a requirement of maximum available power to be delivered to the grid by a PV system all the time in most countries. The solution is with an advanced power control strategy that reduces the maximum power, delivering from a Photovoltaic generator (PVG). The proposed power control strategy concerns with an external voltage and internal current of the single phase inverter to control the DC-link voltage and to regulate the grid current. This inverter that designed for operating as a maximum power point (MPP) is modeled by Matlab/Simulink simulation to calculate the current panel at maximum power point for different irradiance and MPP power in addition to output voltage and grid Voltage.