Total elimination of harmonics in Grid-connected Solar Energy

Abstract

Different technologies to harvest solar energy worldwide are being exploited as the sun supply about 1.8x1011MW per year. The Photovoltaic (PV) distributed generators give a sustainable promise to the reliable electrical supply due to their environment-friendly character. IEEE 519-1992 and IEEE 15472003 must be fulfilled to integrate DRs into the grid. However, the power electronics devices (PEDs), converters are to connect the photovoltaic grid-connected systems to the power network and to regulate the voltage and frequency output of PV panels that might change due to the weather variation, are the harmonics producers in the electrical power system. Maximum Power Point Techniques impact the harmonics in PV grid-connected system; P&O algorithm is used to extract the maximum power output from PV array. The Hybrid Active Power Filters (HAPFs) with different control strategies of Active Power Filter to eliminate the harmonics in PV distributed generators connected to the grid but the authors considered the grid voltages as balanced, this makes the implementation of this control strategies quite difficult. The proposed control strategies of Modified p-q theory PLL circuit controls the active power filter of HAPF designed in this work reduces THD from 30.65% to 1.58% in MATLAB/Simulink.