Power Quality Improvement of Grid Connected PV System

Abstract

The two stage three phase grid connected solar photovoltaic (SPV) system is used to power quality improvement using LCL filter under linear and unbalance load. The DC-DC power converter and DC-AC power converter is used to interfaced between the SPV and grid. Solar PV system is constructed by simplified single diode model (SSDM). The maximize the SSDM solar PV output voltage by using maximum power point (MPP) technique to switching of DC-DC power converter for boosting the SPV voltage. A three phase DC-AC power converter is used to convert boosted DC into AC and fed into the grid. To control the DC-AC power converter is used to controller by abc to dq, PLL, PI controller and PWM technique. The power quality improvement using LCL filter measure by FFT analysis in MATLAB/SIMULIK. The above effectiveness control of proposed technique of grid current THD is validate using simulation results.