Implementation of an anti-windup control under partial shading for a photovoltaic grid interfaced system

Abstract Owing to the growing technological advancements in control startgies for addressing the various power quality issues in distributed generation systems, an anti-windup control strategy for reducing the impact of partial shading is proposed in this present work. The performance of a Solar Photovoltaic (SPV) grid interfaced system is evaluated during the presence of a single phase to ground fault. Majorly, the SPV array is also operated under partial shading conditions by changing levels of solar radiation and ambient temperature conditions. The performance of a Proportional Integral (PI) anti-windup controller is justified by demonstrating the flow of active-reactive power with minimum levels of harmonics. This controller has ably demonstrates its effectiveness in mitigating the impact of partial shading. The validated data sheet SPR-305-WHT is used to validate the obtained results. Total Harmonic Distortion (THD) levels are estimated at various coipling points. It is revelaed that the THD levels of grid current at Point of Common Coupling (PCC) are less than 5%. According to IEEE-519 standard, the level of harmonics must be less than 5%. Overall, the proposed scheme can be helpful for future research engineers and professionals working on improving various power quality aspects.