Study on the Effects of Dynamic Partial Shading on PV DC-DC Boost and Super-Lift Luo Converter

Dynamic partial shading significantly impacts the performance and stability of photovoltaic (PV) systems, particularly the efficiency of DC-DC converters. This paper presents a comprehensive study on the effects of dynamic partial shading on two widely used converters: the Boost converter and the Super-Lift Luo converter. By simulating a series-parallel configuration of a 9-module PV array under dynamic shading scenarios such as passing airplanes and moving clouds, we assess the converters' transient responses and steady-state performance. Our analysis reveals critical insights into the voltage output stability and response time of non-isolated DC/DC converters under varying irradiance levels. We also explore the recovery time to stable states following sudden shading events. Performance metrics indicate that the Luo converter exhibits superior stability compared to the Boost converter, demonstrating its robustness in environments with frequent shading.