Comparative Study of Compact DPP Topologies for Partial Shading Mitigation of PV Modules

To address the power mismatch issues caused by partial shading in photovoltaic arrays, various differential power processing (DPP) architectures have been developed. This paper presents a comparative analysis of two compact and highly integrated topologies: switched capacitor converters (SCC) and PWM-integrated series resonant voltage multipliers (SRVM_PWM). These topologies demonstrate advantages in practical DPP photovoltaic systems due to their small footprint and simple control. The comparison focuses on total output power and module voltage equalization, validated through simulations under four mismatch scenarios. Results indicate that both SCC and SRVM_PWM achieve higher efficiency under slight-to-moderate mismatch conditions, with limited efficiency improvement under severe mismatch scenarios. SCC demonstrates superior voltage equalization performance under dynamic irradiation conditions.