복수의 스트링을 포함한 태양광 패널에 적용 가능한 차동 전력 조절기의 조사량 적응형 동작 알고리즘

Abstract

The differential power processor(DPP) system is used to prevent a decrease in the total power generation due to the partial shading of the PV modules. Compared to traditional series strings and full power processing(FPP) converter solutions, the DPP converter system shows advantages in terms of modularization process, volume and transformation losses. However, there is a limitation in that the power generation process of differential power processors produces lower power under certain irradiation conditions. This paper proposes a structure, and operating algorithm for differential power processing modules that can use a single power converter for multiple strings. The operational algorithm for the differential power regulators allows the maximum power generation to be maintained in comparison with conventional series-connected and differential power processing methods even under various partial shading conditions. The operation algorithm of the proposed differential power processor is verified by Matlab/Simulink simulations.