Performance evaluation of high-efficiency DC module photovoltaic power generation system: In residential and building integrated applications, photovoltaic power generation systems are susceptible to the mismatch of photovoltaic module electrical parameters caused by local shadows and different lighting conditions, resulting in low energy conversion efficiency of the system and even the formation of hot spots and damage to the components. In order to improve the energy efficiency of photovoltaic power generation systems under shadow and mismatch conditions and protect photovoltaic modules, this paper proposes a photovoltaic power generation system structure based on parallel DC modules, and compares and analyzes it with existing series DC modules and bypass DC module photovoltaic power generation systems, and comprehensively evaluates the performance and characteristics of three high-efficiency DC module photovoltaic power generation systems. Abstract: Photovoltaic power system for the residential and building integration application is sensitive to the mismatch of electrical parameter due to the partial shadows and different illumination condition. As a result, the yield of the system decreases remarkably, in severe cases, the hot-spot problem can arise and the photovoltaic modules can be irreversibly damaged. In order to maximize the energy converter efficiency under the partial shadows and mismatch condition, a novel photovoltaic power system based on paralleled DC module is proposed. Detailed comparison and analysis of the proposed system and existing bypass and cascaded DC-module-based system are presented and the performance and characteristic of these systems are evaluation.Keywords: photovoltaic power system; DC module; partial shading; maximum power point tracking
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