高能效直流模块式光伏发电系统性能评估

高能效直流模块式光伏发电系统性能评估:在住宅和建筑集成应用中，光伏发电系统易受局部阴影和光照条件不同引起的光伏组件电气参数失配的影响，导致系统的能量转化效率较低，甚至可能形成热斑，损坏组件。为了提高光伏发电系统在阴影和失配条件下的能效，保护光伏模组，本文提出了一种基于并联直流模块的光伏发电系统结构，并与已有的串联直流模块和旁路直流模块式光伏发电系统进行了比较分析，综合评估了3 种高能效直流模块式光伏发电系统的性能和特点。
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.
关键词﹕光伏发电系统；直流模块；局部阴影；最大功率点跟踪
Keywords: photovoltaic power system; DC module; partial shading; maximum power point tracking