高能效直流模塊式光伏發(fā)電系統(tǒng)性能評估:在住宅和建筑集成應(yīng)用中，光伏發(fā)電系統(tǒng)易受局部陰影和光照條件不同引起的光伏組件電氣參數(shù)失配的影響，導(dǎo)致系統(tǒng)的能量轉(zhuǎn)化效率較低，甚至可能形成熱斑，損壞組件。為了提高光伏發(fā)電系統(tǒng)在陰影和失配條件下的能效，保護光伏模組，本文提出了一種基于并聯(lián)直流模塊的光伏發(fā)電系統(tǒng)結(jié)構(gòu)，并與已有的串聯(lián)直流模塊和旁路直流模塊式光伏發(fā)電系統(tǒng)進行了比較分析，綜合評估了3 種高能效直流模塊式光伏發(fā)電系統(tǒng)的性能和特點。
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.
關(guān)鍵詞﹕光伏發(fā)電系統(tǒng)；直流模塊；局部陰影；最大功率點跟蹤
Keywords: photovoltaic power system; DC module; partial shading; maximum power point tracking