局部阴影条件下光伏发电系统的优化设计  

The Optimization Design of Photovoltaic Power Generation System Under Partial Shading

作　　者：林冲[1] 陈清[1] 古涛[1] 张立学[1] 赵永彬[1] 

机构地区：[1]国电南京自动化股份有限公司,江苏南京210032

出　　处：《绿色科技》2015年第4期276-278,283,共4页Journal of Green Science and Technology

摘　　要：指出了遮挡是导致光伏阵列输出功率损失的主要原因,分别研究了串联和并联光伏阵列被遮挡后I-V和P-V特性曲线变化,详细分析了不同遮挡比例和位置对阵列输出功率的影响。结果表明:当光伏阵列或者阵列中部分组件受到间歇性遮挡时,输出伏安特性曲线呈现阶梯状,降低了光伏电池板的光电转化率,导致光伏系统发电效率下降,系统发电量降低。提出了适用性较广的光伏阵列优化设计方法,为光伏发电系统的工程设计提供有力的支持。Occlusion is the leading cause to the output power loss of photovoltaic array.The article studies the changes in the I-V and P-V characteristic curve of photovoltaic array in series and parallel after being occluded as well as analyzes the influence of different occlusion proportion and position on array output power.When photovoltaic arrays or some components of arrays are occluded at intervals,the output volt ampere characteristic curve presents a ladder pattern and reduces the photoelectric conversion rate of photovoltaic battery plate,which results in a decline in power generation efficiency of the photovoltaic system and a reduction of the generating capacity of system.The article proposes an applicable optimization design of PV array and provides strong support for the engineering design of PV power generation system.

关 键 词：部分遮挡 转换效率 功率输出 优化设计 

分 类 号：TM615[电气工程—电力系统及自动化]