摘要
根据光伏电池的转换特性,详细分析温度对光伏电池开路电压、短路电流、填充因子及转换效率的影响。并设计测试平台,对多晶硅光伏电池实际输出转换效率的温度特性进行了实验研究。结果表明,硅光伏电池输出开路电压随温度升高的减少率约为-2.3mV/K,理想填充因子随温度升高的减少率约为-4.5×10-4/K,短路电流随温度增加而增大,其随温度升高的增加率约为1.21mA/K。总体而言,光伏电池转换效率随温度增加而减少。同时,实验结果也证明多晶硅光伏电池实际输出效率随其温度升高的减少约为-0.22%/K,实验结果与理论分析基本一致。研究结果为光伏系统的优化设计提供了理论及实验基础。
Using conversion characteristics of photovoltaic （ PV） cells, the effects of temperature on open circuit volt-age, short circuit current, fill factor （FF） and conversion efficiency of PV cells are studied .Moreover, a test plat-form is designed to study the temperature characteristics of output efficiency for polysilicon PV cells .The results show that the decreasing rate of open circuit voltage and FF with temperature rise are -2.3mV/K and -4.5 ＆×10 -4/K re-spectively, and the increasing rate of short circuit current with temperature rise is 1.21mA/K.Thus, the conversion efficiency of PV cells decreases with temperature increase .In addition , experiment result also shows a -0 .22%/K decreasing rate of the output efficiency of polysilicon PV cells , which is consistent with theoretical analysis .The re-sults provide a theoretical and experimental basis for the optimal design of PV systems .
出处
《电测与仪表》
北大核心
2014年第17期62-66,共5页
Electrical Measurement & Instrumentation
基金
国家自然科学基金面上项目(61271159)
云南省应用基础研究项目(2011FB088)
云南省教育厅重大专项研究项目(ZD2014014)
关键词
光伏电池
温度特性
开路电压
填充因子
短路电流
输出转换效率
photovoltaic cells
temperature characteristics
open circuit voltage
fill factor
short circuit current
out-put efficiency
