温度和辐照对半片与叠瓦光伏组件性能的影响  

Effects of ambient temperature and irradiance on performance of half-cut and shingled photovoltaic modules

作　　者：武朝磊 刘志民 韦德远 陈静伟[1] 许颖 WU Chao-lei;LIU Zhi-min;WEI De-yuan;CHEN Jing-wei;XU Ying(College of Physics Science and Technology,Hebei University,Baoding 071000,China;Institute of Photovoltaic Inspection and Certification,China Building Material Test&Certification Group Co.,Ltd.,Beijing 100024,China;College of Science,Zhejiang University of Technology,Hangzhou 310023,China)

机构地区：[1]河北大学物理科学与技术学院,河北保定071000 [2]中国建材检验认证集团股份有限公司光伏检验认证院,北京100024 [3]浙江工业大学理学院,浙江杭州310023

出　　处：《光学精密工程》2021年第8期1782-1794,共13页Optics and Precision Engineering

基　　金：河北省重点研发计划资助项目(No.20314305D);国家重点研发计划资助项目(No.2018YFB1500504,No.2018YFB1500904-05);国家自然科学基金青年基金资助项目(No.61704045)。

摘　　要：针对新型光伏组件技术半片组件和叠瓦组件比较系统地研究了辐照和温度对组件电学性能稳定性的影响。按照IEC61215和IEC61853标准,在室内的虚拟环境和光伏电站里的实际环境中测试了温度和辐照对常规、半片和叠瓦组件电学性能稳定性的影响。在AM1.5标准辐照条件下,叠瓦和半片组件主要电学参数的相对温度系数绝对值均比常规组件有大幅度的降低,展现出更高的热稳定性,且热稳定性与辐照度正相关。在0~80°辐照入射角内两种组件的光利用率都大于常规组件,展现出更高的辐照角度稳定性。经户外环境的累计辐照后,半片和叠瓦组件的光致衰减效应比常规组件较弱,具有更高的长期辐照稳定性。半片和叠瓦组件的性能在温度、光入射角度和长期辐照方面的稳定性均比常规组件有所提高,这一结果主要归因于小面积电池导致的更强的热机械应力抵抗能力、电路产生更小的焦耳热以及内部部分电池并联而减弱的热斑效应。Aiming at new photovoltaic(PV)module technologies,half-cell modules and shingled modules,we systematically analyzed the influence of irradiance and temperature on the electrical stability of PV modules. In accordance with the IEC61215 and IEC61823 standards,we tested the effects of temperature and radiance on the electrical stability of conventional,half-cell,and shingled modules in a simulated indoor environment and a real outdoor environment at a photovoltaic power station. The absolute values of the relative temperature coefficients of the main electrical parameters of shingled and half-cell modules are significantly lower than those of conventional modules under the AM1. 5 irradiance condition. This indicates that shingled and half-cell modules have higher thermal stability. Moreover,thermal stability is positively correlated with irradiance. The light utilization efficiency of these two types of modules is greater than that of conventional modules in the incidence angle range of 0–80°;this shows that such modules are less affected by the incidence angle. After accumulative irradiance in an outdoor environment,the light-induced degradation of half-cell and shingled modules is weaker than that of conventional modules;thus,half-cell and shingled modules possess higher stability against long-term irradiance. Half-cell and shingled modules exhibit greater performance stability than conventional modules do in terms of heat,incidence angle,and long-term irradiance. This is mainly due to their stronger thermomechanical stress resistance,which is caused by the small cell area,the smaller Joule heat generated by the circuit,and the weakened hot-spot effect due to the parallel connection of some solar cells inside PV modules.

关 键 词：光伏组件 温度系数 辐照度 光利用率 光致衰减 

分 类 号：TB472[一般工业技术—工业设计]