基于灾后定损评估的台风灾害对光伏组件输出功率影响的分析

ANALYSIS OF IMPACT OF TYPHOON DISASTER ON THE OUTPUT POWER OF PV MODULES BASED ON POST-DISASTER DAMAGE ASSESSMENT

本文以一座建设于沿海地区并遭受了台风灾害的地面光伏电站为例,利用电致发光(EL)检测和Ⅰ-Ⅴ特性测量等方式,考察了在遭受台风灾害后该光伏电站中光伏组件的输出功率变化情况;并且为了满足灾后定损评估的需求,本文采用t检验方法对测试数据及结果进行了更深入地统计和分析,以评价不同受灾程度光伏组件的输出功率衰减程度。结果表明:因台风造成的光伏组件隐裂可能不会立即导致光伏组件输出功率的衰减,而海水浸泡则会在短时间内加速光伏组件的老化。由此可知,对遭受类似灾害侵袭的光伏电站进行灾后定损评估时,应更加关注光伏组件的浸水问题,尤其是由成分复杂的洪水浸泡导致的光伏组件输出功率衰减问题。

In this paper,a ground PV power station built in the coastal area and hit by typhoon is taken as the analysis object. By means of electroluminescence(EL) test and Ⅰ-Ⅴ characteristic measurement,the variation of output power of PV modules in the PV power station after typhoon disaster is investigated. In order to meet the requirements of post-disaster damage assessment,this paper adopts t-test method to statistics and analysis more in-depth on the test data,so as to evaluate the degradation degree of the output power of PV modules with different disaster degrees. The results show that the cracks caused by typhoon may not lead to the output power degradation of PV modules immediately. However,the aging of PV modules is accelerated although the PV modules were immersed in seawater for a short time. It’s illustrated that when performing post-disaster damage assessment for PV power station that has suffered from similar disasters,more attention should be paid to the water immersion problem of PV modules,especially the output power degradation of PV module caused by flooding with complex components.