积灰与局部阴影对光伏阵列功率衰减的影响  

Effect of dust accumulation and partial shadow on the PV arrays power attenuation

作　　者：谢毅[1] 高林朝[1] 贾兵[1] 郝庆英[1] 贺立三[1] 胡国华[1] XIE Yi;GAO Linchao;JIA Bing;HAO Qingying;HE Lisan;HU Guohua(Energy Research Institute of Henan Academy of Sciences, Zhengzhou 450008, China)

机构地区：[1]河南省科学院能源研究所有限公司,河南郑州450008

出　　处：《河南农业大学学报》2021年第3期448-452,459,共6页Journal of Henan Agricultural University

基　　金：河南省重点科技攻关项目(182102210075);河南省科学院科研开发专项(200606086,200606105)。

摘　　要：以河南省舞阳县光伏扶贫电站项目为对象,选取4个电站现场测试了光伏组件在无积灰无遮挡、无积灰有遮挡、有积灰无遮挡和有积灰有遮挡4种工况条件下的组件功率衰减,依据测试数据对比分析了光伏电池板表面积灰、阵列局部阴影对功率衰减率和发电量的影响程度。结果表明,电站组件在无积灰无遮挡、无积灰有遮挡、有积灰无遮挡和有积灰有遮挡4种工况条件下的平均衰减率分别为1.8%、10.5%、4.0%和10.8%。局部遮挡阴影造成的组件功率衰减率最大,对发电量影响也最大,积灰对功率衰减也有一定影响,但相对不明显。This paper takes a PV poverty alleviation power station project in Wuyang county of Henan province as the study object.Four power stations under different working conditions were selected to test the array power attenuation on site.According to the test data,the influencing factors of photovoltaic system power attenuation caused by surface dust accumulation of photovoltaic panels and local shadows of the array were compared and analyzed.The results show that the average attenuation rates of power station components under four working conditions of no dust and no shade,no dust and shade,dust and no shade,and dust and shade are 1.8%,10.5%,4.0%and 10.8%,respectively.The power attenuation rate of components caused by local shadows is the highest,and the influence on power generation capacity is the greatest.And dust accumulation had certain effect on the power attenuation,but the effect is relatively not obvious.If there are any obstructions,the surrounding trees and other shelters that affect the power station should be dealt with in time.

关 键 词：光伏发电系统 功率衰减 积灰 阴影 光伏阵列 发电量 

分 类 号：TM615[电气工程—电力系统及自动化]