光伏阵列在线绝缘监测系统的研究  

Study of the online photovoltaic array insulation monitoring system

作　　者：成林俞 戴瑜兴[1] 刘红 曾国强[1] 

机构地区：[1]温州大学物理与电子信息工程学院,浙江温州325035 [2]浙江埃菲生能源科技有限公司,浙江温州325032

出　　处：《电测与仪表》2015年第1期81-85,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51207112)

摘　　要：光伏阵列对地绝缘阻抗不合格将对设备和人身带来重大安全事故,光伏电站需自动监测光伏阵列的对地绝缘阻抗。为此,提出了一种基于不平衡电桥法的新型绝缘监测方案,并进行了理论推导和误差分析。实际运行表明,该方案能准确检测光伏阵列直流母线和支路对地绝缘阻抗值的大小,提高了光伏电站运行的安全性和稳定性。The unqualified insulation resistance of photovoltaic arrays will bring about significant accidents to the e- quipment and personal safety, so it is necessary for photovoltaic power stations to automatically monitor insulation re- sistance of photovohaic arrays. Therefore, this paper proposed a new insulation monitoring scheme based on the unbal- anced electric bridge, and carried out theoretical derivation and error analyses. Practical operation showed the scheme could accurately detect the size of the insulation resistance value of the DC bus and branches of photovoltaic arrays, and improve the security and stability of the photovoltaic power station operation.

关 键 词：光伏阵列 光伏电站 不平衡电桥法 绝缘监测 

分 类 号：TM934[电气工程—电力电子与电力传动]