残余电荷对绝缘电阻测试的影响  

The Influence of Residual Charge on Insulation Resistance Test

作　　者：和晓辉 张翔 周杲 余云光 彭兆裕 周仿荣 谭向宇 He Xiaohui;Zhang Xiang;Zhou Gao;Yu Yunguang;Peng Zhaoyu;Zhou Fangrong;Tan Xiangyu(Electric Power Research Institute of Yunnan Power Grid Corporation,Kunming 650127,Yunnan,China;Center for training and evaluation of Yunnan Power Grid Corporation,Kunming 650127,Yunnan,China;Honghe Power Supply Bureau of Yunnan Power Grid Corporation,Honghe 661400,Yunnan,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,云南昆明650127 [2]云南电网有限责任公司培训与评价中心,云南昆明650127 [3]云南电网有限责任公司红河供电局,云南红河661400

出　　处：《云南电力技术》2024年第4期78-82,共5页Yunnan Electric Power

摘　　要：大容量设备的残余电荷对其绝缘电阻测试结果具有显著的影响,严重时会导致误判。本文通过仿真计算、理论分析、试验分析相结合的方式,阐明了残余电荷对绝缘电阻测试的影响机理。残余电荷极性与试验电源极性相同时,吸收电流值偏小,绝缘电阻值偏大;当残余电压极性与试验电源极性相反时,吸收电流值偏大,绝缘电阻值偏小。残余电荷量越多,影响越显著。本文研究有助于加深一线电力工作者对残余电荷的认识并指导绝缘电阻测试工作。The residual charge of large capacity equipment has a significant impact on the insulation resistance test results, which lead to misjudgment. In this paper, the influence mechanism of residual charge on insulation resistance measurement is illustrated by means of simulation calculation,theoretical analysis and experimental analysis.When the polarity of the residual charge is the same as that of the test power supply,the absorbed current value is smaller and the insulation resistance value is larger.When the polarity of the residual voltage is opposite to that of the test power supply,the absorbed current value is larger and the insulation resistance value is smaller. The greater the amount of residual charge, the more significant the effect. The research in this paper is helpful to deepen the understanding of the electrical workers to the residual charge and guide the insulation resistance measurement.

关 键 词：大容量电力设备 残余电荷 极性 电路仿真 电路定理 

分 类 号：TM74[电气工程—电力系统及自动化]