大型地网接地阻抗测量误差影响因素分析  

Analysis of Influence Factors of Grounding Impedance of Large Ground Network

作　　者：刘义隅 周仿荣 马御棠 

机构地区：[1]云南电网有限责任公司楚雄供电局,云南楚雄675000 [2]云南电网有限责任公司电力科学研究院,昆明650217

出　　处：《云南电力技术》2016年第2期23-26,共4页Yunnan Electric Power

摘　　要：本文以实验数据为基础提出并分析了测量大型地网接地阻抗的影响因素:工频干扰、测量引线间互感、电压极的布置、接地网附近金属管道、电流回路电阻大小、电流极选择、地线和地中金属管道分流等,同时对这些影响因素提出解决措施,以尽可能减小测量结果与接地网接地阻抗真实值之间的误差。In this article, we present and analyze the factors inlfuence the measurement of grounding impedance： power interference, mutual inductance between measuring leads, arrangementof voltage electrodes, metal pipelinesnear the grounding grid, the size of the current loop resistance, selection of the current electrodes and metal pipeline diversion. And we also discuss the solutions of these inlfuence factors to minimize the error between the measurement results and the true value of grounding impedance.

关 键 词：接地阻抗 地电位升 入地电流 干扰因素 

分 类 号：TM934.7[电气工程—电力电子与电力传动]