分层土壤短距离放线下接地电阻测试方法研究  

Measuring Method of Grounding Resistance under Short Distance Laying-out in Layered Soil

作　　者：申巍 樊镒铖[1] 王森 杜思琪[1] 李志忠 黄申建[1] 王西香 SHEN Wei;FAN Yicheng;WANG Sen;DU Siqi;LI Zhizhong;HUANG Shenjian;WANG Xixiang(School of Electronic Information,Xi’an Polytechnic University,Xi’an 710048,China;State Grid Shaanxi Electric Power Research Institute,Xi’an 710100,China;Shaanxi Pilot Power Technology Co.,Ltd.,Xi’an 710100,China)

机构地区：[1]西安工程大学电子信息学院,陕西西安710048 [2]国网陕西电力科学研究院,陕西西安710100 [3]陕西中试电力科技有限公司,陕西西安710100

出　　处：《智慧电力》2022年第12期13-18,93,共7页Smart Power

基　　金：国家自然科学基金资助项目(52007138);国家电网公司科技项目(5500-202132115A-0-0-00)。

摘　　要：当土壤不均匀,如土壤为双层甚至三层时,采用传统补偿法测量接地电阻往往会带来较大测量误差。研究提出了短距离放线方式下接地电阻测试方法。分析了工频接地电阻与电流注入点的位置关系,研究了不同电流注入点对接地电阻测量偏差的影响规律,验证了短电流极引线法在工频接地阻抗测试中的可行性。针对不同的土壤结构,研究了电流引线布线长度对电压补偿点位置的影响。提出不同土壤结构下电流引线长度的选取规律,实现了短电流引线下接地阻抗的准确测量。When the soil is not uniform,such as two-layer or even three-layer soil,the traditional compensation method can causes a large error in grounding resistance measurement.Therefore,this paper proposes a measuring method of the grounding resistance under short distance laying-out mode,analyzes the position relationship between the power frequency grounding resistance and the current injection point,investigates the influence law of different current injection points on the grounding resistance measurement deviation,and verifies the feasibility of short current electrode lead method in the power frequency grounding impedance measurement.Moreover,according to different soil structures,the influence of current lead length on voltage compensation point location is analyzed,and the selection law of the current lead length in different soil structures are put forward,realizing the accurate measurement of the grounding impedance with short current lead.

关 键 词：接地电阻 短距测量 补偿法 不同土壤 选取规律 

分 类 号：TM862[电气工程—高电压与绝缘技术]