河西走廊高土壤电阻率地区电网接地电阻测量与分析 .pdfVIP

学兔兔 第51卷 第18期 电测与仪表 VOI．51 NO．18 2Ol4年 9月25日 Electrical neasurement Instrumentation Sep．25,2014 ：l： 河西走廊高土壤电阻率地区电网接地电阻测量与分析 胡春江，吴玉硕，杨志华，温定筠，张凯 (国网甘肃省电力公司电力科学研究院，兰州730050) 摘要：河西走廊地区以地表多岩石戈壁地貌为主要特征，土壤电阻率高，此类地区变电站接地系统的处理及测 量存在许多技术困难。在该地区测量地网接地电阻时会遇到注入测量电流困难、测试设备试验容量难以满足测 量需求、各种干扰因素复杂、难以测得可信结果等问题。以河西走廊地区某变电站接地网测试为例，选择合理的 理论测量模型并对测量模型及结果进行了分析，为设备的安全运行提供基础数据，也为今后该类地区地网测试 提供了参考。 关键词：河西走廊；接地系统；接地电阻；变电站 ‘ 中图分类号：TM93 文献标识码：B 文章编号：1001—1390(2014)18—0121—03 The Power Frequency Grounding Resistance Measurement and Analysis of Groun ding-Net in High Resistively Soil Area of Hexi Corridor Regions HU Chun-jiang，WU Yu-shuo，YANG Zhi-hua，WEN Ding-jun，ZHANG Kai (Electric Power Research Institute，State Grid Gansu Electric Power Research Corperation，Lanzhou 730050，China) Abstract：The surface topography in the Hexi Corridor region is mainly characterized by rock gobi．Because of high resistivity，many technical difficulties exist in tackling and measuring the grounding nets of the transformer substation in this region．When measuring the grounding resistance in the region，there are such difficulties as the difficulty in injecting measuring current，insufficient testing capacity of the test equipment，various complex interference factors and the difficulty in getting credible results by measuring．This paper adopted a reasonable theory-testing model and analyzed the test model and results by choosing a substation ground grid in the Hexi Corridor region as an example．This work will provide the basic data for the safe operation of the equipment．and it