| 应用地表电位诊断接地网故障的试验研究 |
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| 引用本文： | 苏磊,王丰华,王劭菁,刘亚东.应用地表电位诊断接地网故障的试验研究[J].电气自动化,2016(3). |
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| 作者姓名： | 苏磊 王丰华 王劭菁 刘亚东 |
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| 作者单位： | 1. 上海电力公司电力科学研究院,上海,200437;2. 上海交通大学 电气工程系,上海,200240 |
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| 基金项目： | 国家自然科学基金(51307109) |
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| 摘 要： | 为有效提高变电站接地网导体故障诊断的准确性,分别以规则形状和不规则形状两种接地网模型为研究对象,通过模拟典型故障,对接地网典型故障下的地表电位分布进行了测试分析。测试结果表明,通过分析接地网的地表电位分布可较为准确地实现变电站接地网导体的故障点位置及故障类型的确定。当接地网存在虚焊、脱焊或腐蚀故障时,故障位置及其相邻导体段的地面电位会呈现不同程度的上升或下降。研究结果可为基于地表电位分布的接地网故障诊断方法提供重要补充。
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| 关 键 词： | 变电站 地表电位 故障诊断 接地网 模拟试验 |
A Test Study on Fault Diagnosis of the Grounding Grid Based on Surface Potential |
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| Abstract: | To improve the accuracy of fault diagnosis of the transformer substation grounding grid,this paper studies regular and irregular shapes of grounding grid models,and makes a test analysis on the surface potential distribution in the case of simulated typical fault of the grounding grid.The test results show that,by analyzing the surface potential distribution of the grounding grid,we can quite accurately determine the location and type of faults in the grounding grid conductor of the transformer substation.In the case of grounding grid faults of pseudo soldering,sealing off or corrosion,the fault location and the surface potential of adjacent conductor sections may rise or drop accordingly.The research results constitute an important supplement to the method of fault diagnosis of the grounding grid based on surface potential distribution. |
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| Keywords: | transformer substation surface potential fault diagnosis grounding grid simulation test |
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