| 引用本文: | 孙波,孙同景,薛永端,徐丙垠,韩金鲁.利用空间电磁场感应检测小电流接地故障[J].电力自动化设备,2009,(7): |
| .Earthing fault detection based on electromagnetic field in non-solidly earthed network[J].Electric Power Automation Equipment,2009,(7): |
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| 摘要: |
| 针对架空线路小电流接地故障信号不易获取的问题,提出一种利用电磁场感应实现非接触式故障检测的新方法.对三相架空线路周围故障前后的电场和磁场特征进行了深入研究,发现线路下方水平磁场与零模电流基本成比例关系,垂直电场与零模电压基本成比例关系.利用电磁场传感器感应水平磁场和垂直电场可以获取零模电流和零模电压信号,利用获取的故障信号,提取故障特征,可以实现小电流接地故障选线与定位.提出了现场应用方案和需要解决的若干关键问题,最后通过仿真验证了该方法的正确性. |
| 关键词: 小电流接地系统 单相接地故障 电场 磁场 故障信号获取 故障检测 |
| DOI： |
| 分类号:TM862 |
| 基金项目:山东省自然科学基金资助项目? |
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| Earthing fault detection based on electromagnetic field in non-solidly earthed network |
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SUN Bo1 SUN Tongjing1 XUE Yongduan2 XU Bingyin2 HAN Jinlu1
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| Abstract: |
| As the fault signals of overhead lines in non-solidly earthed network are difficult to acquire,a method to detect the non-contact fault based on electromagnetic field induction is proposed.The characteristics of electric and magnetic fields beneath the three-phase lines are analyzed,which shows that the vertical electric field is basically proportional to the zero-module voltage and the horizontal magnetic field is basically proportional to zero-module current.The zero-module voltage and zero-module current... |
| Key words: non-solidly earthed network single-phase earthing fault electric field magnetic field faultsignals acquisition fault detection |
