Fault locating in ungrounded and high-resistance grounded systems
Fault locating in ungrounded and high-resistance grounded systems
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DOI：
10.1109/icps.2001.966527
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发表时间：
2001-05
期刊：
影响因子：
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通讯作者：
T. Baldwin;F. Renovic;L. Saunders;D. Lubkeman
中科院分区：
文献类型：
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作者：
T. Baldwin;F. Renovic;L. Saunders;D. Lubkeman
工业电力系统中最常见也是最难解决的问题之一就是接地故障的定位和排除。发生在不接地和高阻接地系统中的接地故障不会吸收足够的电流来触发断路器或熔断器操作，因此很难定位。目前用于跟踪故障的技术既耗时又繁琐。提出了一种新的小电流接地系统接地故障定位方法。该系统包括一种新型的接地故障继电器，它与永久安装在电路中的低成本故障指示器一起运行。接地故障继电器采用数字信号处理技术检测故障，识别故障相，测量距离变电站的电气距离。远程故障指示器用于直观地指示故障位置。该系统为接地故障定位提供了一种快速、简便、经济、安全的检测系统。
One of the most common and difficult problems to solve in industrial power systems is the location and elimination of the ground fault. Ground faults that occur in ungrounded and high-resistance grounded systems do not draw enough current to trigger circuit breaker or fuse operation, making them difficult to localize. Techniques currently used to track down faults are time consuming and cumbersome. A new approach developed for ground fault localization on ungrounded and high-resistance grounded low-voltage systems is described. The system consists of a novel ground fault relay that operates in conjunction with low-cost fault indicators permanently mounted in the circuit. The ground fault relay employs digital signal processing techniques to detect the fault, identify the faulted phase, and measure the electrical distance away from the substation. The remote fault indicators are used to visually indicate where the fault is located. The resulting system provides a fast, easy, economical and safe detection system for ground fault localization.