Study of End Point Voltage Measurements on Distribution Systems for Avoiding Open or Falling Conductors from Evolving to Ground Faults and Wildfire Ignitions

Jesse Rorabaugh, Arian Ojeda, Andrew Swisher, Brendan Kirkpatrick, Vahe Bolbolian, R. Ramdoss
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Abstract

Detection of open conductor conditions and de-energization of overhead distribution electric systems before a conductor hits the ground would reduce safety hazards from electrical shocks and fire ignitions. This paper presents methods for detecting and isolating the open conductor without the advanced communication system for PMUs and identifies methods to minimize reliability trade-offs that may be realized with such a detection system. The approach focuses on the use of voltage measurements at circuit end-point locations. The combination of sequence and phase voltages are used to detect the open phase condition. Details are provided for circuit measurements and PSCAD simulations used to refine the pickup voltages to help discriminate against conditions where the open phase detection (OPD) should avoid initiating an operation, such as adjacent feeder faults. The logic developed was implemented to existing devices which have been monitoring for open phase conditions for a year. During this time more than ten open phase conditions have been captured.
配电系统防止断路或跌落导线演变为接地故障和野火着火的终点电压测量方法研究
在导体触地前检测导体的开路状况和架空配电系统的断电将减少触电和着火的安全隐患。本文提出了检测和隔离开放导体的方法,没有先进的pmu通信系统,并确定了方法,以最大限度地减少可靠性权衡,可能会实现这样的检测系统。该方法侧重于在电路端点位置使用电压测量。时序电压和相电压组合用于检测断相状态。提供了电路测量和PSCAD模拟的详细信息,用于改进拾取电压,以帮助区分开相检测(OPD)应避免启动操作的情况,例如相邻馈线故障。开发的逻辑已应用于现有设备,这些设备已经监测了一年的开相条件。在此期间,捕获了十多个开相条件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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