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首页> 外文期刊>Electric power systems research >Fault location of transmission lines connecting with short branches based on polarity and arrival time of asynchronously recorded traveling waves
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Fault location of transmission lines connecting with short branches based on polarity and arrival time of asynchronously recorded traveling waves

机译：基于异步记录的行波的极性和到达时间的短支路传输线的故障位置

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摘要

Due to complex reflection and refraction at line terminals, traditional single-end traveling wave (TW) fault location (FL) cannot be directly applied to transmission lines connecting with short branches. This paper presents an improved single-end TW FL method for this special case. Three TW recorders are required to be mounted at local, middle and remote terminals of the transmission line but accurate synchronous sampling is not required. In the proposed method, combined with the defined polarity coefficients of current TW wave fronts (WFs), the absolute difference of the time differences of arrival (TDOAs) of the modulus TWs at both terminals is firstly utilized to determine whether the fault occurs in the transmission line. If the fault is detected in the transmission line, the fault line section can be then determined by the ratio of the TDOAs of the modulus TWs recorded at both terminals. Finally, the TDOAs of the first two WFs at the three TW recorders are calculated and compared with the theoretical ones to determine the source of the second WF. The corresponding single-end accurate FL formula is selected to pinpoint the fault. A simulation model of a transmission line connecting with short branches is constructed by PSCAD/EMTDC. Various faults are simulated to verify the proposed FL method. The calculation results demonstrate that the method is not affected by FLs, impedances, inception angles, noises and longer lines to a certain extent.
机译：由于线路终端的反射和折射复杂，传统的单端行波（TW）故障定位（FL）无法直接应用于连接短分支的传输线。本文针对这种特殊情况提出了一种改进的单端TW FL方法。需要在传输线的本地，中间和远程终端安装三个TW记录器，但是不需要精确的同步采样。在提出的方法中，结合电流TW波前（WFs）的定义的极性系数，首先利用模量TWs在两个端子处的到达时间差（TDOAs）的绝对差来确定故障是否发生在电网中。传输线。如果在传输线中检测到故障，则可以通过记录在两个端子上的模量TWs的TDOA之比来确定故障线段。最后，计算三个TW记录器的前两个WF的TDOA，并将其与理论值进行比较以确定第二个WF的来源。选择相应的单端精确FL公式以查明故障。利用PSCAD / EMTDC建立了一条短支路连接的传输线仿真模型。仿真各种故障以验证所提出的FL方法。计算结果表明，该方法在一定程度上不受FL，阻抗，起始角度，噪声和较长线路的影响。

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  • 来源
    《Electric power systems research》 |2019年第4期|184-194|共11页
  • 作者

    Nan Peng; Lutian Zhou; Rui Liang; Xu Haoyuan;

  • 作者单位

    China Univ Min & Technol, Sch Elect & Power Engn, Xuzhou 221116, Jiangsu, Peoples R China|Jiangsu Prov Lab Elect & Automat Engn Coal Min, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Elect & Power Engn, Xuzhou 221116, Jiangsu, Peoples R China|Jiangsu Prov Lab Elect & Automat Engn Coal Min, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Elect & Power Engn, Xuzhou 221116, Jiangsu, Peoples R China|Jiangsu Prov Lab Elect & Automat Engn Coal Min, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Elect & Power Engn, Xuzhou 221116, Jiangsu, Peoples R China|Jiangsu Prov Lab Elect & Automat Engn Coal Min, Xuzhou 221116, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Modulus traveling wave; Short branch; Transmission line; Asynchronous measurement; Fault location;

    机译：模行波;短分支;传输线;异步测量;故障定位;

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