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Fault location scheme for combined overhead line with underground power cable

机译:地下电缆组合架空线故障定位方案

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摘要

This paper presents a fault location scheme for transmission systems consisting of an overhead line combined with an underground power cable. The algorithm requires phasor measurements data from one end of the transmission line and the synchronized measurements at the most far end of the power cable. Fault location is derived using distributed line model, modal transformation theory and Discrete Fourier Transform. The technique can be used on-line or off-line using the data stored in the digital fault recording apparatuses. The proposed scheme has the ability to locate the fault whether it is in the overhead line or in the underground power cable. In addition to, the proposed scheme gives an accurate estimation of the fault resistance at fault location. Extensive simulation studies carried out using MATLAB show that the proposed scheme provides a high accuracy in fault location under various fault conditions.
机译:本文提出了一种输电系统的故障定位方案,该方案由架空线和地下电缆组成。该算法需要来自传输线一端的相量测量数据以及在电源线最远端的同步测量。使用分布式线路模型,模态变换理论和离散傅里叶变换推导故障位置。可以使用存储在数字故障记录设备中的数据在线或离线使用该技术。所提出的方案能够定位故障,无论是在架空线还是在地下电缆中。另外,提出的方案给出了故障位置处的故障电阻的准确估计。使用MATLAB进行的广泛仿真研究表明,该方案在各种故障条件下都能提供较高的故障定位精度。

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