Model Free Traveling Wave Based Fault Location Method for Series Compensated Transmission Line

Abstract

Locating fault position in a series compensated transmission line is a difficult task due to the non-linear characteristics of the metal-oxide varistor which is present in the protection system of the compensator. In this paper, a model-free two-terminal traveling wave-based fault location method for a series compensated line is proposed. The technique makes use of two subroutines which calculate the fault locations assuming that the fault position to be on the left and right side of the series compensator respectively. The method then selects the correct fault location of the two by a special logic based on faulted half-section identification. The first two traveling wave arrival times recorded at both the terminals of the line are used in the method. The proposed technique does not require model information of the series capacitor and transmission line. It has been verified using the PSCAD/EMTDC model of a 400-kV, 300 km transmission line which is compensated by a fixed series capacitor in the middle and line ends. The performance of the proposed method is compared with a commercially available classical two-ended techniques and setting-free method. INDEX TERMS Faulted half-section identification, series compensated lines, synchronized data, travelingwave-based fault locator This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.

A novel traveling wave arrival time detection method in power system

“…Parameter λ can be selected to minimize the norm of the elements of two consecutive W[n] and λW[n−1] vectors through (15):…”

“…where x i and y i are i-th elements of the vectors W[n] and λW[n−1] respectively for i = 1,2, …, N−3. By minimizing Equation (15), the λ parameter is obtained as follows:…”

“…To eliminate the time-quantization error caused by the limited sampling rate and to improve the AT-detection, the parabolic fitting has been used on the samples around the maximum amount of wavefront. Using this technique, Naidu et al introduced algorithms for locating faults using single-terminal or double-terminal measurements [14][15][16].…”

“…Using this technique, Naidu et al. introduced algorithms for locating faults using single‐terminal or double‐terminal measurements [14–16].…”

A new traveling‐wave detection method for fault location based on two sequential sliding windows and curve fitting

“…One of the methods proposed for AT-detection called the differentiator-smoother algorithm is presented in [9][10][11]. In [12][13][14], this algorithm is applied to conduct the singleended traveling wave-based fault location (SETWFL) and the double-ended traveling wave-based fault location (DETWFL) in transmission lines.…”