Title: A method of grounding fault location in power system based on adaptive filtering

Authors: Ping Zhang; Dajun Tang; Hui Yang; Yi Zeng

Addresses: Hunan Wuling Power Technology Co. Ltd., Yuhua District, Changsha, 410000, China ' Hunan Wuling Power Technology Co. Ltd., Yuhua District, Changsha, 410000, China ' Hunan Wuling Power Technology Co. Ltd., Yuhua District, Changsha, 410000, China ' Hunan Wuling Power Technology Co. Ltd., Yuhua District, Changsha, 410000, China

Abstract: To reduce the error rate of fault localisation and improve the accuracy and efficiency of power system grounding fault localisation, a power system grounding fault localisation method based on adaptive filtering is proposed. Analyse the parameter states of direct distribution lines and single phase line grounding to determine the type of grounding fault in the power system. Determine the location of the fault point based on the differences between different line ends in the power system; using adaptive Kalman state to determine the actual location of the fault point. Using the fault points in travelling wave ranging as harmonic components, establish a state space model, and use adaptive filters to achieve transient fault localisation. The test results show that this method can reduce the positioning error of grounding fault points, with an error always below 1.5%, and the required time is shorter, with a maximum time of 0.23 seconds.

Keywords: adaptive filtering; power system; ground fault point; location; travelling wave ranging; parameter estimation.

DOI: 10.1504/IJPEC.2023.134876

International Journal of Power and Energy Conversion, 2023 Vol.14 No.2/3, pp.210 - 225

Received: 02 Mar 2023
Accepted: 31 May 2023
Published online: 15 Nov 2023 *

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