Wave-Speed-Independent Traveling Wave Fault Location Method for Flexible DC Transmission Lines

Huina Hong, Zhiwei Cheng, Hongyi Yang, Kaixin Zhang (), Shenxing Shi, Wenjing Zhang, Zhiwei Zhuo and Weifeng Dong
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Huina Hong: Ultra High Voltage Branch, State Grid Fujian Electric Power Co., Ltd., Fuzhou 350013, China
Zhiwei Cheng: Ultra High Voltage Branch, State Grid Fujian Electric Power Co., Ltd., Fuzhou 350013, China
Hongyi Yang: Ultra High Voltage Branch, State Grid Fujian Electric Power Co., Ltd., Fuzhou 350013, China
Kaixin Zhang: Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Shenxing Shi: Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Wenjing Zhang: Ultra High Voltage Branch, State Grid Fujian Electric Power Co., Ltd., Fuzhou 350013, China
Zhiwei Zhuo: Ultra High Voltage Branch, State Grid Fujian Electric Power Co., Ltd., Fuzhou 350013, China
Weifeng Dong: Ultra High Voltage Branch, State Grid Fujian Electric Power Co., Ltd., Fuzhou 350013, China

Energies, 2025, vol. 18, issue 22, 1-14

Abstract: Accurate fault location in flexible DC transmission lines is essential for ensuring rapid fault clearance and system reliability. However, traditional traveling-wave methods are often affected by wave velocity variations and synchronization errors. To address these issues, this paper proposes an improved double-ended traveling-wave fault location method specifically designed for flexible DC transmission systems. The method utilizes the inherent smoothing reactors of DC lines to simplify the identification of reflected waves and introduces a location algorithm that is independent of wave velocity and synchronous timing accuracy. By integrating the advantages of both single-ended and double-ended approaches, the proposed method significantly enhances location accuracy. Simulation results and comparisons with conventional double-ended methods verify its superiority and robustness.

Keywords: flexible DC transmission; traveling wave fault location; wave speed (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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