Fault ranging method based on multisynchrosqueezing transform for flexible DC transmission lines

Chengao Yu; Zhanjun Gao; Tao Yang; Zhao Liu

doi:10.1117/12.2640476

19 October 2022 Fault ranging method based on multisynchrosqueezing transform for flexible DC transmission lines

Chengao Yu, Zhanjun Gao, Tao Yang, Zhao Liu

Proceedings Volume 12294, 7th International Symposium on Advances in Electrical, Electronics, and Computer Engineering; 1229410 (2022) https://doi.org/10.1117/12.2640476
Event: 7th International Symposium on Advances in Electrical, Electronics and Computer Engineering (ISAEECE 2022), 2022, Xishuangbanna, China

Abstract

Due to the dispersion effect of the traveling wave, the wave speed has frequency variation characteristics, and the error of the fault ranging method using empirical wave speed is large. To address this problem, this paper proposes a fault ranging method based on Multisynchrosqueezing Transform (MSST) for flexible DC transmission lines, the MSST method is used to perform time-frequency analysis of the fault line mode voltage traveling wave, to obtain the precise time and frequency information of the traveling wave arriving at the measurement points on both sides of the line, and to calculate the distance of the fault point according to the double-end ranging principle by combining the frequency variation characteristic curve of the wave speed. Since MSST squeezes the signal several times, it effectively improves the time-frequency aggregation of the signal, and the time-frequency feature extraction of the traveling wave and the identification of the wave head are more accurate. Finally, the effectiveness of the fault ranging algorithm was verified by the simulation of PSCAD and MATLAB.

Citation Download Citation

Chengao Yu, Zhanjun Gao, Tao Yang, and Zhao Liu "Fault ranging method based on multisynchrosqueezing transform for flexible DC transmission lines", Proc. SPIE 12294, 7th International Symposium on Advances in Electrical, Electronics, and Computer Engineering, 1229410 (19 October 2022); https://doi.org/10.1117/12.2640476

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