A generator stator ground fault location method based on flexible optical current transformer

Jian Qiao; Jingrun Guo; Shuhao Peng; Junnan You

doi:10.1117/12.2674007

9 March 2023 A generator stator ground fault location method based on flexible optical current transformer

Jian Qiao, Jingrun Guo, Shuhao Peng, Junnan You

Proceedings Volume 12600, International Conference on Optoelectronic Materials and Devices (ICOMD 2022); 126001P (2023) https://doi.org/10.1117/12.2674007
Event: 2022 International Conference on Optoelectronic Materials and Devices, 2022, Chongqing, China

Abstract

For the large generators with different branch winding potential overlap, the existing stator ground fault location methods are difficult to determine the faulty branch. Therefore, this paper presents a novel fault location method based on the flexible optical current transformer. Based on the Faraday magneto-optical effect principle, the optical fiber reflection reciprocal interference technology is used to detect the rotation angle. The flexible optical current transformer is used to measure the equivalent zero-sequence current of each generator branch, and then the dynamic time warping distance (DTW) algorithm is used to compare the similarity of each zero-sequence current, to identify the correct faulty branch and achieve accurate grounding fault location. The simulation results verify the effectiveness of the proposed method, and the results are still reliable and sensitive when the transition resistance is 500 Ω.

Citation Download Citation

Jian Qiao, Jingrun Guo, Shuhao Peng, and Junnan You "A generator stator ground fault location method based on flexible optical current transformer", Proc. SPIE 12600, International Conference on Optoelectronic Materials and Devices (ICOMD 2022), 126001P (9 March 2023); https://doi.org/10.1117/12.2674007

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