Fault Location Method of HVDC Transmission Cable

doi:10.3969/j.issn.1008-0198.2022.06.022

Hunan Electric Power ›› 2022, Vol. 42 ›› Issue (6): 123-128.doi: 10.3969/j.issn.1008-0198.2022.06.022

• Faults and Analysis • Previous Articles

Fault Location Method of HVDC Transmission Cable

CHEN Wen¹, CHEN Kaiping², XIA Xiangyang², XIA Junshan¹, WANG Ruiqi¹, HU Xiaozhong³

1. Goldcup Electric Apparatus Co., Ltd., Changsha 410007, China;
2. Changsha University of Science & Technology,Changsha 410014, China;
3. Energy Management Center of Logistics Support Department, Central South University, Changsha 410200, China

Received:2022-09-21 Revised:2022-10-17 Online:2022-12-25 Published:2023-01-13

Abstract

Abstract: When the single pole fault occurs in the DC side overhead line of system, the voltage proportion of each frequency band of the single pole line presents different situations due to the different fault pole lines. Therefore, a single pole grounding fault location method of MMC-HVDC system based on fuzzy ratio analysis is proposed in this paper. In this method, the voltage of each frequency band during fault is separated through S-transform. Depending on the different proportion of voltage of each frequency band, the fault pole of the system can be quickly located only by one side of the device, and the weight of the proportion of voltage of each frequency band in the overall ranging can be found by neural network training, so as to finally realize the accurate location of fault location. Finally, PSCAD / EMTDC electromagnetic transient simulation software is used to build the two terminal bipolar flexible DC transmission model. The simulation results verify the accuracy of the proposed identification method and ranging algorithm.

Key words: flexible DC transmission, single pole grounding fault location, S-transform, neural network

CLC Number:

TM721.1

CHEN Wen, CHEN Kaiping, XIA Xiangyang, XIA Junshan, WANG Ruiqi, HU Xiaozhong. Fault Location Method of HVDC Transmission Cable[J]. Hunan Electric Power, 2022, 42(6): 123-128.

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Fault Location Method of HVDC Transmission Cable

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