Locating Current Leakage Point of Subway and HVDC with Multi Components Geoelectrical Potential Monitoring

Zhang, Xin1,2; Han, Peng3; Yang, Xiaodong1; Huang, Yuanmin2; Wu, Xiaoping1

2024

10.1007/s00024-023-03388-7

PURE AND APPLIED GEOPHYSICS   影响因子和分区

0033-4553

1420-9136

Significant disturbances of stray currents caused by subway leakage and unbalanced high-voltage direct current (HVDC) have a significant impact on grounded motors. To obtain the subway leakage current and HVDC ground current, two types of multi-pole distance devices with 6/8 electrodes for orthogonal combination are used. The template matching method is applied to identify the spontaneous potential (SP) pulses generated by subway train start/stop, and daily variation correction is utilized to determine geoelectric field (GEF) step changes caused by HVDC. The results show that (1) the number of SP pulses picked up after template matching corresponds to the number of running trains and the combination of pulses from multiple component orientations reflects the orientation of leakage point; (2) the method for locating current leakage sources can identify the positions of two HVDC converter stations after daily variation correction by analyzing the GEF observation from numerous stations; (3) there are slight dissimilarities between the HVDC simulation and GEF observation due to local electromagnetic environment and electrical structure factors. Therefore, accurate signals of orthogonal observation and positioning methods are crucial for confirming the interference source; after correction in the normal signals, results of good electromagnetic observation can be obtained.

High-voltage direct current (HVDC) stray current source locating geoelectrical potential spontaneous potential (SP)

SCI

英语

其他

National Key R&D Program of China["2018YFE0208300","2022YFF0800702"] ; Guangdong Basic and Applied Basic Research Foundation[2022A1515011105] ; National Natural Science Foundation of China[U2039206] ; Fundamental Research Funds for the Central Universities, University of Science and Technology of China[WK2080000173]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:001127290000001

SPRINGER BASEL AG

GEOSCIENCES

Web of Science

1.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China
2.Guangdong Earthquake Agcy, CEA Key Lab Earthquake Monitoring & Disaster Mitig, Guangzhou, Peoples R China
3.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Peoples R China

Zhang, Xin,Han, Peng,Yang, Xiaodong,et al. Locating Current Leakage Point of Subway and HVDC with Multi Components Geoelectrical Potential Monitoring[J]. PURE AND APPLIED GEOPHYSICS,2024,181(1).

Zhang, Xin,Han, Peng,Yang, Xiaodong,Huang, Yuanmin,&Wu, Xiaoping.(2024).Locating Current Leakage Point of Subway and HVDC with Multi Components Geoelectrical Potential Monitoring.PURE AND APPLIED GEOPHYSICS,181(1).

Zhang, Xin,et al."Locating Current Leakage Point of Subway and HVDC with Multi Components Geoelectrical Potential Monitoring".PURE AND APPLIED GEOPHYSICS 181.1(2024).