城市轨道交通杂散电流治理的综述与评估

doi:10.19595/j.cnki.1000-6753.tces.210923

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Abstract Stray current causes inevitable corrosion to structures near electric transportation systems, especially in DC urban rail transit. The paper considers the issue of stray current mitigation discussing what can be done for design and existing systems, sticking to applicable standards and consolidated protection practice. Mitigation measures may be devised for a new constructed system, such as the optimization of traction substation positions, reducing the longitudinal resistance of the running rails and return circuit, and using an additional stray current collection system (to be included in the track bed during construction). As for an existing system, besides increasing the total cross section of the aforementioned return circuit and stray current collection system by adding parallel conductors or cross-bonds, it is recommended to employ static converter units (e.g. negative resistance converters) to control the stray current in the return circuit. These units can be deployed in specific points where analysis or measurement indicates the large rail potential or incipient corrosion is spotted out.

Key words： Urban rail transit stray current corrosion stray current collection stray current mitigation negative resistance converter

Received: 30 June 2021

PACS:

TM922

Fund:Key Program of National Natural Science Foundation of China (51737001).

Corresponding Authors: Xiaofeng Yang male, born in 1980, IEEE Senior Member, PhD, Major research interests include safety power supply in rail transit, high power energy conversion, wide band gap devices application.E-mail: xfyang@bjtu.edu.cn;Andrea Mariscotti male born in 1968, IEEE Senior Member, PhD, Major research interests include electrical safety, stray current, electromagnetic compatibility and human exposure in electrified transports, measurement science and design of instrumentation.E-mail: andrea.mariscotti@unige.it

About author:: Sahil Bhagat male, born in 1991, Senior EMC Engineer at Hitachi Rail, Major research interests include grounding system design, DC stray currents, electromagnetic compatibility, and power system protection.E-mail: Sahil.Bhagat@hitachirail.com

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Cite this article:

Sahil Bhagat,Xiaofeng Yang,Miao Wang等. Review and Evaluation of Stray Current Mitigation for Urban Rail Transit[J]. Transactions of China Electrotechnical Society, 2021, 36(23): 4851-4863.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210923 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I23/4851

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