Abstract
The rapid development of railway electrification has led to signaling relay malfunctions and locomotive urgent braking accidents caused by unbalanced traction harmonic current (UTHC), which seriously threaten transit safety. This paper presents a comprehensive study with a mechanism-modeling-solution approach that addresses the practical issue of UTHC interference in signaling systems and provides theoretical support for further research, relying on an actual case. Based on the mechanism analysis of UTHC interfering with the on-board and ground signaling terminals, UTHC and its induced harmonic electromotive force on both terminals are accurately modeled. The proposal and evaluation of solutions are supported by mathematical analysis of the relationship between traction-side current and signaling-side induced electromotive force. A low active loss passive filter with high filtering effect was designed and connected to the traction network for the actual case, effectively addressing the high-frequency harmonic resonance risk in traction power supply systems and the harmonic interference issue in signaling systems. Field tests validate the feasibility and effectiveness of this solution. Accounting for cost constraints, guidelines for reducing current unbalance between two rails or avoiding choke transformer core saturation are developed based on a comprehensive sensitivity analysis of traction current unbalance coefficient and signaling equipment parameters.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Transportation Electrification
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
