Interference mechanism analysis and mitigation measures with railway signalling equipment from harmonics in the traction system. Issue 4 (22nd September 2020)

• Record Type: Journal Article
• Authors: Li, Zhiyu; Liu, Shanghe
• Is Part Of: Transportation safety and environment. Volume 2:Issue 4(2020)
• Page Start: 271
• Page End: 282
• Publication Date: 2020-09-22
• Subjects: heavy-haul railway -- traction harmonics -- interference -- signalling equipment; Transportation engineering -- Periodicals; Transportation -- Safety measures -- Periodicals; 629.04
• DOI: 10.1093/tse/tdaa023
• Languages: English
• ISSNs: 2631-4428

Abstract

Abstract: With the development of high-speed railway and heavy-haul rail transport in China, a large number of new types of electric locomotives and electric multiple units have been put into operation, improving the efficiency and equipment quality of railway transportation. However, harmonics emitted from the traction system and locomotives often interfere with the railway signalling equipment, which can lead to critical malfunction of the equipment. Based on field test data, this paper analyses the interference coupling mechanism and magnitude of traction harmonics to the signalling equipment using a three-element method of interference. It examines the three essential elements of electromagnetic interference, studies harmonic mitigation measures and proposes to solve the problem of inteference with signalling equipment by installing a passive high-pass filter in the coupling path. After comparing the effects of several types of filters using simulation tests, this paper verified the validity of the method and concluded that a second-order passive filter is the optimal solution for harmonic interference mitigation.