A Network-Based Method to Analyze EMI Events of On-Board Signaling System in Railway

Meng Li,Jinbao Zhang,Dan Zhang,Yinghong Wen,Guodong Wang

doi:10.3390/app10249059

Abstract

The On-board Train Control System (OTCS) plays an important role in the real-time operation of the electric multiple units (EMU) in high-speed railway. The EMU is a complex system made up of various electrical and electronic equipment, so the interactions of the electromagnetic (EM) environment and OTCS are difficult to study, which leads to more challenges to analyze EM interference (EMI) events at the system level. To overcome this difficulty, this paper proposes the thought of a graph model to solve the problem. First, a framework is proposed to more clearly reflect the relationship between the EMC (Electromagnetic Compatibility) problem and network through a comparison with them. Second, a network theory-based model is presented to express the EMC elements for the OTCS in EMU. It decomposes the OTCS and EMU with EMC elements into edges and nodes of the network, which parameters are defined corresponding to EM sources, sensitive equipment, and coupling paths. Thus, each part could be modeled separately or together by calculation, simulation, or measurement, respectively, and the EMC problem could be represented by the paths from origin to destination in the network. Moreover, the modeling process was elucidated by the specific cases in OTCS and the validity of the proposed approach was verified by calculation and measurement results in the case study.

Highlights

The electric multiple units (EMU) are becoming increasingly advanced and intelligent with the new technology applied in the world railway system, such as the new types of CR (Fuxing in ChinaRailway) series in China in the last years
This paper proposes a network-based modeling method for EM interference (EMI) event analysis in On-board Train Control System (OTCS), which decomposes the OTCS and EMU into nodes and edges to abstractly present the elements of EMC and equipment, making EMC analysis in system-level view possible
By combining the EM sources, sensitive equipment, and coupling into different paths in the EN model, each EMI event can be studied from the origin node to the destination based on calculation, simulation, or measurement, respectively

Summary

Introduction

The electric multiple units (EMU) are becoming increasingly advanced and intelligent with the new technology applied in the world railway system, such as the new types of CR (Fuxing in ChinaRailway) series in China in the last years. The electric multiple units (EMU) are becoming increasingly advanced and intelligent with the new technology applied in the world railway system, such as the new types of CR Train Control System (OTCS) has been spotlighted and investigated in the railway industry [1,2,3,4,5], because it may cause serious fault or failure when the electric and electronic parts are subjected to them. To ensure the safe operation of the EMU, system-level EMC analysis of OTCS is essential and it is regarded as one tough work with the following features. The OTCS is a complex system that the subsystems and components are distributed throughout the EMU. EM modeling and test for every EMC problem of subsystem require large-scale computation and massive measurement. The traditional solutions facing such a system-level assessment are limited

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Conclusion