For Safer High-Speed Trains: A Comprehensive Research Method of Electromagnetic Interference on Speed Sensors

Abstract

When the pantograph of a high-speed train is separated from the power supply line, a panto-graph-catenary arc (PCA) occurs. This generates electromagnetic interference (EMI) and additional undesired effects on the electrical equipment (such as speed sensors) on the train. It creates a safety hazard for high-speed train operation. This article presents a new method for dealing with EMI caused by the PCA on speed sensors of high-speed trains. The proposed method consists of carrying out an in-depth analysis of the different coupling modes of EMI to identify the corresponding interference suppression measures. Thus, the safety of train operation can be ensured. By changing some relevant parameters, the proposed method can also be applied to other types of trains and electrical equipment.