Analysis of the influence of strong electromagnetic pulse interference on the performance of traction brake system

In the complex electromagnetic environment encountered during train operation, the traction braking system, as the primary power unit distributed throughout the train, is highly vulnerable to serving as a coupling pathway for strong external electromagnetic interference (EMI) into the train's internal systems. This can adversely affect the normal operation of onboard equipment. Existing research predominantly focuses on analyzing the traction braking system as a source of electromagnetic disturbance, often overlooking its potential role as a coupling conduit for external EMI. In light of this, the present study investigates the influence of external strong EMI coupling into the traction braking system. By constructing a simulation model of the train's traction converter in ANSYS Simplorer, and incorporating Simulink for co-simulation, the study examines the effects of strong electromagnetic pulse signals generated by pantograph-catenary disconnection on the traction braking system. The findings indicate that, following interference, the harmonic distortion increases significantly after passing through the rectifier. Furthermore, after passing through the inverter, the line voltage supplied to the motor increases by 300V, accompanied by a substantial rise in harmonic distortion, which poses a serious risk to the normal operation of sensitive undercarriage equipment.