Review of electromagnetic interference formation mechanisms and suppression methods in high-speed train traction drive systems

The traction drive system is a crucial component of high-speed trains, responsible for transferring and converting energy. It plays a vital role in ensuring the train operates safely and stably. As high-speed electrified railways continue to advance, the traction drive system is becoming increasingly crowded with various electrified equipment. This results in a growing issue of electromagnetic interference, particularly in the form of conducted electromagnetic interference. This interference significantly hampers the safe and efficient functioning of the rail transit system. This paper provides a concise overview of the working principle of the traction drive system. It also summarizes the formation mechanism of electromagnetic interference in the system and the typical coupling paths of the interference. Additionally, it discusses modelling methods and suppression measures for conduction electromagnetic interference, considering factors such as the source of the interference, coupling paths, sensitive equipment, and grounding. An in-depth analysis is conducted on the issue of electromagnetic interference in traction drive systems. This analysis serves as a theoretical foundation and a decision making reference for the design of electromagnetic compatibility in future traction drive systems.