Overview and Prospect of Control and Condition Monitoring of Train Electric Traction Systems
As the"heart"of high-speed trains/electric locomotives,the continuous innovation of electric traction systems is the key to promoting technological progress in trains.This article provides an overview of the topology,control technology,status monitoring,and fault diagnosis of the electric traction system for trains.The application status of two-level electric traction system topology in high-speed trains in China is summarized,and the advantages of three-level topology and the application prospect of silicon carbide devices in traction converters are discussed.Furthermore,the traditional control methods of single-phase pulse rectifier are reviewed,the optimal control and full-speed multi-mode modulation strategies of high power traction motor are summarized,and the development trend of new generation model predictive control technology is discussed.In addition,the aging and failure mechanism of key components of traction converter is sorted out,the typical failure modes of traction motor are summarized,and the research status of condition monitoring and fault diagnosis technology of traction system is studied.Finally,the development trends of key technologies for topology,control,and monitoring of train traction systems are discussed.
electric traction systemcontrol techniquecondition monitoring