IGBT fault diagnosis method for traction drive system of CRH5 type high-speed train

Abstract

The invention discloses an IGBT fault diagnosis method for a traction drive system of a CRH5 type high-speed train, and the method comprises the steps: modeling a traction part bonding graph: respectively building a traction inverter model, a traction motor model, and a gearbox bonding graph model; carrying out system modeling: building a traction drive system model of a high-speed train, and simulating the operation states when the system is normal and an IGBT fault happens; building a global analysis redundancy relation: building a simplified system global analysis redundancy relation, obtaining a fault characteristic matrix, and analyzing a system fault propagation approach; carrying out fault diagnosis: enabling system output to be substituted into the global analysis redundancy relation, forming a residual error set and a consistency vector, comparing the residual error set and the consistency vector with the fault characteristic matrix, and detecting the health state of the system, and positioning an IGBT fault source. The method diagnoses the IGBT fault of the traction drive system of the high-speed train through employing a bonding graph method, builds the motor model through multiple bonding graphs, carries out the unified modeling of an electromechanical system, achieves the positioning of an IGBT element with a fault, and provides a solution for the modeling of the traction drive system of the CRH5 high-speed train and the diagnosis of the IGBT fault.

Description

technical field [0001] The invention belongs to the technical field of system fault diagnosis, and in particular refers to a method for diagnosing an IGBT fault of a CRH5 type high-speed train traction drive system. Background technique [0002] The high-speed train operation system is a large-scale and complex engineering system, which is closely related to the personal and property safety of passengers, so it has extremely high requirements for system reliability. The traction drive system is a key component of the EMU. Due to the complex energy domain coupling relationship between components, component failures are easy to propagate and spread, affecting the normal and stable operation of the entire system. Inverter IGBT components are very important and fault-prone links in the traction system of CRH5 high-speed trains. The fault diagnosis and propagation mechanism research of IGBT components are current research hotspots and urgent needs of enterprises. [0003] Existi...

AI Technical Summary

Problems solved by technology

[0003] Existing inverter IGBT fault diagnosis technology has shortcomings such as long detection time and inability to accurately isolate faults, which cannot meet actual needs

Images