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

A high-speed train, traction drive technology, applied in the field of system fault diagnosis, can solve problems such as long detection time and inability to accurately isolate faults, and achieve the effect of clear internal structure and inaccurate diagnosis of fault sources.

Active Publication Date: 2016-02-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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

Method used

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

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Embodiment Construction

[0046] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0047] refer to figure 1As shown, a CRH5 type high-speed train traction drive system IGBT fault diagnosis method of the present invention first builds a system bond graph model according to the actual physical model of the system, and then utilizes the method of quantitative analysis to construct residuals to carry out fault diagnosis work, including the following Specific steps:

[0048] 1) Modeling of traction component bond graph:

[0049] The bond graph method is based on the law of energy conservation and is suitable for the establishment of multi-energy domain system models. The corresponding variables of each energy domain are shown in Table 1:

[0050] Table 1 Energy variables and ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26
Inventor 勇佳棋姜斌陆宁云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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