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High-speed train traction system composite fault dynamic risk analysis method based on characteristic quantity

A technology for complex faults and high-speed trains, applied in the field of risk analysis of high-speed trains, can solve problems such as high real-time security requirements, inability to realize risk analysis and assessment, and few researches on complex fault mechanisms and risk evolution propagation

Inactive Publication Date: 2019-07-05
TSINGHUA UNIV
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Problems solved by technology

[0007] In the existing literature, there are many studies on the mechanism of common faults in the traction system of high-speed trains, but in the actual operation of the traction system of high-speed trains, compound faults occur from time to time, and there are few studies on the mechanism of compound faults and risk evolution and propagation. In addition, high-speed trains As one of the important subsystems in high-speed trains, the traction system has high requirements for real-time safety, and the existing static risk analysis and evaluation cannot realize real-time risk analysis and evaluation
Once a composite fault occurs, the faulty train must be repaired and maintained, which will directly affect the transportation and capacity of the railway system. However, in the existing static risk analysis and evaluation, few studies have included factors such as transportation operation and maintenance into the risk Analysis chain

Method used

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  • High-speed train traction system composite fault dynamic risk analysis method based on characteristic quantity
  • High-speed train traction system composite fault dynamic risk analysis method based on characteristic quantity
  • High-speed train traction system composite fault dynamic risk analysis method based on characteristic quantity

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Embodiment 1

[0066] Embodiment 1 of the present invention provides a kind of high-speed train traction system compound failure dynamic risk analysis method based on feature quantity, such as figure 1 As shown, the method includes the following steps:

[0067] S1: Construct the composite failure risk chain of the high-speed train traction system, and obtain the composite failure rate P based on the characteristic quantity in the composite failure risk chain;

[0068] In step S1, when constructing the composite fault risk chain, taking the traction system of CRH2 high-speed train as an example, the functional structure diagram of the traction inverter system is as follows figure 2 As shown, the main circuit diagram of the three-level traction inverter is shown in image 3 As shown, taking the U-phase as an example, by controlling the on-off of T11, T12, T13, and T14, the U-phase output can be obtained O and Three levels of voltage, where U d is the DC side voltage. U, V, W three-phas...

Embodiment 2

[0156] The risk case analysis was carried out based on the actual operating route of the "Chengdu-Chongqing Passenger Dedicated Line" in November 2017. The model of the operating train is CRH380D, and the train capacity is 556 people, and a total of 1,000 people are approved according to 16 formations per train.

[0157] The specific situation of the risk case is as follows: on the G8713 train from Chengdu East Station to Chongqing North Station at 14:59, the IGBT junction temperature was measured to rise to 100°C at the section from Zizhong North Station to Neijiang North Station, which corresponds to an abnormal increase in the temperature of the traction motor. Failure rate λ 复合 (ΔT)=2.294×10 -14 e 0.09033*100 =1.9212×10 -10 , the stator temperature of the traction motor is about 120°C, the duration is 90 minutes, the corresponding dielectric loss tangent tanδ=2.3, and the failure rate of the traction motor λ(tanδ)=1.919×10 - 13 e 9.626*2.3 =7.9117×10 -4 , so far, the...

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Abstract

The invention provides a high-speed train traction system composite fault dynamic risk analysis method based on characteristic quantity. According to the method, a fault chain of a traction motor fault caused by an IGBT open circuit of a high-speed train traction inverter and a small gain coefficient of a speed sensor is analyzed; mathematical modeling is carried out by utilizing a fault mechanismto obtain a curve of the fault rate of the traction motor along with change of tan[sigma], and a composite fault risk chain taking the IGBT junction temperature rise and the motor stator temperatureas characteristic quantities is established. Meanwhile, the risk chain analysis is extended to a specific line scene; risk consequence assessment, the risk consequence is decomposed by using an accident tree analysis method; an evaluation system with transportation operation and maintenance as main consideration factors is established, grey clustering processing is carried out on all index valuesthrough a whitening weight function, risk analysis is carried out on risks caused by composite faults, the risk levels of the risks are obtained respectively, and a theoretical basis is provided for making and implementing emergency measures.

Description

technical field [0001] The invention belongs to the technical field of risk analysis of high-speed trains, and in particular relates to a method for dynamic risk analysis of compound faults in traction systems of high-speed trains based on characteristic quantities. Background technique [0002] After years of development, China's rail transit system has made great progress and key breakthroughs. The development of high-speed railways and high-speed trains has also brought new safety issues and challenges, which have attracted great attention. According to statistics from the China Academy of Railway Sciences, accidents caused by high-speed train traction system risks or failures account for about 20% of the total number of accidents, occupying a relatively high proportion. The traction system is the core part of the power generation and transmission of high-speed trains. If the traction system breaks down, the train will lose its traction, and the driver must stop immediat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0635G06Q10/06395G06Q50/26
Inventor 孙新亚岳杨腾飞董炜吉吟东
Owner TSINGHUA UNIV
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