Reliability Research of Cascade Converter for Advanced Traction Power Supply System

被引：0
|
作者：
He X. [1 ,2 ]
Jing L. [1 ]
Han P. [1 ]
Zeng L. [1 ]
Gao S. [1 ,2 ]
机构：
[1] School of Electrical Engineering, Southwest Jiaotong University, Chengdu
[2] National Rail Transit Electrification and Automation Engineering Technology Research Center, Chengdu
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2023年 / 45卷 / 08期
关键词：
cascade converter; Markov; redundancy design; reliability model; state transition probability;
D O I：
10.3969/j.issn.1001-8360.2023.08.006
中图分类号：
学科分类号：
摘要：
Aiming at the cascade converter, which is the core equipment of the advanced traction power supply system, a reliability evaluation method considering the full operating state of the converter was proposed and reliability optimization was studied, providing a basis for the application and promotion of new traction power supply system. Based on the fault tree analysis and Markov theory, the reliability models of submodule and itself of cascade converter were established in stages. Meanwhile, a calculation method of state transition probability considering the normal, survival and failure states of cascade converter was proposed. In order to meet the high reliability design requirements required for new system engineering applications, the reliability optimization methods for converters were further studied: Using the established reliability model, a quantitative analysis was conducted on the importance degree of different key devices to identify the weak parts of the reliability of the converter. Reliability optimization was studied from two levels; device redundancy and sub-module redundancy, to compare with the optimization effects of backup redundancy and working redundancy. Along with the analysis of the reliability improvement of the converter with different redundancy numbers, the accuracy of the established model was verified. Finally, a comprehensive redundancy strategy was designed, and its effectiveness was verified by a numerical example. © 2023 Science Press. All rights reserved.
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页码：47 / 56
页数：9
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