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Reliability evaluation method for cascaded power electronic converter system

A technology for power electronics and converters, applied in the field of reliability evaluation of cascaded power electronic converter systems

Inactive Publication Date: 2021-06-08
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of quickly and easily realizing the reliability evaluation of cascaded power electronic converters, and propose a reliability evaluation method for cascaded power electronic converter systems

Method used

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  • Reliability evaluation method for cascaded power electronic converter system
  • Reliability evaluation method for cascaded power electronic converter system
  • Reliability evaluation method for cascaded power electronic converter system

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Embodiment Construction

[0043] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0044] Such as figure 1 As shown, the present invention provides a method for evaluating the reliability of a cascaded power electronic converter system, comprising the following steps:

[0045] S1: According to the state transition probabilities of the cascaded power electronic converter system, establish a state transition diagram of the cascaded power electronic converter system;

[0046] S2: Obtain the state space matrix equation of the cascaded power electronic converter system and the average transition probability matrix per unit time according to the state transition diagram of the cascaded power electronic converter system;

[0047] S3: Obtain the reliability function according to the state space matrix equation of the cascaded power electronic converter system and the average transition probability matrix per unit time, and perform reliability...

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Abstract

The invention discloses a reliability evaluation method for a cascaded power electronic converter system, and the method comprises the following steps: S1, building a state transition diagram according to the transition probability of each state of the cascaded power electronic converter system; S2, obtaining a state space matrix equation and an average transition probability matrix in unit time according to the state transition diagram; S3, obtaining a reliability function according to the state space matrix equation and the average transition probability matrix in unit time, and performing reliability evaluation according to the reliability function. According to the method, the fault operation state of the system is fully considered, and the fault-tolerant capability of the system can be comprehensively evaluated.

Description

technical field [0001] The invention belongs to the technical field of reliability evaluation of power equipment, and in particular relates to a reliability evaluation method of a cascaded power electronic converter system. Background technique [0002] At present, power electronic converter technology is the main development direction for the conversion and control of electric energy in modern electric power because of its strong controllability and high flexibility. Cascaded power electronic converters can overcome the limitations of current converters on withstand voltage and flow capacity, meet the needs of industrial development, and have broad application prospects. At the same time, the performance of the cascaded converter will directly affect the feasibility and operation performance of the project. Therefore, the research on the reliability evaluation method of cascaded converters has very important significance for its in-depth application and promotion. [0003...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/16G06F119/02
CPCG06F17/16G06F30/20G06F2119/02
Inventor 何晓琼荆蕾曾理杨爽韩鹏程舒泽亮
Owner SOUTHWEST JIAOTONG UNIV
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