Reliability Model of Flexible Multi-state Switch Considering the Uncertainty of Loading State

被引：0
|
作者：
Liu W. [1 ]
Xu Y. [1 ]
Li Q. [1 ]
Xu F. [2 ]
Wang C. [2 ]
Qiu P. [2 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing
[2] State Grid Zhejiang Electric Power Research Institute, Hangzhou, 310014, Zhejiang Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 06期
基金：
国家重点研发计划;
关键词：
Current loading expectation; Eight-state; Flexible multi-state switch; Monte Carlo simulation; Reliability model; Voltage loading;
D O I：
10.13334/j.0258-8013.pcsee.180434
中图分类号：
学科分类号：
摘要：
In order to characterize the effects of loadings on the reliability of flexible multi-state switch, an improved reliability modelling method was proposed. First, in view of the uncertainty of source and load, Monte Carlo simulation and optimal power flow method were combined to solve the current loading expectation of the insulated gate bipolar transistor (IGBT). On this basis, the equivalent reliability model of IGBT was obtained. Then, the relationship between the submodule (SM) failure rate and voltage loading was analyzed. Meanwhile, with the arm voltage balancing strategy considered, the dynamic reliability model of the arm was built under the SMs' successive failure condition, by means of mathematical induction. Thus, the reliability model of single-terminal modular multilevel converter (MMC) was improved. Finally, based on the Markov method, an eight-state reliability model for the flexible multi-state switch was established. By the numerical calculation, the reliability indices of IGBT, MMC converter and the entire device of the three terminals were obtained. In addition, the calculation results were compared with that obtained by traditional model, which validates the effectiveness and practicability of the proposed model. © 2019 Chin. Soc. for Elec. Eng.
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页码：1592 / 1602
页数：10
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