Reliability modeling and analysis of MMC converter valve considering operation conditions

被引：0
|
作者：
Li H. [1 ]
Deng J. [1 ]
Yao R. [1 ]
Lai W. [1 ]
Kang S. [1 ]
Jiang Z. [1 ]
Li J. [2 ]
Li Y. [2 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
[2] State Key Laboratory of Advanced Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing
来源：
| 2018年 / Electric Power Automation Equipment Press卷 / 38期
关键词：
Fault tree; HVDC power transmission; MMC converter valves; Operation conditions; Reliability model; Weak parts;
D O I：
10.16081/j.issn.1006-6047.2018.10.017
中图分类号：
学科分类号：
摘要：
As the core equipment of HVDC(High Voltage Direct Current) transmission system, the reliability of MMC(Modular Multilevel Converter) converter valve is related to the safe and stable operation of the whole transmission system. Considering the influence of working condition, the reliability model is established and the weak components are analyzed for the traditional HVDC transmission MMC converter valve based on the fault tree analysis method. Firstly, the failure rate models of IGBT and diode are established considering the influence of operating conditions. Then, the fault tree model of the MMC converter valve is established by the fault tree analysis method, and the corresponding reliability index formulas are obtained considering the power module and peripheral control protection system. Finally, the failure rate of each component is calculated according to the reliability index formula, and the weak components of the MMC converter valve are identified based on the probability sensitivity and the critical sensitivity indexes. The results show that the failure rate of the MMC converter valve and component is biggest under the conditions of rectifier and inverter, and the failure rate is smallest under pure reactive power condition, the IGBT module and the power supply are the weak components of the MMC valve, and the performance of the MMC sub-module has the most significant influence on the reliability of the valve. © 2018, Electric Power Automation Equipment Press. All right reserved.
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页码：108 / 114
页数：6
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