Reliability Evaluation of MMC Converter Valve Module Considering Failure Mode of Metallized Film Capacitors

被引：0
作者：
Zha K. [1 ]
Cao J. [1 ]
Zheng M. [2 ]
Ren M. [1 ]
Yao R. [2 ]
Li H. [2 ]
机构：
[1] China EPRI Electric Power Engineering Co. Ltd., Beijing
[2] State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University), Chongqing
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2019年 / 43卷 / 04期
关键词：
Failure mode; Metallized film capacitor; Modular multilevel converter; Operation condition; Reliability evaluation;
D O I：
10.7500/AEPS20180709010
中图分类号：
学科分类号：
摘要：
The reliability of converter valve module directly affects the security operation of modular multilevel converter (MMC). However, the impact of the capacitor failure is usually neglected for the existing traditional reliability evaluation. A reliability analysis method on converter valve module considering the corrosion failure mode of metallized film capacitor is proposed. Firstly, the temperature field model of metallized film capacitor is established based on the structure and material properties of an actual capacitor, and the result of temperature distribution is compared and demonstrated. Secondly, based on the analysis of failure mode of metallized film capacitor, taking the corrosion failure as an example, the failure rate model of metallized film capacitor is obtained by considering the effect of the voltage and temperature acceleration factors. Finally, combining with the failure rate model of the wire-bonded insulated gate bipolar transistor (IGBT) device, a reliability analysis model of converter valve module considering the failure of metallized film capacitor is presented, and the failure rate of converter valve module under the rectifier and inverter operational conditions is calculated and compared. The results show that the proposed reliability analysis model could preferably evaluate the reliability of the converter valve module under different operational conditions. The failure of metallized film capacitor has a significant impact on the reliability of MMC converter valve module and the failure rate of converter valve module under the inverter condition is significantly higher than that under the rectifier condition. ©2019 Automation of Electric Power Systems Press.
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页码：86 / 93
页数：7
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