An Online Monitoring Scheme of Equivalent Series Resistance for DC-Link Capacitor of High-Power AC Converter

被引：0
|
作者：
Sun P. [1 ]
Gong C. [1 ]
Du X. [1 ]
Peng Y. [1 ]
Wang H. [1 ]
Zhou L. [1 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University), Shapingba District, Chongqing
来源：
| 1600年 / Chinese Society for Electrical Engineering卷 / 37期
基金：
中国国家自然科学基金;
关键词：
DC-link capacitor; Equivalent series resistance (ESR); Online monitoring; Reliability; Short-circuit current;
D O I：
10.13334/j.0258-8013.pcsee.161578
中图分类号：
学科分类号：
摘要：
Finding and replacing the degraded capacitor timely by online monitoring the ageing state of capacitor can greatly improve the reliability of power converter. This paper presented an online condition monitoring method of ESR for DC-link capacitor of high-power AC converter based on short-circuit current, which can accurately measure the equivalent series resistance (ESR) of DC-link capacitor during the normal operation of power converter. The theory of online monitoring for DC-link capacitor was introduced in detail at first. Then, the influence of short-circuit test on the operation of power converter was discussed. Finally, the ESR of DC-link capacitor in a 2kW single-phase DC/AC converter was tested online by the online monitoring method proposed in this paper, and the ESR of DC-link capacitor can be accurately measured by this method. This method is suitable for single-phase or three-phase DC/AC, AC/DC, or AC/DC/AC power converters, and will not limited by the operation conditions of power converter. © 2017 Chin. Soc. for Elec. Eng.
引用
收藏
页码：5134 / 5142
页数：8
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