@inproceedings{e44d0359f3234a80ae4fa122b453853f,
title = "Condition monitoring method for submodule capacitor in modular multilevel converter",
abstract = "As a key component in modular multilevel converter (MMC), the reliability of submodule (SM) capacitor is a major concern. To get the health state of SM capacitor and take proactive action, this paper develops a condition monitoring method without any extra sensors or complicated algorithms. In the proposed method, one SM in each arm is bypassed symmetrically at a time, and the energy stored in each capacitor dissipates through the internal bleeding resistor. The discharging time proves to be an effective indicator of capacitor degradation. The information of all SMs are acquired with a proper rotating sequence. This condition monitoring process could be enabled regularly and demonstrate the degradation trend accurately. Besides, it does not affect the normal operation of MMC, and works well in different control or modulation strategies. Experimental results verify the feasibility of the proposed method.",
keywords = "Capacitor, Condition monitoring, Discharging, Modular multilevel converter (MMC)",
author = "Hanyu Wang and Huai Wang and Yi Zhang and Zhongxu Wang and Xuejun Pei and Yong Kang",
note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 ; Conference date: 17-03-2019 Through 21-03-2019",
year = "2019",
month = may,
day = "24",
doi = "10.1109/APEC.2019.8721821",
language = "British English",
series = "Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "344--348",
booktitle = "34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019",
address = "United States",
}