Novel data‑driven open‑circuit fault diagnosis method for modular multilevel converter submodules based on optimized deep learning

Yang An; Xiangdong Sun; Biying Ren; Xiaobin Zhang

Novel data‑driven open‑circuit fault diagnosis method for modular multilevel converter submodules based on optimized deep learning

Vol. 25, No. 1, pp. 58-70, Jan. 2025

10.1007/s43236-024-00877-3

Modular multilevel converters

Fault diagnosis

Whale optimization algorithm

Deep kernel extreme learning machine

Abstract

As the proportion of clean energy continues to increase, low carbon energy systems will be a significant way to achieve the goal of carbon neutrality. Therefore, the reliability of modular multilevel converters (MMCs) is particularly significant. However, conventional open-circuit fault diagnosis (OCFD) methods usually have a limited localization speed or are difficult to achieve in practical engineering. Therefore, a fast and simpled OCFD approach for MMC SMs based on an optimized deep learning is proposed in this article. In this approach, data on the of submodule capacitance voltages are input into a trained WOA-DKELM model without the manually settings. The problems of randomness in the regularization coefficient C and the kernel parameters K can be solved by DKELM with WOA optimization, which has a strong generalization capability and higher prognostic accuracy. The effectiveness of the proposed approach is verified by experiment results. This approach achieves an average identification probability of 0.96 within 20 ms of the fault.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

Y. An, X. Sun, B. Ren, X. Zhang, "Novel data‑driven open‑circuit fault diagnosis method for modular multilevel converter submodules based on optimized deep learning," Journal of Power Electronics, vol. 25, no. 1, pp. 58-70, 2025. DOI: 10.1007/s43236-024-00877-3.

[ACM Style]

Yang An, Xiangdong Sun, Biying Ren, and Xiaobin Zhang. 2025. Novel data‑driven open‑circuit fault diagnosis method for modular multilevel converter submodules based on optimized deep learning. Journal of Power Electronics, 25, 1, (2025), 58-70. DOI: 10.1007/s43236-024-00877-3.