| Multi-mission profile reliability analysis method for heterogeneous converter |
| 投稿时间：2023-06-01 修订日期：2023-07-30 |
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| English Abstract: |
| Most existing studies on the reliability analysis of modular multi-level converter(MMC) focus on the converters with independent sub-module structures. However, there is still a lack of effective reliability analysis methods for heterogeneous topologies with low-cost and multi-mode. Therefore, the reliability analysis of heterogeneous converter is of great significance to extend its application boundary. The characteristics of heterogeneous MMC are summarized. Taking the embedded full-bridge MMC(EFB-MMC) as an example, a reliability modeling method suitable for heterogeneous MMC is proposed, which considers the multi-mission profile and the continuity of working state failure caused by bridge switching. By analyzing the different operating states of the converter, the Markov model is established and its redundancy configuration scheme is analyzed. Based on the simulation example, the reliability of EFB-MMC is calculated, and the influence of the redundant configuration of sub-modules on its reliability is analyzed. Compared with the traditional models, it is verified that the proposed method can provide a strategic reference for the reliability analysis and redundancy configuration of the heterogeneous MMC with multi-switch state. |
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| English and key words:modular multi-level converter reliability analysis Markov model multi-mission profile |
| 基金项目:直流输电技术全国重点实验室开放基金资助项目(SKLHVDC-2022-KF-05) |
| DOI：10.16081/j.epae.202308030 |
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