Shared Redundancy Strategy to Improve the Reliability and Fault-Tolerant Capability of Modular Multilevel Converter
Shared Redundancy Strategy to Improve the Reliability and Fault-Tolerant Capability of Modular Multilevel Converter
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DOI：
10.1109/tie.2022.3181416
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发表时间：
2023-04
影响因子：
7.7
通讯作者：
Saleh Farzamkia;Houshang Salimian Rizi;A. Huang;H. Iman‐Eini
中科院分区：
文献类型：
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作者：
Saleh Farzamkia;Houshang Salimian Rizi;A. Huang;H. Iman‐Eini
利用冗余子模块是提高模块化多电平转换器（MMC）可靠性和容错能力的众所周知的策略。基于冗余的容错策略使得在故障后恢复转换器的全部性能成为可能。该策略的主要缺点是成本高。在此配置中，每个冗余子模块（RSM）只能在特定臂中使用，而不能在其他臂中使用。这一限制导致传统 MMC 中 RSM 的利用效率低下。本文提出了一种共享冗余策略，允许 RSM 用于上臂或下臂。各种案例研究中得出的可靠性模型表明，所提出的策略显着提高了 MMC 的可靠性和使用寿命。为了研究所提出策略的有效性，提供了模拟和实验结果。
Utilizing redundant submodules is a well-known strategy to improve the reliability and fault-tolerant capability of the modular multilevel converter (MMC). Redundancy-based fault-tolerant strategy makes it possible to restore the full performance of the converter in the postfault condition. The main drawback of this strategy is the high cost. In this configuration, each redundant submodule (RSM) can only be utilized in a specific arm and it cannot be used in other arms. This limitation leads to inefficient utilization of the RSMs in conventional MMC. This article proposes a shared redundancy strategy which allows RSMs to be used either in upper or lower arms. The derived reliability models in various case studies illustrate that the proposed strategy significantly improves the reliability and useful lifetime of MMC. To investigate the effectiveness of the proposed strategy, simulation and experimental results are provided.