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| A Multiplexed Modular Multilevel Converter Based Battery Energy Storage System with DC Short-Circuit Fault Ride-through Capability |
| Yinyu Yan,Yichao Sun, Member, IEEE,Zhiyuan Fan,Carlos Alberto Teixeira, Member, IEEE,Minqiang Hu, Member, IEEE |
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| Abstract: |
| Energy storage systems support electrical grid stability by enabling strategies to tackle issues, such as power fluctuations, low inertia, and insufficient damping. The present study proposes a battery energy storage system based on a modular multilevel converter with multiplexed submodule arms (M-MMC-BESS) to reduce the number of switching devices while embedding DC short-circuit fault ride-through capability. Compared to the conventional two-stage half-bridge topology, the M-MMC-BESS retains the same number of switching devices but allows uninterrupted operation under DC short-circuit faults. In addition, compared to the two-stage full-bridge topology, the proposed topology reduces the number of switching devices by one-third. The control of the M-MMC-BESS is thoroughly investigated under both normal and DC short-circuit operating conditions. Simulation and experimental results are used to demonstrate the effectiveness of the proposed system and control approach. |
| Key words: Modular multilevel converter (MMC), battery energy storage system (BESS), multiplexed submodule, DC short-circuit fault ride-through |
| DOI：10.23919/PCMP.2023.000306 |
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| Fund:This work is supported by the National Natural Science Foundation of China (No. 52277188) and the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province (No. 22KJB470005). |
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