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 syst...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.展开更多
基金supported by the National Natural Science Foundation of China(No.52277188)the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province(No.22KJB470005).
文摘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.
