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Analysis of the Hybrid ARM Modular Multilevel Converter in DC-Fault Blocking State and Post-Fault Condition

机译:直流故障闭锁状态和故障后条件下的混合ARM模块化多电平转换器分析

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A hybrid arm MMC with half-bridge arms close to the grounding pole and full-bridge arms away from the grounding pole is studied. Different operating modes of the converter in dc fault blocking state are explained. For each operating mode, the differential equation of fault current is derived. Then, the sufficient condition for blocking the fault current is extracted. Also, a mathematical formula is introduced for the estimation of maximum blocking time. Finally, the STATCOM operation in the fault period and smooth voltage build-up capability of the hybrid arm MMC are explained. All theoretical claims and the converter behavior are verified by simulations.
机译:研究了一种混合臂MMC,其半桥臂靠近接地极,而全桥臂则远离接地极。说明了处于直流故障阻止状态的转换器的不同运行模式。对于每种工作模式,导出故障电流的微分方程。然后,提取阻止故障电流的充分条件。此外,引入了数学公式来估计最大阻塞时间。最后,说明了故障期间的STATCOM操作以及混合臂MMC的平稳电压建立能力。通过仿真验证了所有理论上的主张和转换器的行为。

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