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By analyzing the topology and mathematical model of modular multilevel converters (MMCs), a control scheme based on the energy reallocation is proposed to control the MMC with redundant submodules. This control scheme is not only appropriate for the MMC in normal state but also applicable to the MMC in submodules fault state. Considering the circulating currents characteristics of the MMC in submodule...
By analyzing the topology and mathematical model of modular multilevel converters (MMCs), a control scheme is proposed to control the MMC in sub-module fault state based on phase energy controller. An AC-DC decoupled model is built to analyze and design the phase energy controller. In addition, by analyzing the mechanism of circulating currents for MMC in sub-module fault state, a new circulating...
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