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This paper proposes an operational improvement of MMC (Modular Multilevel Converter) with redundancy SMs (sub-modules) by a new scheme of NLC (Nearest Level Control), which can offer reduction of voltage harmonics and switching loss. The feasibility of proposed scheme was verified through computer simulations with PSCAD/EMTDC software. Based on simulation results, a hardware prototype of 10kVA, DC-1000V...
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