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This paper proposes a new modular multilevel converter based unified power quality controller (MMC-UPQC). As one of the key technologies of MMC-UPQC, the start strategy is discussed and combined with the establishment of the DC side capacitance voltage. In this paper, the main circuit of MMC-UPQC and the operating states of MMC sub-modules (SMs) are described in detail. Two start control strategies...
This paper proposes a new configuration of a unified power quality conditioner based on modular multilevel converter (MMC-UPQC), which applies to medium voltage level with increasing the number of sub-modules. In this paper, the main circuit of MMC-UPQC and the operating principle of MMC sub-module are described in detail. The classical synchronous-reference-frame (SRF)-based detection and control...
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