AC/AC grid connection of six-phase wind power generator based on enneagon MMC converter

Shijia Zhou, Fei Rong, Wenlong Sun, Sheng Huang, Qiuwei Wu

Research output: Contribution to journalJournal articleResearchpeer-review


In this paper, an enneagon multi-level converter (E-MMC) is proposed, which can directly connect six-phase wind power generator to AC grid. It has the advantages of high efficiency, small fluctuation of capacitor voltage of sub-modules (SMs), and no need of step-up transformer. The working principle of the converter is analyzed, and the optimal phase shifting angle between the two windings of the six-phase wind turbine is determined under different boost ratios. The voltage stability control strategy of the converter and the current tracking control strategy based on proportional resonance (PR) are proposed. The simulation and experiment verify the effectiveness of the proposed system and its control strategy from both steady and transient aspects.
Original languageEnglish
Article number105810
JournalInternational Journal of Electrical Power and Energy Systems
Number of pages8
Publication statusPublished - 2020

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