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- W4310449731 abstract "This paper determines new design and control requirements of a grid-tied full-bridge Modular Multilevel Converter (MMC) connected to a diode-bridge front-end without passive components in the dc-link for wind energy conversion systems. It develops a new steady-state model of the full-bridge MMC with non-ideal dc-link voltage where MMC input impedance ( <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$Z_{MMC}$</tex> ) is modelled as a function of MMC parameters including the dc-link dominant harmonic frequency. The analysis reveals that the ripple in the dc-link can create a new resonance frequency of the MMC sub-modules and arm inductances, in addition to the conventional second-order resonance frequency, which however can be prevented by optimal selection of MMC parameters to avoid conditions at which <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$Z_{MMC}$</tex> equals to zero. Furthermore, the paper proposes a new MMC control structure to actively suppress current harmonics in the dc-link and MMC arms leading to elimination of input-filter requirements in the proposed topology. The developed average model and control are verified through simulation tests." @default.
- W4310449731 created "2022-12-10" @default.
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- W4310449731 date "2022-10-09" @default.
- W4310449731 modified "2023-10-14" @default.
- W4310449731 title "Analysis and Control of Grid-Tied Modular Multilevel Converters with a Passive Front-End Rectifier without LC Filter in the DC-Link" @default.
- W4310449731 doi "https://doi.org/10.1109/ecce50734.2022.9947711" @default.
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