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- W4387682260 abstract "This paper presents a new multiplexed-stack converter (MSC) for high-voltage direct-current (HVDC) power conversion. The MSC reduces the number of stacks of submodules (SMs) needed for three-phase alternating-current (AC) systems from six, as in conventional modular multilevel converters (MMCs), to four, which can substantially decrease the size of converter stations. The MSC comprises two full-bridge submodule (FBSM) based OUTER stacks, two half-bridge submodule (HBSM) based INNER SM stacks, and director-switch (DS) valves to generate sinusoidal three-phase AC voltages. The MSC offers several benefits over existing converters: it can handle and block DC faults due to its FBSM-based OUTER stacks; it can attain high efficiency due to its HBSM-based INNER stacks; and it can ease valve design due to fundamental-frequency and zero-voltage-switching (ZVS) operation of its DSs. A sweet-spot operating voltage is derived where the OUTER and INNER stack energies are naturally balanced without the need of DC pole capacitors. For deviations from the sweet-spot voltage, DC-side pole capacitors enable energy balancing for the stacks. This paper presents HVDC-scale simulations and reduced-scale hardware experiments that confirm the MSC’s performance in real and reactive power conversion. The paper also contrasts the MSC with other state-of-the-art converters, indicating its competitive efficiency and compactness." @default.
- W4387682260 created "2023-10-17" @default.
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- W4387682260 date "2023-01-01" @default.
- W4387682260 modified "2023-10-17" @default.
- W4387682260 title "Multiplexed-Stack Converter with DC-Fault Ride-Through Capability and High Compactness" @default.
- W4387682260 doi "https://doi.org/10.1109/jestpe.2023.3324873" @default.
- W4387682260 hasPublicationYear "2023" @default.
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