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    A Novel Converter Station Structure for Improving Multiterminal HVDC System Resiliency Against AC and DC Faults

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    Date
    2020
    Author
    Wang, S.
    Ahmed, K.H.
    Adam, G.P.
    Massoud, Ahmed
    Williams, B. W.
    Metadata
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    Abstract
    In an effort to minimize the power disruption between a dc grid and ac grids that host power converters during ac and dc network faults, this paper proposes a novel converter station structure to improve ac and dc fault ride-through performance of the multiterminal HVdc grid. The proposed structure consists of two independent ac and dc interfacing circuits, which are a half-bridge modular multilevel converter and a cascaded H-bridge (CHB) based energy storage system. Taking the advantages of high controllability and flexibility of the independent CHB converter and ease of integrating energy modules, a decoupled power relationship between the ac and dc sides is achieved, which is important for enhancing ac and dc fault performance. Operation of the proposed converter station under normal conditions and during ac and dc faults is explained, with the control system presented. Simulation validation of the proposed structure on a three-terminal HVdc grid confirms the enhanced performance, including the continuous operation during ac and dc faults with negligible power transfer disruption.
    DOI/handle
    http://dx.doi.org/10.1109/TIE.2019.2926036
    http://hdl.handle.net/10576/28735
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    • Electrical Engineering [‎2821‎ items ]

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