Impact of strength and proximity of receiving AC systems on cascaded LCC-MMC hybrid HVDC system

He, Yongjie and Xiang, Wang and Ni, Binye and Lu, Xiaojun and Wen, Jinyu (2021) Impact of strength and proximity of receiving AC systems on cascaded LCC-MMC hybrid HVDC system. IEEE Transactions on Power Delivery. ISSN 0885-8977 (https://doi.org/10.1109/TPWRD.2021.3073896)

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Abstract

The cascaded hybrid LCC-MMC inverter is considered as a feasible option to mitigate the commutation failure problem of conventional LCC-HVDC while maintaining bulk power transmission capability. However, the coupling between different types of converters may result in instability when the inverter integrates with weak AC systems. This paper establishes a small-signal model of the cascaded LCC-MMC inverter based hybrid HVDC system and validates the model against PSCAD/EMTDC. Through eigenvalue analysis, the impact of the strength and proximity of receiving AC systems on the small-signal stability is investigated, and the stable zone of the strength of receiving AC systems is identified. Besides, a supplementary coupling mitigation control is proposed to tackle the instability problem under weak AC systems integration. Both analytical results and time-domain simulations demonstrate the validity of the supplementary control.

  • Item type:Article
    ID code:76902
    Dates:
    Date
    Event
    16 April 2021
    Published
    14 April 2021
    Accepted
    Notes:© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:29 Jun 2021 10:40
    Last modified:09 Apr 2024 02:30
    URI:https://strathprints.strath.ac.uk/id/eprint/76902
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