A single-end protection scheme for hybrid MMC HVDC grids considering the impacts of the active fault current-limiting control

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Yang, Saizhao and Xiang, Wang and Zhou, Meng and Zuo, Wenping and Wen, Jinyu (2020) A single-end protection scheme for hybrid MMC HVDC grids considering the impacts of the active fault current-limiting control. IEEE Transactions on Power Delivery. ISSN 0885-8977 (https://doi.org/10.1109/TPWRD.2020.3017895)

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Abstract

In the hybrid modular multilevel converter (MMC) based high voltage direct current (HVDC) systems, the fault current can be actively suppressed by the converter itself, which endows a smaller requirement for current-limiting reactors (CLR) and a larger time margin for fault detection algorithms, comparing with the half-bridge MMC. But the robustness to fault resistance and noise disturbance of existing boundary protection schemes will be deteriorated with small CLRs. Moreover, the fast response of the fault current-limiting control will change the output DC voltage of hybrid MMC, which affects the fault characteristics and may cause mal-operation of existing protection algorithms. Thus, a single-end protection scheme considering the impacts of the active current-limiting control is proposed for the hybrid MMC based DC grids. The traveling-wave characteristics under different fault stages are analyzed to evaluate the impacts of the fault current-limiting control. In addition, a coordination protection strategy versus different fault conditions is adopted to improve reliability. Various cases in PSCAD/EMTDC are simulated to verify that the proposed method is robust to fault resistance, fault distance, power reversal, AC faults, and immune to noise.

ORCID iDs

Yang, Saizhao, Xiang, Wang ORCID logoORCID: https://orcid.org/0000-0002-4619-5849, Zhou, Meng, Zuo, Wenping and Wen, Jinyu;
  • Item type:Article
    ID code:74219
    Dates:
    Date
    Event
    19 August 2020
    Published
    19 August 2020
    Published Online
    17 August 2020
    Accepted
    Notes:© 2020 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:12 Oct 2020 15:14
    Last modified:18 Dec 2024 17:02
    URI:https://strathprints.strath.ac.uk/id/eprint/74219
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