DC fault protection of diode rectifier unit based HVDC system connecting offshore wind farms

Li, Rui and Yu, Lujie and Xu, Lie and Adam, Grain Philip (2018) DC fault protection of diode rectifier unit based HVDC system connecting offshore wind farms. In: 2018 IEEE Power & Energy Society General Meeting, 2018-08-05 - 2018-08-09, Oregon Convention Center. (https://doi.org/10.1109/PESGM.2018.8586510)

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Abstract

DC fault ride-through operations of the offshore wind farm connecting with diode rectifier unit (DRU) based HVDC link are presented in this paper. A voltage-error-dependent fault current injection is proposed to regulate the WT current during DC faults and to provide fault current. This contributes the control of the offshore AC voltage, which does not drop to zero but is remained relatively high to facilitate fast system recovery after clearance of a temporary DC fault. The WT converters operate on current limiting mode during DC faults and automatically restore normal operation after fault clearance. The full-bridge based modular multilevel converter (MMC) is adopted as the onshore station and its DC fault current control ability is explored to effectively suppress the fault current from the onshore station around zero, which reduces semiconductor losses and potential overcurrent risk of the MMC station. Simulation results confirm the robustness of the system to DC faults.

  • Item type:Conference or Workshop Item(Paper)
    ID code:63350
    Dates:
    Date
    Event
    24 December 2018
    Published
    17 February 2018
    Accepted
    Notes:© 2018 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:19 Feb 2018 16:29
    Last modified:14 Apr 2024 01:20
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/63350
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