A novel method to determine droop coefficients of DC voltage control for VSC-MTDC system

Li, Bin and Li, Qingquan and Wang, Yizhen and Wen, Weijie and Li, Botong and Xu, Lie (2019) A novel method to determine droop coefficients of DC voltage control for VSC-MTDC system. IEEE Transactions on Power Delivery. ISSN 0885-8977 (In Press)

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Abstract

For droop control in voltage source converter based multi-terminal HVDC systems, the determination of droop coefficients is a key issue, which directly affects both power distribution and DC control performances. This paper proposes a novel design of droop coefficients considering the requirements of power distribution, DC voltage control and system stability. Considering the power margins of different converters, the ratio relationship among droop coefficients is established. Converters with larger power margins take bigger portion of power mismatch to avoid overload problem. Furthermore, the integral square error of converters DC voltage is adopted as the DC voltage control performance index, and optimization of droop coefficients to achieve coordinated DC voltage control of steady-state deviation and transient variation, is derived. Finally, the constraint of droop coefficients is established to guarantee the DC system stability after power disturbance. Case studies are conducted on the Nordic 32 system with an embedded 4-terminal DC grid to demonstrate the feasibility and effectiveness of the proposed droop control scheme.

  • Item type:Article
    ID code:71086
    Dates:
    Date
    Event
    20 December 2019
    Published
    20 December 2019
    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:14 Jan 2020 11:39
    Last modified:09 Apr 2024 01:15
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/71086
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