A two-stage power dispatching algorithm for system support by droop-controlled DC grids

Y. Li, Z. Xu, Kitpo Wong, L.L. Lai

    Research output: Chapter in Book/Conference paperConference paper

    Abstract

    © 2015 IEEE. This paper presents a two-stage algorithm to regulate the power flow among a Multi-Terminal DC (MTDC) grid with DC voltage droop controllers to provide system support for the surrounding AC systems. At stage one, DC voltage of each terminal is calculated with the proposed analytical model to track the power demand of AC systems determined by the system operator. At stage two, power initial set points or DC droops of the droop controllers are modified according to the calculated DC voltage in the first stage. The proposed algorithm can accurately and quickly track the power demand from AC systems to provide system support under the system frequency disturbances. A four-terminal MTDC grid was modeled in the DIgSILENT/PowerFactory to demonstrate the effectiveness of the proposed algorithm.
    Original languageEnglish
    Title of host publicationIEEE Power and Energy Society General Meeting
    PublisherWiley-IEEE Press
    Pages1-5
    Volume2015-September
    ISBN (Print)9781467380409
    DOIs
    Publication statusPublished - 2015
    Event2015 IEEE Power and Energy Society General Meeting - Denver, United States
    Duration: 26 Jul 201530 Jul 2015

    Conference

    Conference2015 IEEE Power and Energy Society General Meeting
    CountryUnited States
    CityDenver
    Period26/07/1530/07/15

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    Cite this

    Li, Y., Xu, Z., Wong, K., & Lai, L. L. (2015). A two-stage power dispatching algorithm for system support by droop-controlled DC grids. In IEEE Power and Energy Society General Meeting (Vol. 2015-September, pp. 1-5). Wiley-IEEE Press. https://doi.org/10.1109/PESGM.2015.7285759