H∞-Based Double Grid Forming Controller of Multi-Modular Converters in a Hybrid AC/DC Grid

Eder Baron-Prada (Speaker), Adolfo Anta, Markus Makoschitz, Florian Dörfler

    Research output: Chapter in Book or Conference ProceedingsConference Proceedings with Oral Presentationpeer-review

    Abstract

    The power system is witnessing an increasing penetration of power converters due to the integration of renewables, HVDC, DC and AC microgrids, etc. In line with this increasing penetration, the system needs units with grid-forming capabilities on the AC and DC sides. We propose a dual grid forming controller for power converters, particularly for modular multilevel converters (MMC), that forms the voltage in the DC grid and voltage and frequency on the AC grid. Nowadays, the parameter tuning of MMC controllers heavily relies on manual effort and rich engineering experience, which usually leads to suboptimal power system operation. Instead, we propose an optimal H∞ controller, which considers AC and DC grid dynamics. We impose grid-forming conditions, among other control objectives, by using weighting functions. Finally, using a simple AC/DC grid we demonstrate that the proposed double grid forming algorithm is suitable for hybrid grid applications.
    Original languageEnglish
    Title of host publicationProceedings COMPEL 2023
    ISBN (Electronic)979-8-3503-1618-6
    DOIs
    Publication statusPublished - 25 Jun 2023
    EventIEEE 24th Workshop on Control and Modeling for Power Electronics (COMPEL) 2023 - Ann Arbor, Ann Arbor, United States
    Duration: 25 Jun 202328 Jun 2023

    Conference

    ConferenceIEEE 24th Workshop on Control and Modeling for Power Electronics (COMPEL) 2023
    Country/TerritoryUnited States
    CityAnn Arbor
    Period25/06/2328/06/23

    Research Field

    • Power Electronics and System Components

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