On the Stability of Power Electronics-Dominated Systems: Challenges and Potential Solutions

Qiao Peng, Qin Jiang, Yongheng Yang, Tianqi Liu, Huai Wang, Frede Blaabjerg

    Research output: Contribution to journalArticlepeer-review

    122 Scopus citations

    Abstract

    The modern power system is becoming more complicated due to the ever increasing penetration of power electronics, which is referred to as a power-electronics-dominated system (PEDS). In this case, the analysis, control, and operation of the entire power system should tone with the energy-paradigm transition pace, where the challenges should be properly tackled. After the brief introduction of grid-connected converters, this article explores stability challenges of PEDSs, especially on the low inertia issue and multitimescale characteristics, as well as the dynamics when connected to weak grids. The low inertia issue is considered as one of great challenges that power electronics introduce to the conventional power grid. Accordingly, the stability issues of PEDSs are discussed. The exploration reveals that the multitimescale coupling among various control loops and the mutual effects of multiple converters demand much more attention than ever before. The coordinated control of converters for the global stability of PEDSs is also summarized, part of which offers the possibility to solve the inertia problem. This article serves as an inspiration on potential solutions to these issues. In order to provide a more intuitive impression of the inertia problem in PEDSs, a case study is exemplified to highlight the analysis and discussion.

    Original languageBritish English
    Article number8809097
    Pages (from-to)7657-7670
    Number of pages14
    JournalIEEE Transactions on Industry Applications
    Volume55
    Issue number6
    DOIs
    StatePublished - 1 Nov 2019

    Keywords

    • Low-inertia systems
    • modeling
    • multitimescale analysis
    • mutual effect
    • power electronic converters
    • power-electronics-dominated systems (PEDSs)
    • stability and control
    • virtual inertia

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