An Efficient Reduced-Order Model for Studying Synchronization Stability of Grid-Following Converters during Grid Faults

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Renewable energy sources interfaced with the grid through power-electronic converters may lose stability and capability to perform as desired when exposed to severe grid faults. As a result of this, transient stability analysis and assessment are particularly important for power system studies. Usually, synchronization stability and transient stability analysis are performed by simulation studies containing a large amount of details, which makes this process highly time-consuming for large-scale systems. To circumvent this issue, a nonlinear second-order model is developed to capture the essential effects of the synchronization process of grid-tied converters during faults. Due to this low-order model, the stability assessment can be approached using phase-plane analysis with a low computational burden - more than 4000 times faster than the full-order switching model. The simplified model is verified against a detailed switching model and laboratory setup of the entire converter system indicating a high accuracy (>96%). Accordingly, the simplified reduced-order model can be used for accurate transient stability studies when a low availability of computational power is present, if large-scale systems are considered, or for detailed uncertainty and sensitivity analysis.
OriginalsprogEngelsk
TitelProceedings of 2019 IEEE COMPEL
Antal sider7
ForlagIEEE Press
Publikationsdatojun. 2019
StatusAccepteret/In press - jun. 2019

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Synchronization
Large scale systems
Uncertainty analysis
Power electronics
Sensitivity analysis
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    @inproceedings{62227edf727941ed9a8d2e336804333b,
    title = "An Efficient Reduced-Order Model for Studying Synchronization Stability of Grid-Following Converters during Grid Faults",
    abstract = "Renewable energy sources interfaced with the grid through power-electronic converters may lose stability and capability to perform as desired when exposed to severe grid faults. As a result of this, transient stability analysis and assessment are particularly important for power system studies. Usually, synchronization stability and transient stability analysis are performed by simulation studies containing a large amount of details, which makes this process highly time-consuming for large-scale systems. To circumvent this issue, a nonlinear second-order model is developed to capture the essential effects of the synchronization process of grid-tied converters during faults. Due to this low-order model, the stability assessment can be approached using phase-plane analysis with a low computational burden - more than 4000 times faster than the full-order switching model. The simplified model is verified against a detailed switching model and laboratory setup of the entire converter system indicating a high accuracy (>96{\%}). Accordingly, the simplified reduced-order model can be used for accurate transient stability studies when a low availability of computational power is present, if large-scale systems are considered, or for detailed uncertainty and sensitivity analysis.",
    keywords = "Grid fault, Transient Stability, Reduced-order model, Grid-connected converters",
    author = "Taul, {Mads Graungaard} and Xiongfei Wang and Pooya Davari and Frede Blaabjerg",
    year = "2019",
    month = "6",
    language = "English",
    booktitle = "Proceedings of 2019 IEEE COMPEL",
    publisher = "IEEE Press",

    }

    An Efficient Reduced-Order Model for Studying Synchronization Stability of Grid-Following Converters during Grid Faults. / Taul, Mads Graungaard; Wang, Xiongfei; Davari, Pooya; Blaabjerg, Frede.

    Proceedings of 2019 IEEE COMPEL. IEEE Press, 2019.

    Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

    TY - GEN

    T1 - An Efficient Reduced-Order Model for Studying Synchronization Stability of Grid-Following Converters during Grid Faults

    AU - Taul, Mads Graungaard

    AU - Wang, Xiongfei

    AU - Davari, Pooya

    AU - Blaabjerg, Frede

    PY - 2019/6

    Y1 - 2019/6

    N2 - Renewable energy sources interfaced with the grid through power-electronic converters may lose stability and capability to perform as desired when exposed to severe grid faults. As a result of this, transient stability analysis and assessment are particularly important for power system studies. Usually, synchronization stability and transient stability analysis are performed by simulation studies containing a large amount of details, which makes this process highly time-consuming for large-scale systems. To circumvent this issue, a nonlinear second-order model is developed to capture the essential effects of the synchronization process of grid-tied converters during faults. Due to this low-order model, the stability assessment can be approached using phase-plane analysis with a low computational burden - more than 4000 times faster than the full-order switching model. The simplified model is verified against a detailed switching model and laboratory setup of the entire converter system indicating a high accuracy (>96%). Accordingly, the simplified reduced-order model can be used for accurate transient stability studies when a low availability of computational power is present, if large-scale systems are considered, or for detailed uncertainty and sensitivity analysis.

    AB - Renewable energy sources interfaced with the grid through power-electronic converters may lose stability and capability to perform as desired when exposed to severe grid faults. As a result of this, transient stability analysis and assessment are particularly important for power system studies. Usually, synchronization stability and transient stability analysis are performed by simulation studies containing a large amount of details, which makes this process highly time-consuming for large-scale systems. To circumvent this issue, a nonlinear second-order model is developed to capture the essential effects of the synchronization process of grid-tied converters during faults. Due to this low-order model, the stability assessment can be approached using phase-plane analysis with a low computational burden - more than 4000 times faster than the full-order switching model. The simplified model is verified against a detailed switching model and laboratory setup of the entire converter system indicating a high accuracy (>96%). Accordingly, the simplified reduced-order model can be used for accurate transient stability studies when a low availability of computational power is present, if large-scale systems are considered, or for detailed uncertainty and sensitivity analysis.

    KW - Grid fault

    KW - Transient Stability

    KW - Reduced-order model

    KW - Grid-connected converters

    M3 - Article in proceeding

    BT - Proceedings of 2019 IEEE COMPEL

    PB - IEEE Press

    ER -