Distributed Small-Signal Stability Conditions for Inverter-Based Unbalanced Microgrids

Nandanoori, Sai Pushpak; Kundu, Soumya; Du, Wei; Tuffner, Frank K.; Schneider, Kevin P.

doi:10.1109/tpwrs.2020.2982795

Title: Distributed Small-Signal Stability Conditions for Inverter-Based Unbalanced Microgrids

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Abstract

The proliferation of inverter-based generation and advanced sensing, controls, and communication infrastructure have facilitated accelerated deployment of microgrids. A coordinated network of microgrids can maintain reliable power delivery to critical facilities during extreme events. Low-inertia offered by the power-electronics–interfaced energy resources, however, can present significant challenges to ensuring stable operation of the microgrids. In this work, distributed small-signal stability conditions for inverter-based microgrids are developed that involve the droop-controller parameters and the network parameters (e.g. line impedances, loads). The distributed closed-form parametric stability conditions derived in this paper can be verified in a computationally efficient manner, facilitating reliable design and operations of networks of microgrids. Dynamic phasor models have been used to capture the effects of electromagnetic transients. Furthermore, numerical results are presented, along with PSCAD simulations, to validate the analytical stability conditions. Effects of design choices, such as the conductor types, and inverter sizes, on the small-signal stability of inverter-based microgrids are investigated to derive useful engineering insights.

Authors:

^[1];

^[1]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Publication Date:: 2020-03-30

Research Org.:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1668283

Report Number(s):: PNNL-SA-146963
Journal ID: ISSN 0885-8950

Grant/Contract Number:: AC05-76RL01830

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Power Systems

Additional Journal Information:: Journal Volume: 35; Journal Issue: 5; Journal ID: ISSN 0885-8950

Publisher:: IEEE

Country of Publication:: United States

Language:: English

Subject:: 24 POWER TRANSMISSION AND DISTRIBUTION; droop control; inverter-based microgrid; networked microgrid; small-signal stability

Citation Formats


                    Nandanoori, Sai Pushpak, Kundu, Soumya, Du, Wei, Tuffner, Frank K., and Schneider, Kevin P. Distributed Small-Signal Stability Conditions for Inverter-Based Unbalanced Microgrids.  United States: N. p., 2020. 
Web.  doi:10.1109/tpwrs.2020.2982795.

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                    Nandanoori, Sai Pushpak, Kundu, Soumya, Du, Wei, Tuffner, Frank K., & Schneider, Kevin P. Distributed Small-Signal Stability Conditions for Inverter-Based Unbalanced Microgrids.  United States.  https://doi.org/10.1109/tpwrs.2020.2982795

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                    Nandanoori, Sai Pushpak, Kundu, Soumya, Du, Wei, Tuffner, Frank K., and Schneider, Kevin P. Mon .  
"Distributed Small-Signal Stability Conditions for Inverter-Based Unbalanced Microgrids".  United States.  https://doi.org/10.1109/tpwrs.2020.2982795.  https://www.osti.gov/servlets/purl/1668283.

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@article{osti_1668283,

  title        = {Distributed Small-Signal Stability Conditions for Inverter-Based Unbalanced Microgrids},

  author       = {Nandanoori, Sai Pushpak and Kundu, Soumya and Du, Wei and Tuffner, Frank K. and Schneider, Kevin P.},

  abstractNote = {The proliferation of inverter-based generation and advanced sensing, controls, and communication infrastructure have facilitated accelerated deployment of microgrids. A coordinated network of microgrids can maintain reliable power delivery to critical facilities during extreme events. Low-inertia offered by the power-electronics–interfaced energy resources, however, can present significant challenges to ensuring stable operation of the microgrids. In this work, distributed small-signal stability conditions for inverter-based microgrids are developed that involve the droop-controller parameters and the network parameters (e.g. line impedances, loads). The distributed closed-form parametric stability conditions derived in this paper can be verified in a computationally efficient manner, facilitating reliable design and operations of networks of microgrids. Dynamic phasor models have been used to capture the effects of electromagnetic transients. Furthermore, numerical results are presented, along with PSCAD simulations, to validate the analytical stability conditions. Effects of design choices, such as the conductor types, and inverter sizes, on the small-signal stability of inverter-based microgrids are investigated to derive useful engineering insights.},

  doi          = {10.1109/tpwrs.2020.2982795},

  journal      = {IEEE Transactions on Power Systems},

  number       = 5,

  volume       = 35,

  place        = {United States},

  year         = {2020},

  month        = {3}

}

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