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Transient Behavior Analysis of Microgrids in Grid-Connected and Islanded Modes: A Comparative Study of LVRT and HVRT Capabilities

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  • Abrar Shahriar Pramanik

    (Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI 96822, USA)

  • Saeed Sepasi

    (Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI 96822, USA)

Abstract

Microgrids, with integrated PV systems and nonlinear loads, have grown significantly in popularity in recent years, making the evaluation of their transient behaviors in grid-connected and islanded operations paramount. This study examines a microgrid’s low-voltage ride-through (LVRT) and high-voltage ride-through (HVRT) capabilities in these operational scenarios. The microgrid’s behavior was analyzed using both electromagnetic transient (EMT) and RMS simulation methods. Two operational modes, grid-connected and islanded, were considered. A three-phase diesel generator acted as a reference machine in islanded mode. Findings highlighted distinct behaviors in the two operational modes. The EMT simulation revealed in-depth characteristics of electrical parameters, showing high-frequency oscillations more precisely than the RMS simulation. Additionally, the transient recovery times were longer in islanded mode compared to grid-connected mode. The EMT simulation offers a more detailed portrayal of transient behaviors than the RMS simulation, especially in capturing high-frequency disturbances. However, its completion time becomes significantly extended with longer simulation durations. Microgrids showcase distinct transient behaviors in grid-connected versus islanded modes, especially in LVRT and HVRT scenarios. These findings are critical for the design and operation of modern microgrids.

Suggested Citation

  • Abrar Shahriar Pramanik & Saeed Sepasi, 2023. "Transient Behavior Analysis of Microgrids in Grid-Connected and Islanded Modes: A Comparative Study of LVRT and HVRT Capabilities," Clean Technol., MDPI, vol. 5(4), pages 1-17, November.
    • Handle: RePEc:gam:jcltec:v:5:y:2023:i:4:p:65-1303:d:1277631
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    References listed on IDEAS

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    1. Quynh T. Tran & Kevin Davies & Saeed Sepasi, 2021. "Isolation Microgrid Design for Remote Areas with the Integration of Renewable Energy: A Case Study of Con Dao Island in Vietnam," Clean Technol., MDPI, vol. 3(4), pages 1-17, November.
    2. Sepasi, Saeed & Toledo, Silas & Kobayashi, Jonathan & Roose, Leon R. & Matsuura, Marc M. & Tran, Quynh T., 2023. "A practical solution for excess energy management in a diesel-backed microgrid with high renewable penetration," Renewable Energy, Elsevier, vol. 202(C), pages 581-588.
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