Dynamic Load Inrush Current Mitigation in Islanded Microgrids Powered by Grid-Forming Inverters

Gursoy, Mehmetcan; Mirafzal, Behrooz

doi:10.1109/icidea53933.2022.9970083

Dynamic Load Inrush Current Mitigation in Islanded Microgrids Powered by Grid-Forming Inverters

Conference · 15 October 2022 · 2022 1st IEEE International Conference on Industrial Electronics: Developments & Applications (ICIDeA)

DOI:https://doi.org/10.1109/icidea53933.2022.9970083· OSTI ID:1905849

Gursoy, Mehmetcan ^[1]; Mirafzal, Behrooz ^[1]

Kansas State University,Department of Electrical and Computer Engineering,Manhattan,KS,USA

Grid-forming inverters in a microgrid may trip due to high inrush current caused by a switched connection of an inductive load, e.g., a relatively large induction motor. The control scheme presented in this article includes virtual inertia control method superimposed on the cascaded controller. This article studies the impact of cascaded control scheme used for grid-forming inverter to mitigate the inrush current effects and enhance the inverter’s robustness for the safe connection of inductive and dynamic loads. Experimental tests are performed using the virtual inertia method for generating the reference angle for synchronous frame conversion. The experimental performance and sensitivity of the controller to different controller gain settings for a switched connection of an induction motor are discussed. The cascaded operation significantly mitigates the inrush currents while the inverters can perform a normal operation. The performance of the control method is tested in a laboratory-scale hardware setup of a 208V microgrid fed by 5kVA and 10kVA inverters, and the results are presented.

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Research Organization:: Kansas State Univ., Manhattan, KS (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

DOE Contract Number:: EE0008767

OSTI ID:: 1905849

Report Number(s):: DOE-KSU-8767

Journal Information:: 2022 1st IEEE International Conference on Industrial Electronics: Developments & Applications (ICIDeA), Conference: 2022 1st IEEE International Conference on Industrial Electronics: Developments & Applications (ICIDeA) Bhubaneswar, India 15-16 October 2022

Country of Publication:: United States

Language:: English

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