On Control Schemes for Grid-Forming Inverters

Sadeque, Fahmid; Fateh, Fariba

doi:10.1109/kpec54747.2022.9814774

On Control Schemes for Grid-Forming Inverters

Conference · Mon Apr 25 00:00:00 EDT 2022 · 2022 IEEE Kansas Power and Energy Conference (KPEC)

DOI:https://doi.org/10.1109/kpec54747.2022.9814774· OSTI ID:1905752

Sadeque, Fahmid ^[1]; Fateh, Fariba ^[2]

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

Grid-forming inverters can collaboratively regulate the voltage and frequency of a microgrid. These inverters are expected to be seen more in the future microgrid, undertaking the roles of the conventional power generators. Like conventional power generators, they must balance supply and demand, contribute to power-sharing between inverters and other power generators, and restore the voltage and frequency after any power changes. These technical challenges are typically achieved through different primary and secondary controllers. This article reviews some state-of-the-art primary and secondary control schemes for the emerging technology of grid-forming inverters. First, the typical control schemes for grid-following inverters are briefly presented for the continuity of the discussion on the roles of the grid-forming inverters in future power-grid, followed by two basic control schemes for the grid-forming inverters. Then, two decentralized power-sharing techniques, i.e., droop, and virtual inertia, are analyzed. The technical challenges for inverter synchronization and some control methods are discussed afterward. Finally, several secondary control methods for the voltage and frequency restoration in grid-forming inverters are reviewed.

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Research Organization:: Kansas State University

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

DOE Contract Number:: EE0008767

OSTI ID:: 1905752

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

Journal Information:: 2022 IEEE Kansas Power and Energy Conference (KPEC), Journal Name: 2022 IEEE Kansas Power and Energy Conference (KPEC)

Country of Publication:: United States

Language:: English

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