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A sigmoid-based adaptive inertia control strategy for grid-forming inverter to enhance frequency stability
- Source :
- Frontiers in Energy Research, Vol 11 (2023)
- Publication Year :
- 2023
- Publisher :
- Frontiers Media S.A., 2023.
-
Abstract
- Introduction: This paper proposes a sigmoid-based adaptive inertia control strategy for grid-forming (GFM) inverter to enhance frequency stability.Methods: Firstly, the frequency response characteristics under different disturbances are analyzed theoretically. Then, to solve the problem that fixed inertia leads to a contradiction between the maximum frequency deviation and the setting time, a non-linear inertia regulator is investigated. This non-linear inertia regulator, which is based on an improved sigmoid function, is applied to achieve real-time inertia by the frequency deviation. Moreover, the full-order small-signal model of the system containing the nonlinear inertia regulator is established and thus the stability of the proposed strategy is analyzed.Result and Discussion: The proposed control strategy is implemented without derivative action, which may suffer from high-frequency noises. Finally, the hardware-inthe-loop (HIL) results verify the remarkable performance of the proposed control strategy.
Details
- Language :
- English
- ISSN :
- 2296598X
- Volume :
- 11
- Database :
- Directory of Open Access Journals
- Journal :
- Frontiers in Energy Research
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.252961996685441ca591613149f49c28
- Document Type :
- article
- Full Text :
- https://doi.org/10.3389/fenrg.2023.1095610