Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 8, Pages 9200-9211Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3159730
Keywords
Grid forming converter; microgrid; model-free predictive control (MF-PC); model-predictive control (MPC); voltage-source converter (VSC)
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Funding
- Agencia Nacional de Investigacion yDesarrollo [FB0008, 1210208]
- Anillo Project [ACT192013]
- Solar Energy Research Center Chile [CONICYT/FONDAP/15110019]
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This article proposes a model-free predictive control scheme to regulate the output voltage of GFI without the knowledge of the physical model.
With the increasing penetration of distributed energy resources into islanded microgrids, a grid-forming inverter (GFI) has become the key element interfacing renewable energy sources. Usually, the GFI is employed with an output filter to minimize the harmonic content achieving high-quality output voltage regulation. To this end, model-predictive control (MPC) has been widely proposed to control the output voltage of GFI systems due to the high-quality performance, fast control response, and straightforward handling of constraints. However, an accurate model of the system is required for the conventional MPC to avoid a suboptimal performance under uncertainties. To overcome this known drawback, a novel model-free predictive control is proposed in this article. Consequently, the output voltage of an LC L-filtered GFI is regulated without the knowledge of the physical model.
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