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Model-Free Predictive Control of Grid-Forming Inverters With $LCL$ Filters

2022; Institute of Electrical and Electronics Engineers; Volume: 37; Issue: 8 Linguagem: Inglês

10.1109/tpel.2022.3159730

1941-0107

Rasool Heydari, Héctor Young, Freddy Flores‐Bahamonde, Sadegh Vaez‐Zadeh, Catalina González‐Castaño, Sanaz Sabzevari, José Rodríguez,

Advanced DC-DC Converters

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 $LCL$ -filtered GFI is regulated without the knowledge of the physical model.