A Novel Model-Free Predictive Control for T-Type Three-Level Grid-Tied Inverters

Autor:	Zheng Yin, Cungang Hu, Kui Luo, Tao Rui, Zhuangzhuang Feng, Geye Lu, Pinjia Zhang
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	model-free predictive control T-type three-level inverter current gradient stagnation effect sector judgment Technology
Zdroj:	Energies, Vol 15, Iss 18, p 6557 (2022)
Druh dokumentu:	article
ISSN:	1996-1073
DOI:	10.3390/en15186557
Popis:	The model-free predictive control (MFPC) scheme is an effective scheme to enhance the parameter robustness of model predictive control. However, the MFPC scheme can be affected by the current gradient updating frequency. This paper proposes an improved MFPC scheme for a T-type three-level inverter. First, a novel current gradient updating method is designed to estimate all current gradients per control period, which uses the current gradient relationship between different voltage vectors and eliminates the effect of current gradients updating stagnation. Moreover, a sector judgment method based on the current gradient is proposed. Redundant small vectors are accurately judged and the computational burden is greatly reduced. Finally, simulation and experimental comparisons on a T-type three-level inverter verify the effectiveness of the proposed MFPC scheme.
Databáze:	Directory of Open Access Journals
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