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Article

Proportional-Resonant Controller Structure with Finite Gain for Three-Phase Grid-Tied Converters

by
Marek Nowak
1,*,
Tomasz Binkowski
1 and
Stanisław Piróg
2
1
Faculty of Electrical and Computer Engineering, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
2
Department of Power Electronics and Energy Control Systems, Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland
*
Author to whom correspondence should be addressed.
Energies 2021, 14(20), 6726; https://doi.org/10.3390/en14206726
Submission received: 30 August 2021 / Revised: 28 September 2021 / Accepted: 12 October 2021 / Published: 15 October 2021
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Abstract

The paper presents the study of a three-phase system coupling a DC power source to a power grid. This study, based on an FPGA, implements a real-time control system and digital models of the power circuit. The proposed proportional–resonant (P+R) controller with a modified structure was part of the system, which can be used as an alternative controller to traditional ones, e.g., in photovoltaic systems. Due to difficulties in implementing resonant controllers, a P+R with a new structure using a PI controller was elaborated. With an appropriate approach to the generation of phase current patterns, it is possible to set the reactive current and, thus, compensate for the reactive power. The operation of the system for typical operating conditions (e.g., system startup, change in preset load) was characterized and compared with a classical solution using a PI controller.
Keywords: inverter; energy source; proportional–resonant; controller; FPGA inverter; energy source; proportional–resonant; controller; FPGA
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MDPI and ACS Style

Nowak, M.; Binkowski, T.; Piróg, S. Proportional-Resonant Controller Structure with Finite Gain for Three-Phase Grid-Tied Converters. Energies 2021, 14, 6726. https://doi.org/10.3390/en14206726

AMA Style

Nowak M, Binkowski T, Piróg S. Proportional-Resonant Controller Structure with Finite Gain for Three-Phase Grid-Tied Converters. Energies. 2021; 14(20):6726. https://doi.org/10.3390/en14206726

Chicago/Turabian Style

Nowak, Marek, Tomasz Binkowski, and Stanisław Piróg. 2021. "Proportional-Resonant Controller Structure with Finite Gain for Three-Phase Grid-Tied Converters" Energies 14, no. 20: 6726. https://doi.org/10.3390/en14206726

APA Style

Nowak, M., Binkowski, T., & Piróg, S. (2021). Proportional-Resonant Controller Structure with Finite Gain for Three-Phase Grid-Tied Converters. Energies, 14(20), 6726. https://doi.org/10.3390/en14206726

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