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Increasing Efficiency of Energy Conversion Systems from Renewable Sources Using Voltage Source Inverters with Soft Switching of Transistors

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  • Witold Mazgaj

    (Department of Electrical Engineering, Cracow University of Technology, Warszawska 24 St., 31-155 Cracow, Poland)

  • Zbigniew Szular

    (Department of Electrical Engineering, Cracow University of Technology, Warszawska 24 St., 31-155 Cracow, Poland)

Abstract

This article presents proposals to increase the efficiencies of energy conversion systems from renewable sources using a soft-switching technique in three-phase voltage source inverters. The first part of this article briefly presents basic systems for generating energy from renewable sources. Special attention is paid to both photovoltaic and wind power plants. The next section describes the voltage source inverter with the soft-switching system of transistors, which is resistant to disturbances in the control systems of inverters. Laboratory tests on cooperation between the voltage source inverter and the AC grid are carried out for two cases, when energy is transmitted from the DC circuit to the AC grid and vice versa. In the final part, the efficiencies of energy conversion systems operating under the voltage source inverter with the soft-switching technique are compared with those of an inverter using hard switching of transistors. A comparison is made for energy conversion systems with a rated power of 100 kW and 1 MW.

Suggested Citation

  • Witold Mazgaj & Zbigniew Szular, 2025. "Increasing Efficiency of Energy Conversion Systems from Renewable Sources Using Voltage Source Inverters with Soft Switching of Transistors," Energies, MDPI, vol. 18(13), pages 1-27, July.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:13:p:3474-:d:1692523
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    References listed on IDEAS

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    1. Hooman Ghaffarzadeh & Ali Mehrizi-Sani, 2020. "Review of Control Techniques for Wind Energy Systems," Energies, MDPI, vol. 13(24), pages 1-19, December.
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