Controlled Energy Flow in Z-Source Inverters
This paper proposes a method to reduce the output voltage distortions in voltage source inverters (VSI) working with impedance networks. The three main reasons for the voltage distortions include a discontinuous current in the coils of the impedance network, the double output frequency harmonics in...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/21/7272 |
| _version_ | 1797410958842265600 |
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| author | Zbigniew Rymarski Krzysztof Bernacki Łukasz Dyga |
| author_facet | Zbigniew Rymarski Krzysztof Bernacki Łukasz Dyga |
| author_sort | Zbigniew Rymarski |
| collection | DOAJ |
| description | This paper proposes a method to reduce the output voltage distortions in voltage source inverters (VSI) working with impedance networks. The three main reasons for the voltage distortions include a discontinuous current in the coils of the impedance network, the double output frequency harmonics in the VSI’s voltage output caused by insufficient capacitance in the impedance network, and voltage drops on the bridge switches during the shoot-through time. The first of these distortions can be reduced by increasing the current of the impedance network when the output VSI current is low. This method requires storing energy in the battery connected to the DC link of the VSI during the “non-shoot through” time. Furthermore, this solution can also be used when the Z-source inverter works with a photovoltaic cell to help it attain a maximum power point. The Z-source inverter is essentially a voltage source inverter with the Z-source in the input. In this paper, the theory behind basic impedance networks of Z-source and quasi-Z-source (qZ-source) is investigated where simulations of the presented solutions and experimental verification of the results are also presented. |
| first_indexed | 2024-03-09T04:38:04Z |
| format | Article |
| id | doaj.art-69d8162d42924c998af794f8fae39fd8 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T04:38:04Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-69d8162d42924c998af794f8fae39fd82023-12-03T13:25:41ZengMDPI AGEnergies1996-10732021-11-011421727210.3390/en14217272Controlled Energy Flow in Z-Source InvertersZbigniew Rymarski0Krzysztof Bernacki1Łukasz Dyga2Department of Electronics, Electrical Engineering and Microelectronics, Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, PolandDepartment of Electronics, Electrical Engineering and Microelectronics, Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, PolandDepartment of Electronics, Electrical Engineering and Microelectronics, Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, PolandThis paper proposes a method to reduce the output voltage distortions in voltage source inverters (VSI) working with impedance networks. The three main reasons for the voltage distortions include a discontinuous current in the coils of the impedance network, the double output frequency harmonics in the VSI’s voltage output caused by insufficient capacitance in the impedance network, and voltage drops on the bridge switches during the shoot-through time. The first of these distortions can be reduced by increasing the current of the impedance network when the output VSI current is low. This method requires storing energy in the battery connected to the DC link of the VSI during the “non-shoot through” time. Furthermore, this solution can also be used when the Z-source inverter works with a photovoltaic cell to help it attain a maximum power point. The Z-source inverter is essentially a voltage source inverter with the Z-source in the input. In this paper, the theory behind basic impedance networks of Z-source and quasi-Z-source (qZ-source) is investigated where simulations of the presented solutions and experimental verification of the results are also presented.https://www.mdpi.com/1996-1073/14/21/7272impedance networkZ-sourcequasi-Z-sourcevoltage source invertervoltage distortions |
| spellingShingle | Zbigniew Rymarski Krzysztof Bernacki Łukasz Dyga Controlled Energy Flow in Z-Source Inverters Energies impedance network Z-source quasi-Z-source voltage source inverter voltage distortions |
| title | Controlled Energy Flow in Z-Source Inverters |
| title_full | Controlled Energy Flow in Z-Source Inverters |
| title_fullStr | Controlled Energy Flow in Z-Source Inverters |
| title_full_unstemmed | Controlled Energy Flow in Z-Source Inverters |
| title_short | Controlled Energy Flow in Z-Source Inverters |
| title_sort | controlled energy flow in z source inverters |
| topic | impedance network Z-source quasi-Z-source voltage source inverter voltage distortions |
| url | https://www.mdpi.com/1996-1073/14/21/7272 |
| work_keys_str_mv | AT zbigniewrymarski controlledenergyflowinzsourceinverters AT krzysztofbernacki controlledenergyflowinzsourceinverters AT łukaszdyga controlledenergyflowinzsourceinverters |