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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Autores principales:	Zbigniew Rymarski, Krzysztof Bernacki, Łukasz Dyga
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	impedance network Z-source quasi-Z-source voltage source inverter voltage distortions Technology T
Acceso en línea:	https://doaj.org/article/69d8162d42924c998af794f8fae39fd8
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id	oai:doaj.org-article:69d8162d42924c998af794f8fae39fd8
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spelling	oai:doaj.org-article:69d8162d42924c998af794f8fae39fd82021-11-11T16:01:27ZControlled Energy Flow in Z-Source Inverters10.3390/en142172721996-1073https://doaj.org/article/69d8162d42924c998af794f8fae39fd82021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7272https://doaj.org/toc/1996-1073This 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.Zbigniew RymarskiKrzysztof BernackiŁukasz DygaMDPI AGarticleimpedance networkZ-sourcequasi-Z-sourcevoltage source invertervoltage distortionsTechnologyTENEnergies, Vol 14, Iss 7272, p 7272 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	impedance network Z-source quasi-Z-source voltage source inverter voltage distortions Technology T
spellingShingle	impedance network Z-source quasi-Z-source voltage source inverter voltage distortions Technology T Zbigniew Rymarski Krzysztof Bernacki Łukasz Dyga Controlled Energy Flow in Z-Source Inverters
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.
format	article
author	Zbigniew Rymarski Krzysztof Bernacki Łukasz Dyga
author_facet	Zbigniew Rymarski Krzysztof Bernacki Łukasz Dyga
author_sort	Zbigniew Rymarski
title	Controlled Energy Flow in Z-Source Inverters
title_short	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_sort	controlled energy flow in z-source inverters
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/69d8162d42924c998af794f8fae39fd8
work_keys_str_mv	AT zbigniewrymarski controlledenergyflowinzsourceinverters AT krzysztofbernacki controlledenergyflowinzsourceinverters AT łukaszdyga controlledenergyflowinzsourceinverters
_version_	1718432418980954112

Controlled Energy Flow in Z-Source Inverters

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