Advanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs

The parallel connection of multiple distributed energy resources with a common DC-link structure is typically used in grid-connected applications which enables flexible operation maximizing power production of the inverter system under various operation conditions. However, it has brought drawbacks...

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Autores principales:	Guanhong Song, Bo Cao, Liuchen Chang, Riming Shao
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	DC-AC power converters observers nonlinear control systems feedforward systems Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/bca97c1e458345feb22213ca41426148
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id	oai:doaj.org-article:bca97c1e458345feb22213ca41426148
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spelling	oai:doaj.org-article:bca97c1e458345feb22213ca414261482021-11-18T00:04:37ZAdvanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs2169-353610.1109/ACCESS.2021.3124614https://doaj.org/article/bca97c1e458345feb22213ca414261482021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9597512/https://doaj.org/toc/2169-3536The parallel connection of multiple distributed energy resources with a common DC-link structure is typically used in grid-connected applications which enables flexible operation maximizing power production of the inverter system under various operation conditions. However, it has brought drawbacks for DC-link power decoupling with the requirement of a larger capacitor bank, faster voltage regulation, etc., to maintain a constant DC-link voltage which increases the overall size and cost. In this paper, a DC-link decoupling technique using a nonlinear control algorithm is proposed to perform rapid DC-link voltage regulation for multi-input grid-connected inverters. With the implementation of a nonlinear observer, the power fed into the DC-link from multiple inputs is estimated by the proposed control algorithm and can be rapidly compensated by the inverter minimizing the DC-link voltage fluctuation. The effectiveness of the proposed nonlinear power decoupling control algorithm is verified by comparing the DC-link performance with a conventional control algorithm through both simulation results on a MATLAB platform and experimental verification on a grid-connected inverter prototype.Guanhong SongBo CaoLiuchen ChangRiming ShaoIEEEarticleDC-AC power convertersobserversnonlinear control systemsfeedforward systemsElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 148409-148420 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	DC-AC power converters observers nonlinear control systems feedforward systems Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	DC-AC power converters observers nonlinear control systems feedforward systems Electrical engineering. Electronics. Nuclear engineering TK1-9971 Guanhong Song Bo Cao Liuchen Chang Riming Shao Advanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs
description	The parallel connection of multiple distributed energy resources with a common DC-link structure is typically used in grid-connected applications which enables flexible operation maximizing power production of the inverter system under various operation conditions. However, it has brought drawbacks for DC-link power decoupling with the requirement of a larger capacitor bank, faster voltage regulation, etc., to maintain a constant DC-link voltage which increases the overall size and cost. In this paper, a DC-link decoupling technique using a nonlinear control algorithm is proposed to perform rapid DC-link voltage regulation for multi-input grid-connected inverters. With the implementation of a nonlinear observer, the power fed into the DC-link from multiple inputs is estimated by the proposed control algorithm and can be rapidly compensated by the inverter minimizing the DC-link voltage fluctuation. The effectiveness of the proposed nonlinear power decoupling control algorithm is verified by comparing the DC-link performance with a conventional control algorithm through both simulation results on a MATLAB platform and experimental verification on a grid-connected inverter prototype.
format	article
author	Guanhong Song Bo Cao Liuchen Chang Riming Shao
author_facet	Guanhong Song Bo Cao Liuchen Chang Riming Shao
author_sort	Guanhong Song
title	Advanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs
title_short	Advanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs
title_full	Advanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs
title_fullStr	Advanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs
title_full_unstemmed	Advanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs
title_sort	advanced decoupling techniques for grid-connected inverters with multiple inputs
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/bca97c1e458345feb22213ca41426148
work_keys_str_mv	AT guanhongsong advanceddecouplingtechniquesforgridconnectedinverterswithmultipleinputs AT bocao advanceddecouplingtechniquesforgridconnectedinverterswithmultipleinputs AT liuchenchang advanceddecouplingtechniquesforgridconnectedinverterswithmultipleinputs AT rimingshao advanceddecouplingtechniquesforgridconnectedinverterswithmultipleinputs
_version_	1718425248820363264

Advanced Decoupling Techniques for Grid-Connected Inverters With Multiple Inputs

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