Grid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection

To improve both the stability and the disturbance suppression ability of single-phase grid-connected inverters through LCL filters, this paper proposes an inverter output impedance enhancing control mechanism. The impedance enhancing control mechanism employs a virtual impedance control and a node-v...

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Autores principales:	Zhiwei Bian, Yuqi Peng, Yuanbin He, Lijun Hang, Xiaogao Xie, Henry Shu-Hung Chung
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Inverters stability passivity impedance enhancement Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/e15887deea9f48f2a16ebaf01f02357a
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spelling	oai:doaj.org-article:e15887deea9f48f2a16ebaf01f02357a2021-11-26T00:00:16ZGrid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection2169-353610.1109/ACCESS.2021.3106332https://doaj.org/article/e15887deea9f48f2a16ebaf01f02357a2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9519695/https://doaj.org/toc/2169-3536To improve both the stability and the disturbance suppression ability of single-phase grid-connected inverters through LCL filters, this paper proposes an inverter output impedance enhancing control mechanism. The impedance enhancing control mechanism employs a virtual impedance control and a node-voltage feedforward control to ensure sufficient passivity and high amplitude of inverter output impedance over wide frequency range of interest. The proposed control mechanism is realized through combination control of a low-voltage bidirectional voltage-source-converter (B-VSC) connected at the filter capacitor branch and the main inverter. The B-VSC sustains an extra low power without sacrificing the efficiency of the inverter. Both the simulation and experimental results are finally given to verify the validity of the proposed method, which shows the performance improvement of the proposed radial-line inverter system working under variable grid conditions.Zhiwei BianYuqi PengYuanbin HeLijun HangXiaogao XieHenry Shu-Hung ChungIEEEarticleInvertersstabilitypassivityimpedance enhancementElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 118334-118345 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Inverters stability passivity impedance enhancement Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Inverters stability passivity impedance enhancement Electrical engineering. Electronics. Nuclear engineering TK1-9971 Zhiwei Bian Yuqi Peng Yuanbin He Lijun Hang Xiaogao Xie Henry Shu-Hung Chung Grid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection
description	To improve both the stability and the disturbance suppression ability of single-phase grid-connected inverters through LCL filters, this paper proposes an inverter output impedance enhancing control mechanism. The impedance enhancing control mechanism employs a virtual impedance control and a node-voltage feedforward control to ensure sufficient passivity and high amplitude of inverter output impedance over wide frequency range of interest. The proposed control mechanism is realized through combination control of a low-voltage bidirectional voltage-source-converter (B-VSC) connected at the filter capacitor branch and the main inverter. The B-VSC sustains an extra low power without sacrificing the efficiency of the inverter. Both the simulation and experimental results are finally given to verify the validity of the proposed method, which shows the performance improvement of the proposed radial-line inverter system working under variable grid conditions.
format	article
author	Zhiwei Bian Yuqi Peng Yuanbin He Lijun Hang Xiaogao Xie Henry Shu-Hung Chung
author_facet	Zhiwei Bian Yuqi Peng Yuanbin He Lijun Hang Xiaogao Xie Henry Shu-Hung Chung
author_sort	Zhiwei Bian
title	Grid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection
title_short	Grid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection
title_full	Grid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection
title_fullStr	Grid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection
title_full_unstemmed	Grid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection
title_sort	grid-connected inverter output impedance reshaping for passivity enhancement and disturbance rejection
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/e15887deea9f48f2a16ebaf01f02357a
work_keys_str_mv	AT zhiweibian gridconnectedinverteroutputimpedancereshapingforpassivityenhancementanddisturbancerejection AT yuqipeng gridconnectedinverteroutputimpedancereshapingforpassivityenhancementanddisturbancerejection AT yuanbinhe gridconnectedinverteroutputimpedancereshapingforpassivityenhancementanddisturbancerejection AT lijunhang gridconnectedinverteroutputimpedancereshapingforpassivityenhancementanddisturbancerejection AT xiaogaoxie gridconnectedinverteroutputimpedancereshapingforpassivityenhancementanddisturbancerejection AT henryshuhungchung gridconnectedinverteroutputimpedancereshapingforpassivityenhancementanddisturbancerejection
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Grid-Connected Inverter Output Impedance Reshaping for Passivity Enhancement and Disturbance Rejection

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