Harmonic resonance assessment of multiple paralleled grid-connected inverters system

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Abstract

This paper presents an eigenvalue-based impedance stability analytical method of multiple paralleled grid-connected inverter system. Different from the conventional impedance-based stability criterion, this work first built the state-space model of paralleled grid-connected inverters. On the basis of this, a bridge between the state-space-based modelling and impedance-based stability criterion is presented. The proposed method is able to perform stability assessment locally at the connection points of the component. Meanwhile, the eigenvalue-based sensitivity analysis is adopted to identify the root causes of harmonic resonance, which thus combines the advanced merits of the two worlds, and enhances the analytical ability to perform a harmonic resonance assessment. Simulations and experimental results are provided to demonstrate the effectiveness of the proposed method.
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This paper presents an eigenvalue-based impedance stability analytical method of multiple paralleled grid-connected inverter system. Different from the conventional impedance-based stability criterion, this work first built the state-space model of paralleled grid-connected inverters. On the basis of this, a bridge between the state-space-based modelling and impedance-based stability criterion is presented. The proposed method is able to perform stability assessment locally at the connection points of the component. Meanwhile, the eigenvalue-based sensitivity analysis is adopted to identify the root causes of harmonic resonance, which thus combines the advanced merits of the two worlds, and enhances the analytical ability to perform a harmonic resonance assessment. Simulations and experimental results are provided to demonstrate the effectiveness of the proposed method.
Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)
Number of pages6
PublisherIEEE Press
Publication dateJun 2017
Pages2070-2075
ISBN (Print)978-1-5090-5157-1
DOI
StatePublished - Jun 2017
Publication categoryResearch
Peer-reviewedYes
Event2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) - Kaohsiung, Taiwan, Province of China
Duration: 3 Jun 20177 Jun 2017

Conference

Conference2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)
LandTaiwan, Province of China
ByKaohsiung
Periode03/06/201707/06/2017

    Research areas

  • Inverters, Impedance, Power system stability, Stability criteria, State-space methods, Eigenvalues and eigenfunctions

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