State-space-based harmonic stability analysis for paralleled grid-connected inverters

Yanbo Wang; Xiongfei Wang; Zhe Chen; Frede Blaabjerg

doi:10.1109/IECON.2016.7793290

State-space-based harmonic stability analysis for paralleled grid-connected inverters

Yanbo Wang, Xiongfei Wang, Zhe Chen, Frede Blaabjerg

AAU Energy

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

14 Citations (Scopus)

Abstract

This paper addresses a state-space-based harmonic stability analysis of paralleled grid-connected inverters system. A small signal model of individual inverter is developed, where LCL filter, the equivalent delay of control system, and current controller are modeled. Then, the overall small signal model of paralleled grid-connected inverters is built. Finally, the state space-based stability analysis approach is developed to explain the harmonic resonance phenomenon. The eigenvalue traces associated with time delay and coupled grid impedance are obtained, which accounts for how the unstable inverter produces the harmonic resonance and leads to the instability of whole paralleled system. The proposed approach reveals the contributions of the grid impedance as well as the coupled effect on other grid-connected inverters under different grid conditions. Simulation and experimental results are provided to verify the proposed harmonic stability assessment method.

Original language	English
Title of host publication	Proceeding of the 42nd Annual Conference of the IEEE Industrial Electronics Society, IECON 2016
Number of pages	6
Publisher	IEEE Press
Publication date	Oct 2016
Pages	7040 - 7045
ISBN (Electronic)	978-1-5090-3474-1
DOIs	https://doi.org/10.1109/IECON.2016.7793290
Publication status	Published - Oct 2016
Event	42nd Conference of the Industrial Electronics Society, IECON 2016: 42nd Annual Conference of the IEEE Industrial Electronics Society - Palazzo dei Congressi, Florence, Italy Duration: 24 Oct 2016 → 27 Oct 2016 http://www.iecon2016.org/?jjj=1471434927195 http://www.iecon2016.org/

Conference

Conference	42nd Conference of the Industrial Electronics Society, IECON 2016
Location	Palazzo dei Congressi
Country/Territory	Italy
City	Florence
Period	24/10/2016 → 27/10/2016
Sponsor	IEEE Industrial Electronics Society (IES), Institute of Electrical and Electronics Engineers (IEEE)
Internet address	http://www.iecon2016.org/?jjj=1471434927195 http://www.iecon2016.org/

Keywords

State-space
Harmonis Stability
Paralleled Grid-connected Inverters
Grid Impedance
Time Delay

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10.1109/IECON.2016.7793290

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@inproceedings{18fdfd7f0cc24a0d86769f37c551ba53,

title = "State-space-based harmonic stability analysis for paralleled grid-connected inverters",

abstract = "This paper addresses a state-space-based harmonic stability analysis of paralleled grid-connected inverters system. A small signal model of individual inverter is developed, where LCL filter, the equivalent delay of control system, and current controller are modeled. Then, the overall small signal model of paralleled grid-connected inverters is built. Finally, the state space-based stability analysis approach is developed to explain the harmonic resonance phenomenon. The eigenvalue traces associated with time delay and coupled grid impedance are obtained, which accounts for how the unstable inverter produces the harmonic resonance and leads to the instability of whole paralleled system. The proposed approach reveals the contributions of the grid impedance as well as the coupled effect on other grid-connected inverters under different grid conditions. Simulation and experimental results are provided to verify the proposed harmonic stability assessment method.",

keywords = "State-space, Harmonis Stability, Paralleled Grid-connected Inverters, Grid Impedance, Time Delay",

author = "Yanbo Wang and Xiongfei Wang and Zhe Chen and Frede Blaabjerg",

year = "2016",

month = oct,

doi = "10.1109/IECON.2016.7793290",

language = "English",

pages = "7040 -- 7045",

booktitle = "Proceeding of the 42nd Annual Conference of the IEEE Industrial Electronics Society, IECON 2016",

publisher = "IEEE Press",

note = "42nd Conference of the Industrial Electronics Society, IECON 2016 : 42nd Annual Conference of the IEEE Industrial Electronics Society, IECON 2016 ; Conference date: 24-10-2016 Through 27-10-2016",

url = "http://www.iecon2016.org/?jjj=1471434927195, http://www.iecon2016.org/",

}

Wang, Y , Wang, X , Chen, Z & Blaabjerg, F 2016, State-space-based harmonic stability analysis for paralleled grid-connected inverters. in Proceeding of the 42nd Annual Conference of the IEEE Industrial Electronics Society, IECON 2016. IEEE Press, pp. 7040 - 7045, 42nd Conference of the Industrial Electronics Society, IECON 2016, Florence, Italy, 24/10/2016. https://doi.org/10.1109/IECON.2016.7793290

State-space-based harmonic stability analysis for paralleled grid-connected inverters. / Wang, Yanbo ; Wang, Xiongfei ; Chen, Zhe et al.
Proceeding of the 42nd Annual Conference of the IEEE Industrial Electronics Society, IECON 2016. IEEE Press, 2016. p. 7040 - 7045.

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

TY - GEN

T1 - State-space-based harmonic stability analysis for paralleled grid-connected inverters

AU - Wang, Yanbo

AU - Wang, Xiongfei

AU - Chen, Zhe

AU - Blaabjerg, Frede

PY - 2016/10

Y1 - 2016/10

N2 - This paper addresses a state-space-based harmonic stability analysis of paralleled grid-connected inverters system. A small signal model of individual inverter is developed, where LCL filter, the equivalent delay of control system, and current controller are modeled. Then, the overall small signal model of paralleled grid-connected inverters is built. Finally, the state space-based stability analysis approach is developed to explain the harmonic resonance phenomenon. The eigenvalue traces associated with time delay and coupled grid impedance are obtained, which accounts for how the unstable inverter produces the harmonic resonance and leads to the instability of whole paralleled system. The proposed approach reveals the contributions of the grid impedance as well as the coupled effect on other grid-connected inverters under different grid conditions. Simulation and experimental results are provided to verify the proposed harmonic stability assessment method.

AB - This paper addresses a state-space-based harmonic stability analysis of paralleled grid-connected inverters system. A small signal model of individual inverter is developed, where LCL filter, the equivalent delay of control system, and current controller are modeled. Then, the overall small signal model of paralleled grid-connected inverters is built. Finally, the state space-based stability analysis approach is developed to explain the harmonic resonance phenomenon. The eigenvalue traces associated with time delay and coupled grid impedance are obtained, which accounts for how the unstable inverter produces the harmonic resonance and leads to the instability of whole paralleled system. The proposed approach reveals the contributions of the grid impedance as well as the coupled effect on other grid-connected inverters under different grid conditions. Simulation and experimental results are provided to verify the proposed harmonic stability assessment method.

KW - State-space

KW - Harmonis Stability

KW - Paralleled Grid-connected Inverters

KW - Grid Impedance

KW - Time Delay

U2 - 10.1109/IECON.2016.7793290

DO - 10.1109/IECON.2016.7793290

M3 - Article in proceeding

SP - 7040

EP - 7045

BT - Proceeding of the 42nd Annual Conference of the IEEE Industrial Electronics Society, IECON 2016

PB - IEEE Press

T2 - 42nd Conference of the Industrial Electronics Society, IECON 2016

Y2 - 24 October 2016 through 27 October 2016

ER -

State-space-based harmonic stability analysis for paralleled grid-connected inverters

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