A Grey-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping

Weihua Zhou*, Yanbo Wang, Pei Cai, Zhe Chen

*Kontaktforfatter

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Resumé

Resonance phenomenon of grid-connected inverter may happen due to dynamic variation of grid impedance. Terminal output impedance of inverter can be reshaped by retuning internal parameters of inverter to mitigate resonance issue and stabilize grid-connected inverter system. However, it’s not easy to obtain internal parameters of grid-connected inverter in practical operation due to industrial secrecy. This paper presents a grey-box parameters identification method to extract the internal parameters of LCL filter, the proportional coefficient of current controller and capacitor-current feedback coefficient from the measured terminal impedance frequency responses by using vector fitting algorithm. When instability phenomenon of multiple-parallel inverters system occurs, the internal parameters of each inverter are first identified by using the proposed method. Then, the capacitor-current-feedback coefficients are re-tuned to stabilize the studied power system according to the impedance-based stability criterion. The re-designed parameters for the specific grid condition can be delivered to the manufacturer for further parameters modification. Simulation results are given to validate the proposed grey-box parameter identification and corresponding impedance reshaping method.
OriginalsprogEngelsk
TitelProceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
Antal sider8
ForlagIEEE Press
Publikationsdatomaj 2019
StatusUdgivet - maj 2019
Begivenhed2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) - Busan, Sydkorea
Varighed: 27 maj 201930 maj 2019

Konference

Konference2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
LandSydkorea
ByBusan
Periode27/05/201930/05/2019

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Identification (control systems)
Capacitors
Damping
Feedback
Stability criteria
Frequency response
Controllers

Citer dette

Zhou, W., Wang, Y., Cai, P., & Chen, Z. (2019). A Grey-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping. I Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) IEEE Press.
Zhou, Weihua ; Wang, Yanbo ; Cai, Pei ; Chen, Zhe. / A Grey-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping. Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia). IEEE Press, 2019.
@inproceedings{70593ffb9ce44a2f9c46506122850d8f,
title = "A Grey-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping",
abstract = "Resonance phenomenon of grid-connected inverter may happen due to dynamic variation of grid impedance. Terminal output impedance of inverter can be reshaped by retuning internal parameters of inverter to mitigate resonance issue and stabilize grid-connected inverter system. However, it’s not easy to obtain internal parameters of grid-connected inverter in practical operation due to industrial secrecy. This paper presents a grey-box parameters identification method to extract the internal parameters of LCL filter, the proportional coefficient of current controller and capacitor-current feedback coefficient from the measured terminal impedance frequency responses by using vector fitting algorithm. When instability phenomenon of multiple-parallel inverters system occurs, the internal parameters of each inverter are first identified by using the proposed method. Then, the capacitor-current-feedback coefficients are re-tuned to stabilize the studied power system according to the impedance-based stability criterion. The re-designed parameters for the specific grid condition can be delivered to the manufacturer for further parameters modification. Simulation results are given to validate the proposed grey-box parameter identification and corresponding impedance reshaping method.",
keywords = "Capacitor-current-feedback coefficient, Gray-box parameter identification, Grid-connected inverter, Impedance reshaping",
author = "Weihua Zhou and Yanbo Wang and Pei Cai and Zhe Chen",
year = "2019",
month = "5",
language = "English",
booktitle = "Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)",
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Zhou, W, Wang, Y, Cai, P & Chen, Z 2019, A Grey-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping. i Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia). IEEE Press, Busan, Sydkorea, 27/05/2019.

A Grey-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping. / Zhou, Weihua; Wang, Yanbo; Cai, Pei; Chen, Zhe.

Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia). IEEE Press, 2019.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

T1 - A Grey-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping

AU - Zhou, Weihua

AU - Wang, Yanbo

AU - Cai, Pei

AU - Chen, Zhe

PY - 2019/5

Y1 - 2019/5

N2 - Resonance phenomenon of grid-connected inverter may happen due to dynamic variation of grid impedance. Terminal output impedance of inverter can be reshaped by retuning internal parameters of inverter to mitigate resonance issue and stabilize grid-connected inverter system. However, it’s not easy to obtain internal parameters of grid-connected inverter in practical operation due to industrial secrecy. This paper presents a grey-box parameters identification method to extract the internal parameters of LCL filter, the proportional coefficient of current controller and capacitor-current feedback coefficient from the measured terminal impedance frequency responses by using vector fitting algorithm. When instability phenomenon of multiple-parallel inverters system occurs, the internal parameters of each inverter are first identified by using the proposed method. Then, the capacitor-current-feedback coefficients are re-tuned to stabilize the studied power system according to the impedance-based stability criterion. The re-designed parameters for the specific grid condition can be delivered to the manufacturer for further parameters modification. Simulation results are given to validate the proposed grey-box parameter identification and corresponding impedance reshaping method.

AB - Resonance phenomenon of grid-connected inverter may happen due to dynamic variation of grid impedance. Terminal output impedance of inverter can be reshaped by retuning internal parameters of inverter to mitigate resonance issue and stabilize grid-connected inverter system. However, it’s not easy to obtain internal parameters of grid-connected inverter in practical operation due to industrial secrecy. This paper presents a grey-box parameters identification method to extract the internal parameters of LCL filter, the proportional coefficient of current controller and capacitor-current feedback coefficient from the measured terminal impedance frequency responses by using vector fitting algorithm. When instability phenomenon of multiple-parallel inverters system occurs, the internal parameters of each inverter are first identified by using the proposed method. Then, the capacitor-current-feedback coefficients are re-tuned to stabilize the studied power system according to the impedance-based stability criterion. The re-designed parameters for the specific grid condition can be delivered to the manufacturer for further parameters modification. Simulation results are given to validate the proposed grey-box parameter identification and corresponding impedance reshaping method.

KW - Capacitor-current-feedback coefficient

KW - Gray-box parameter identification

KW - Grid-connected inverter

KW - Impedance reshaping

M3 - Article in proceeding

BT - Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)

PB - IEEE Press

ER -

Zhou W, Wang Y, Cai P, Chen Z. A Grey-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping. I Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia). IEEE Press. 2019