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

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

Oscillation phenomenon of grid-connected inverter can be caused due to time-varying grid impedance. Terminal output impedance of inverter can be reshaped by re-tuning internal parameters of inverter to mitigate the oscillation issue. However, it's not easy to obtain internal parameters of grid-connected inverter in practical operation. This paper presents a gray-box parameters identification method to identify the 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-paralleled 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 manufacturers for further parameters modification. Simulation results are given to validate the proposed gray-box parameter identification and corresponding impedance reshaping method.
Original languageEnglish
Title of host publicationProceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
Number of pages8
PublisherIEEE Press
Publication dateMay 2019
ISBN (Electronic)978-89-5708-313-0
Publication statusPublished - May 2019
Event2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) - Busan, Korea, Republic of
Duration: 27 May 201930 May 2019

Conference

Conference2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
CountryKorea, Republic of
CityBusan
Period27/05/201930/05/2019
SeriesInternational Conference on Power Electronics
ISSN2150-6078

Fingerprint

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

Keywords

  • Capacitor-current-feedback coefficient
  • Gray-box parameter identification
  • Grid-connected inverter ,
  • Impedance reshaping

Cite this

Hu, W., Wang, Y., Cai, P., & Chen, Z. (2019). A Gray-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping. In Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) IEEE Press. International Conference on Power Electronics
Hu, Weihao ; Wang, Yanbo ; Cai, Pei ; Chen, Zhe. / A Gray-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. (International Conference on Power Electronics).
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title = "A Gray-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping",
abstract = "Oscillation phenomenon of grid-connected inverter can be caused due to time-varying grid impedance. Terminal output impedance of inverter can be reshaped by re-tuning internal parameters of inverter to mitigate the oscillation issue. However, it's not easy to obtain internal parameters of grid-connected inverter in practical operation. This paper presents a gray-box parameters identification method to identify the 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-paralleled 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 manufacturers for further parameters modification. Simulation results are given to validate the proposed gray-box parameter identification and corresponding impedance reshaping method.",
keywords = "Capacitor-current-feedback coefficient, Gray-box parameter identification, Grid-connected inverter ,, Impedance reshaping",
author = "Weihao Hu and Yanbo Wang and Pei Cai and Zhe Chen",
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Hu, W, Wang, Y, Cai, P & Chen, Z 2019, A Gray-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping. in Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia). IEEE Press, International Conference on Power Electronics, 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia), Busan, Korea, Republic of, 27/05/2019.

A Gray-Box Impedance Reshaping Method of Grid-Connected Inverter for Resonance Damping. / Hu, Weihao; 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. (International Conference on Power Electronics).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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

AU - Hu, Weihao

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AU - Cai, Pei

AU - Chen, Zhe

PY - 2019/5

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N2 - Oscillation phenomenon of grid-connected inverter can be caused due to time-varying grid impedance. Terminal output impedance of inverter can be reshaped by re-tuning internal parameters of inverter to mitigate the oscillation issue. However, it's not easy to obtain internal parameters of grid-connected inverter in practical operation. This paper presents a gray-box parameters identification method to identify the 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-paralleled 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 manufacturers for further parameters modification. Simulation results are given to validate the proposed gray-box parameter identification and corresponding impedance reshaping method.

AB - Oscillation phenomenon of grid-connected inverter can be caused due to time-varying grid impedance. Terminal output impedance of inverter can be reshaped by re-tuning internal parameters of inverter to mitigate the oscillation issue. However, it's not easy to obtain internal parameters of grid-connected inverter in practical operation. This paper presents a gray-box parameters identification method to identify the 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-paralleled 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 manufacturers for further parameters modification. Simulation results are given to validate the proposed gray-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

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

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