Identification of the DQ impedance model for three-phase power converter considering the coupling effect of the grid impedance

Hong Gong, Dongsheng Yang, Xiongfei Wang

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

Resumé

The impedance-based analysis has been widely applied for predicting the system stability based on the ratio of the impedance of the converter to the equivalent system impedance. However, the analytical impedance model is difficult to be obtained since system operators cannot access to the internal control details of the converters. Therefore, the impedance measurements can be utilized to obtain the black-box impedance model of converters. Due to the cross-coupling terms in converter impedance models in the dq-frame, perturbation injected on one channel would cause response on the other channel, which couples to the grid impedance. The interaction will influence the accuracy of the measured impedance of the converter. This paper investigates the mechanism of the coupling between the grid impedance and converter impedance during the impedance measurement. It is revealed that the coupling influence makes the measured impedance model behave as a multi-input-multi-output (MIMO) system instead of the decoupled single-input-single-output (SISO) systems. To mitigate the influence of grid impedance on the converter impedance measurement, a MIMO parametric identification method is proposed for the direct measurement of the converter impedance matrix with a single-measurement. Experimental results are presented to demonstrate the effectiveness of the proposed method.
OriginalsprogEngelsk
TitelProceedings of 2019 IEEE Annual Applied Power Electronics Conference and Exposition (APEC 2019)
Antal sider7
ForlagIEEE Press
Publikationsdatomar. 2019
Sider120-126
Artikelnummer8722307
DOI
StatusUdgivet - mar. 2019
Begivenhed34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 - Anaheim, USA
Varighed: 17 mar. 201921 mar. 2019

Konference

Konference34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
LandUSA
ByAnaheim
Periode17/03/201921/03/2019
SponsorIEEE Industry Applications Society (IAS), IEEE Power Electronics Society (PELS), Power Sources Manufacturers Association (PSMA)
NavnConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Vol/bind2019-March

Fingerprint

Power converters
Identification (control systems)
System stability

Citer dette

Gong, H., Yang, D., & Wang, X. (2019). Identification of the DQ impedance model for three-phase power converter considering the coupling effect of the grid impedance. I Proceedings of 2019 IEEE Annual Applied Power Electronics Conference and Exposition (APEC 2019) (s. 120-126). [8722307] IEEE Press. Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Bind. 2019-March https://doi.org/10.1109/APEC.2019.8722307
Gong, Hong ; Yang, Dongsheng ; Wang, Xiongfei. / Identification of the DQ impedance model for three-phase power converter considering the coupling effect of the grid impedance. Proceedings of 2019 IEEE Annual Applied Power Electronics Conference and Exposition (APEC 2019). IEEE Press, 2019. s. 120-126 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Bind 2019-March).
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title = "Identification of the DQ impedance model for three-phase power converter considering the coupling effect of the grid impedance",
abstract = "The impedance-based analysis has been widely applied for predicting the system stability based on the ratio of the impedance of the converter to the equivalent system impedance. However, the analytical impedance model is difficult to be obtained since system operators cannot access to the internal control details of the converters. Therefore, the impedance measurements can be utilized to obtain the black-box impedance model of converters. Due to the cross-coupling terms in converter impedance models in the dq-frame, perturbation injected on one channel would cause response on the other channel, which couples to the grid impedance. The interaction will influence the accuracy of the measured impedance of the converter. This paper investigates the mechanism of the coupling between the grid impedance and converter impedance during the impedance measurement. It is revealed that the coupling influence makes the measured impedance model behave as a multi-input-multi-output (MIMO) system instead of the decoupled single-input-single-output (SISO) systems. To mitigate the influence of grid impedance on the converter impedance measurement, a MIMO parametric identification method is proposed for the direct measurement of the converter impedance matrix with a single-measurement. Experimental results are presented to demonstrate the effectiveness of the proposed method.",
keywords = "Impedance measurement, MIMO, Parametric identification, VSC",
author = "Hong Gong and Dongsheng Yang and Xiongfei Wang",
year = "2019",
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Gong, H, Yang, D & Wang, X 2019, Identification of the DQ impedance model for three-phase power converter considering the coupling effect of the grid impedance. i Proceedings of 2019 IEEE Annual Applied Power Electronics Conference and Exposition (APEC 2019)., 8722307, IEEE Press, Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, bind 2019-March, s. 120-126, Anaheim, USA, 17/03/2019. https://doi.org/10.1109/APEC.2019.8722307

Identification of the DQ impedance model for three-phase power converter considering the coupling effect of the grid impedance. / Gong, Hong; Yang, Dongsheng; Wang, Xiongfei.

Proceedings of 2019 IEEE Annual Applied Power Electronics Conference and Exposition (APEC 2019). IEEE Press, 2019. s. 120-126 8722307 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Bind 2019-March).

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

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N2 - The impedance-based analysis has been widely applied for predicting the system stability based on the ratio of the impedance of the converter to the equivalent system impedance. However, the analytical impedance model is difficult to be obtained since system operators cannot access to the internal control details of the converters. Therefore, the impedance measurements can be utilized to obtain the black-box impedance model of converters. Due to the cross-coupling terms in converter impedance models in the dq-frame, perturbation injected on one channel would cause response on the other channel, which couples to the grid impedance. The interaction will influence the accuracy of the measured impedance of the converter. This paper investigates the mechanism of the coupling between the grid impedance and converter impedance during the impedance measurement. It is revealed that the coupling influence makes the measured impedance model behave as a multi-input-multi-output (MIMO) system instead of the decoupled single-input-single-output (SISO) systems. To mitigate the influence of grid impedance on the converter impedance measurement, a MIMO parametric identification method is proposed for the direct measurement of the converter impedance matrix with a single-measurement. Experimental results are presented to demonstrate the effectiveness of the proposed method.

AB - The impedance-based analysis has been widely applied for predicting the system stability based on the ratio of the impedance of the converter to the equivalent system impedance. However, the analytical impedance model is difficult to be obtained since system operators cannot access to the internal control details of the converters. Therefore, the impedance measurements can be utilized to obtain the black-box impedance model of converters. Due to the cross-coupling terms in converter impedance models in the dq-frame, perturbation injected on one channel would cause response on the other channel, which couples to the grid impedance. The interaction will influence the accuracy of the measured impedance of the converter. This paper investigates the mechanism of the coupling between the grid impedance and converter impedance during the impedance measurement. It is revealed that the coupling influence makes the measured impedance model behave as a multi-input-multi-output (MIMO) system instead of the decoupled single-input-single-output (SISO) systems. To mitigate the influence of grid impedance on the converter impedance measurement, a MIMO parametric identification method is proposed for the direct measurement of the converter impedance matrix with a single-measurement. Experimental results are presented to demonstrate the effectiveness of the proposed method.

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Gong H, Yang D, Wang X. Identification of the DQ impedance model for three-phase power converter considering the coupling effect of the grid impedance. I Proceedings of 2019 IEEE Annual Applied Power Electronics Conference and Exposition (APEC 2019). IEEE Press. 2019. s. 120-126. 8722307. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Bind 2019-March). https://doi.org/10.1109/APEC.2019.8722307