Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/616882
Title: Robust two degrees-of-freedom single-current control strategy for LCL-type grid-connected DG system under grid-frequency fluctuation and grid-impedance variation
Authors: Leming Zhou;Yandong Chen;An Luo;Josep M. Guerrero;Xiaoping Zhou;Zhiyong Chen;Wenhua Wu
subject: single-current control strategy|grid-impedance variation|grid-frequency fluctuation|instantaneous grid current|synchronous reference frame quasiproportional-integral|RGCFAD control|LCL-type grid-connected DG system|SRFQPI control|local-load reactive power|robust grid-current-feedback active-damping control
Year: 2016
Publisher: IEEE
Abstract: For LCL-type grid-connected distributed generation (DG) system, the grid-frequency fluctuation and grid-impedance variation affect the active/reactive power control accuracy and resonance peak suppression, respectively, which would reduce the system robustness. In this study, a robust two degrees-of-freedom single-current control strategy is proposed, which mainly includes the synchronous reference frame quasi-proportional-integral (SRFQPI) control and robust grid-current-feedback active-damping (RGCFAD) control. The proposed SRFQPI control can compensate the local-load reactive power, and regulate the instantaneous grid current without steady-state error regardless of the fundamental frequency fluctuation. Simultaneously, the proposed RGCFAD control effectively damps the LCL-resonance peak regardless of the grid-impedance variation, and further improves both transient and steady-state performances. The stability margin and dynamic response of the overall system are analysed in detail, and the proper parameters are selected without complicated trial. Finally, simulation and experimental results verify the proposed control and design strategies.
Description: 
URI: http://localhost/handle/Hannan/155276
http://localhost/handle/Hannan/616882
ISSN: 1755-4535
volume: 9
issue: 14
Appears in Collections:2016

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Title: Robust two degrees-of-freedom single-current control strategy for LCL-type grid-connected DG system under grid-frequency fluctuation and grid-impedance variation
Authors: Leming Zhou;Yandong Chen;An Luo;Josep M. Guerrero;Xiaoping Zhou;Zhiyong Chen;Wenhua Wu
subject: single-current control strategy|grid-impedance variation|grid-frequency fluctuation|instantaneous grid current|synchronous reference frame quasiproportional-integral|RGCFAD control|LCL-type grid-connected DG system|SRFQPI control|local-load reactive power|robust grid-current-feedback active-damping control
Year: 2016
Publisher: IEEE
Abstract: For LCL-type grid-connected distributed generation (DG) system, the grid-frequency fluctuation and grid-impedance variation affect the active/reactive power control accuracy and resonance peak suppression, respectively, which would reduce the system robustness. In this study, a robust two degrees-of-freedom single-current control strategy is proposed, which mainly includes the synchronous reference frame quasi-proportional-integral (SRFQPI) control and robust grid-current-feedback active-damping (RGCFAD) control. The proposed SRFQPI control can compensate the local-load reactive power, and regulate the instantaneous grid current without steady-state error regardless of the fundamental frequency fluctuation. Simultaneously, the proposed RGCFAD control effectively damps the LCL-resonance peak regardless of the grid-impedance variation, and further improves both transient and steady-state performances. The stability margin and dynamic response of the overall system are analysed in detail, and the proper parameters are selected without complicated trial. Finally, simulation and experimental results verify the proposed control and design strategies.
Description: 
URI: http://localhost/handle/Hannan/155276
http://localhost/handle/Hannan/616882
ISSN: 1755-4535
volume: 9
issue: 14
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7746046.pdf1.11 MBAdobe PDFThumbnail
Preview File
Title: Robust two degrees-of-freedom single-current control strategy for LCL-type grid-connected DG system under grid-frequency fluctuation and grid-impedance variation
Authors: Leming Zhou;Yandong Chen;An Luo;Josep M. Guerrero;Xiaoping Zhou;Zhiyong Chen;Wenhua Wu
subject: single-current control strategy|grid-impedance variation|grid-frequency fluctuation|instantaneous grid current|synchronous reference frame quasiproportional-integral|RGCFAD control|LCL-type grid-connected DG system|SRFQPI control|local-load reactive power|robust grid-current-feedback active-damping control
Year: 2016
Publisher: IEEE
Abstract: For LCL-type grid-connected distributed generation (DG) system, the grid-frequency fluctuation and grid-impedance variation affect the active/reactive power control accuracy and resonance peak suppression, respectively, which would reduce the system robustness. In this study, a robust two degrees-of-freedom single-current control strategy is proposed, which mainly includes the synchronous reference frame quasi-proportional-integral (SRFQPI) control and robust grid-current-feedback active-damping (RGCFAD) control. The proposed SRFQPI control can compensate the local-load reactive power, and regulate the instantaneous grid current without steady-state error regardless of the fundamental frequency fluctuation. Simultaneously, the proposed RGCFAD control effectively damps the LCL-resonance peak regardless of the grid-impedance variation, and further improves both transient and steady-state performances. The stability margin and dynamic response of the overall system are analysed in detail, and the proper parameters are selected without complicated trial. Finally, simulation and experimental results verify the proposed control and design strategies.
Description: 
URI: http://localhost/handle/Hannan/155276
http://localhost/handle/Hannan/616882
ISSN: 1755-4535
volume: 9
issue: 14
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7746046.pdf1.11 MBAdobe PDFThumbnail
Preview File