Analysis and Experimental Characterization of a Large-Bandwidth Triple-Loop Controller for Grid-Tied Inverters.

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Title: Analysis and Experimental Characterization of a Large-Bandwidth Triple-Loop Controller for Grid-Tied Inverters.
Authors: Buso, Simone, Caldognetto, Tommaso, Liu, Qing
Source: IEEE Transactions on Power Electronics. Feb2019, Vol. 34 Issue 2, p1936-1949. 14p.
Subjects: Bandwidths, Closed loop systems, Electric current converters, Digital control systems, Microgrids
Abstract: This paper analyzes a large-bandwidth, triple-loop controller designed for single-phase, grid-tied, and voltage–source inverters with LCL output filter. The inner control loops regulate the inverter output current and the filter capacitor voltage, respectively, while the third, outer one regulates the current injected into the grid. The inner loops are given deadbeat type regulators, whose minimum response delay allows the third loop to achieve a relatively large regulation bandwidth. This organization provides several benefits, including a regulated local ac voltage, a large-bandwidth control of the power flowing to the grid, and a good robustness against different types of commonly encountered grid perturbations. In particular, grid voltage harmonic pollution, amplitude, and frequency fluctuations or connection impedance parameter variations can be tolerated without incurring into instability or unacceptable performance degradation. Besides, the proposed controller is inherently able to guarantee seamless transitions between grid-tied and islanded operation, showing good potential for application to nano- and microgrid utility interface converters. [ABSTRACT FROM AUTHOR]
Copyright of IEEE Transactions on Power Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Analysis and Experimental Characterization of a Large-Bandwidth Triple-Loop Controller for Grid-Tied Inverters.
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  Data: <searchLink fieldCode="AR" term="%22Buso%2C+Simone%22">Buso, Simone</searchLink><br /><searchLink fieldCode="AR" term="%22Caldognetto%2C+Tommaso%22">Caldognetto, Tommaso</searchLink><br /><searchLink fieldCode="AR" term="%22Liu%2C+Qing%22">Liu, Qing</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22IEEE+Transactions+on+Power+Electronics%22">IEEE Transactions on Power Electronics</searchLink>. Feb2019, Vol. 34 Issue 2, p1936-1949. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Bandwidths%22">Bandwidths</searchLink><br /><searchLink fieldCode="DE" term="%22Closed+loop+systems%22">Closed loop systems</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+current+converters%22">Electric current converters</searchLink><br /><searchLink fieldCode="DE" term="%22Digital+control+systems%22">Digital control systems</searchLink><br /><searchLink fieldCode="DE" term="%22Microgrids%22">Microgrids</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper analyzes a large-bandwidth, triple-loop controller designed for single-phase, grid-tied, and voltage–source inverters with LCL output filter. The inner control loops regulate the inverter output current and the filter capacitor voltage, respectively, while the third, outer one regulates the current injected into the grid. The inner loops are given deadbeat type regulators, whose minimum response delay allows the third loop to achieve a relatively large regulation bandwidth. This organization provides several benefits, including a regulated local ac voltage, a large-bandwidth control of the power flowing to the grid, and a good robustness against different types of commonly encountered grid perturbations. In particular, grid voltage harmonic pollution, amplitude, and frequency fluctuations or connection impedance parameter variations can be tolerated without incurring into instability or unacceptable performance degradation. Besides, the proposed controller is inherently able to guarantee seamless transitions between grid-tied and islanded operation, showing good potential for application to nano- and microgrid utility interface converters. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of IEEE Transactions on Power Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1109/TPEL.2018.2835158
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      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 1936
    Subjects:
      – SubjectFull: Bandwidths
        Type: general
      – SubjectFull: Closed loop systems
        Type: general
      – SubjectFull: Electric current converters
        Type: general
      – SubjectFull: Digital control systems
        Type: general
      – SubjectFull: Microgrids
        Type: general
    Titles:
      – TitleFull: Analysis and Experimental Characterization of a Large-Bandwidth Triple-Loop Controller for Grid-Tied Inverters.
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            NameFull: Buso, Simone
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            NameFull: Caldognetto, Tommaso
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            NameFull: Liu, Qing
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              M: 02
              Text: Feb2019
              Type: published
              Y: 2019
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              Value: 34
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            – TitleFull: IEEE Transactions on Power Electronics
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