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Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC.

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Title: Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC.
Authors: Zhao, Boyuan1 (AUTHOR), Chen, Lei1 (AUTHOR) chenlei08@tsinghua.edu.cn, Min, Yong1 (AUTHOR), Li, Yalou2 (AUTHOR), Xu, Shiyun2 (AUTHOR)
Source: IET Renewable Power Generation (Wiley-Blackwell). 2/24/2024, Vol. 18 Issue 3, p412-425. 14p.
Subject Terms: Phase-locked loops, Torque, Electric transients, Stability criterion, Ideal sources (Electric circuits)
Abstract: Sub‐synchronous oscillation of grid‐connected voltage source converter (VSC) dominated by phase locked loop (PLL) is an important stability issue in nowadays power systems. The complex torque coefficient method has been used to investigate the issue because of its advantage of giving insights into source of damping and contributions of different components on damping. However, it is found that the classic complex torque coefficient method is not entirely applicable for stability analysis of VSC because of the proportional term in PLL. This paper proposes a corrected complex torque coefficient method and defines synchronous and damping coefficients. Based on the proposed method, a small‐signal stability criterion is obtained, in which the system stability depends on the sign of corrected damping coefficient. The impacts of different elements on system damping can be quantitatively evaluated through the method. It is drawn that current control loop and line dynamics contribute negative damping, whereas power control loop contributes positive damping. Moreover, the impacts of operating conditions and controller parameters on damping of different elements are analysed. The eigenvalue analyses and electromagnetic transient simulations have verified the theoretical analysis. [ABSTRACT FROM AUTHOR]
Copyright of IET Renewable Power Generation (Wiley-Blackwell) is the property of Wiley-Blackwell 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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An: 175673259
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  Label: Title
  Group: Ti
  Data: Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC.
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  Data: <searchLink fieldCode="AR" term="%22Zhao%2C+Boyuan%22">Zhao, Boyuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Lei%22">Chen, Lei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chenlei08@tsinghua.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Min%2C+Yong%22">Min, Yong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Yalou%22">Li, Yalou</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Shiyun%22">Xu, Shiyun</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22IET+Renewable+Power+Generation+%28Wiley-Blackwell%29%22">IET Renewable Power Generation (Wiley-Blackwell)</searchLink>. 2/24/2024, Vol. 18 Issue 3, p412-425. 14p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Phase-locked+loops%22">Phase-locked loops</searchLink><br /><searchLink fieldCode="DE" term="%22Torque%22">Torque</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+transients%22">Electric transients</searchLink><br /><searchLink fieldCode="DE" term="%22Stability+criterion%22">Stability criterion</searchLink><br /><searchLink fieldCode="DE" term="%22Ideal+sources+%28Electric+circuits%29%22">Ideal sources (Electric circuits)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Sub‐synchronous oscillation of grid‐connected voltage source converter (VSC) dominated by phase locked loop (PLL) is an important stability issue in nowadays power systems. The complex torque coefficient method has been used to investigate the issue because of its advantage of giving insights into source of damping and contributions of different components on damping. However, it is found that the classic complex torque coefficient method is not entirely applicable for stability analysis of VSC because of the proportional term in PLL. This paper proposes a corrected complex torque coefficient method and defines synchronous and damping coefficients. Based on the proposed method, a small‐signal stability criterion is obtained, in which the system stability depends on the sign of corrected damping coefficient. The impacts of different elements on system damping can be quantitatively evaluated through the method. It is drawn that current control loop and line dynamics contribute negative damping, whereas power control loop contributes positive damping. Moreover, the impacts of operating conditions and controller parameters on damping of different elements are analysed. The eigenvalue analyses and electromagnetic transient simulations have verified the theoretical analysis. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of IET Renewable Power Generation (Wiley-Blackwell) is the property of Wiley-Blackwell 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: 10.1049/rpg2.12857
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 14
        StartPage: 412
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      – SubjectFull: Phase-locked loops
        Type: general
      – SubjectFull: Torque
        Type: general
      – SubjectFull: Electric transients
        Type: general
      – SubjectFull: Stability criterion
        Type: general
      – SubjectFull: Ideal sources (Electric circuits)
        Type: general
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      – TitleFull: Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC.
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            NameFull: Zhao, Boyuan
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            NameFull: Chen, Lei
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            NameFull: Min, Yong
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            NameFull: Li, Yalou
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            NameFull: Xu, Shiyun
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            – D: 24
              M: 02
              Text: 2/24/2024
              Type: published
              Y: 2024
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