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Mechanism Analysis of Wide-Band Oscillation Amplification for Long-Distance AC Transmission Lines.

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Title: Mechanism Analysis of Wide-Band Oscillation Amplification for Long-Distance AC Transmission Lines.
Authors: Li, Ning1 (AUTHOR), Fan, Chen2 (AUTHOR), Li, Yudun3 (AUTHOR), Jin, Biao1 (AUTHOR), Yang, Xuchen1,2 (AUTHOR), Yu, Yiping1,3 (AUTHOR) yyiping@hhu.edu.cn
Source: Energies (19961073). Oct2025, Vol. 18 Issue 19, p5106. 20p.
Subjects: Wave amplification, Electric power system stability, Parameterization, Power electronics, Frequencies of oscillating systems, Flexible AC transmission systems
Abstract: The increasing integration of renewable energy has led to power systems characterized by a high penetration of renewable energy sources (RES) and power electronic devices (PEDs). However, wide-band oscillation phenomena caused by RES grid integration have emerged and propagated through transmission networks. Notably, large-scale renewable energy bases located in remote areas are typically connected to the main grid via long-distance AC transmission lines. These lines exhibit an inter-harmonic amplification effect, which may exacerbate the propagation and amplification of wide-band oscillations, posing significant risks to bulk power-grid stability. This paper establishes impedance models of long-distance AC transmission lines and asynchronous motors under wide-band oscillation frequencies, and derives equivalent line parameters mathematically to reveal the oscillation amplification problem of long-distance renewable energy oscillation transmission through AC transmission lines. A transfer coefficient is defined to quantify inter-harmonic current amplification. A single-machine-load model is developed in MATLAB/Simulink to validate the proposed model. Furthermore, the influence of line parameters on oscillation amplification is analyzed, and a suppression strategy is proposed. This study provides valuable insights for the parameter design of long-distance transmission lines in renewable energy integration scenarios, as it helps mitigate potential inter-harmonic amplification risks by reducing the peak values of the transfer coefficient. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI 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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DbLabel: Engineering Source
An: 188680721
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  Label: Title
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  Data: Mechanism Analysis of Wide-Band Oscillation Amplification for Long-Distance AC Transmission Lines.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Ning%22">Li, Ning</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fan%2C+Chen%22">Fan, Chen</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Yudun%22">Li, Yudun</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jin%2C+Biao%22">Jin, Biao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Xuchen%22">Yang, Xuchen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Yiping%22">Yu, Yiping</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> yyiping@hhu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Oct2025, Vol. 18 Issue 19, p5106. 20p.
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  Data: <searchLink fieldCode="DE" term="%22Wave+amplification%22">Wave amplification</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+power+system+stability%22">Electric power system stability</searchLink><br /><searchLink fieldCode="DE" term="%22Parameterization%22">Parameterization</searchLink><br /><searchLink fieldCode="DE" term="%22Power+electronics%22">Power electronics</searchLink><br /><searchLink fieldCode="DE" term="%22Frequencies+of+oscillating+systems%22">Frequencies of oscillating systems</searchLink><br /><searchLink fieldCode="DE" term="%22Flexible+AC+transmission+systems%22">Flexible AC transmission systems</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The increasing integration of renewable energy has led to power systems characterized by a high penetration of renewable energy sources (RES) and power electronic devices (PEDs). However, wide-band oscillation phenomena caused by RES grid integration have emerged and propagated through transmission networks. Notably, large-scale renewable energy bases located in remote areas are typically connected to the main grid via long-distance AC transmission lines. These lines exhibit an inter-harmonic amplification effect, which may exacerbate the propagation and amplification of wide-band oscillations, posing significant risks to bulk power-grid stability. This paper establishes impedance models of long-distance AC transmission lines and asynchronous motors under wide-band oscillation frequencies, and derives equivalent line parameters mathematically to reveal the oscillation amplification problem of long-distance renewable energy oscillation transmission through AC transmission lines. A transfer coefficient is defined to quantify inter-harmonic current amplification. A single-machine-load model is developed in MATLAB/Simulink to validate the proposed model. Furthermore, the influence of line parameters on oscillation amplification is analyzed, and a suppression strategy is proposed. This study provides valuable insights for the parameter design of long-distance transmission lines in renewable energy integration scenarios, as it helps mitigate potential inter-harmonic amplification risks by reducing the peak values of the transfer coefficient. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI 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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        Value: 10.3390/en18195106
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        Text: English
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        PageCount: 20
        StartPage: 5106
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      – SubjectFull: Wave amplification
        Type: general
      – SubjectFull: Electric power system stability
        Type: general
      – SubjectFull: Parameterization
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      – SubjectFull: Power electronics
        Type: general
      – SubjectFull: Frequencies of oscillating systems
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      – SubjectFull: Flexible AC transmission systems
        Type: general
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      – TitleFull: Mechanism Analysis of Wide-Band Oscillation Amplification for Long-Distance AC Transmission Lines.
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            NameFull: Li, Ning
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            NameFull: Fan, Chen
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              M: 10
              Text: Oct2025
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