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A variable-bandwidth cascaded extended state observer for voltage control in dual three-phase PMSG drives.

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Title: A variable-bandwidth cascaded extended state observer for voltage control in dual three-phase PMSG drives.
Authors: Li, Pei1 (AUTHOR) 23S136545@stu.hit.edu.cn, Li, Pan1 (AUTHOR) 23S106105@stu.hit.edu.cn, Yang, Guijie1 (AUTHOR) yangguijie@hit.edu.cn, Su, Jianyong1 (AUTHOR) sujianyong@hit.edu.cn
Source: Electrical Engineering. Feb2026, Vol. 108 Issue 2, p1-14. 14p.
Abstract: The linear extended state observer (LESO) has been widely applied to the voltage regulation of dual three-phase permanent magnet synchronous generators (DTP-PMSGs), owing to its low model dependency and straightforward parameter tuning. However, the conventional LESO exhibits drawbacks in terms of slow convergence and limited disturbance estimation accuracy, which degrade the disturbance rejection and tracking performance of the voltage control loop. To address these limitations, this paper proposes a voltage control method utilizing a variable-bandwidth cascaded extended state observer (VCESO). First, a cascaded observer structure is adopted to expand the observation range and enhance disturbance rejection capability. Then, an adaptive variable-bandwidth mechanism following the principle of "large error, high bandwidth; small error, low bandwidth" is integrated into the cascaded ESO (CESO). This design mitigates the inherent oscillations of disturbance estimation in CESO, while further improving both disturbance rejection and reference tracking performance of the voltage loop. Finally, the feasibility and effectiveness of the proposed VCESO are validated on a DTP-PMSG system through experimental results. [ABSTRACT FROM AUTHOR]
Copyright of Electrical Engineering is the property of Springer Nature 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: A variable-bandwidth cascaded extended state observer for voltage control in dual three-phase PMSG drives.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Pei%22">Li, Pei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 23S136545@stu.hit.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Pan%22">Li, Pan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 23S106105@stu.hit.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Yang%2C+Guijie%22">Yang, Guijie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yangguijie@hit.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Su%2C+Jianyong%22">Su, Jianyong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sujianyong@hit.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Electrical+Engineering%22">Electrical Engineering</searchLink>. Feb2026, Vol. 108 Issue 2, p1-14. 14p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The linear extended state observer (LESO) has been widely applied to the voltage regulation of dual three-phase permanent magnet synchronous generators (DTP-PMSGs), owing to its low model dependency and straightforward parameter tuning. However, the conventional LESO exhibits drawbacks in terms of slow convergence and limited disturbance estimation accuracy, which degrade the disturbance rejection and tracking performance of the voltage control loop. To address these limitations, this paper proposes a voltage control method utilizing a variable-bandwidth cascaded extended state observer (VCESO). First, a cascaded observer structure is adopted to expand the observation range and enhance disturbance rejection capability. Then, an adaptive variable-bandwidth mechanism following the principle of "large error, high bandwidth; small error, low bandwidth" is integrated into the cascaded ESO (CESO). This design mitigates the inherent oscillations of disturbance estimation in CESO, while further improving both disturbance rejection and reference tracking performance of the voltage loop. Finally, the feasibility and effectiveness of the proposed VCESO are validated on a DTP-PMSG system through experimental results. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Electrical Engineering is the property of Springer Nature 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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      – Type: doi
        Value: 10.1007/s00202-025-03363-6
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        Text: English
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      – TitleFull: A variable-bandwidth cascaded extended state observer for voltage control in dual three-phase PMSG drives.
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            NameFull: Li, Pei
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            NameFull: Li, Pan
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            NameFull: Yang, Guijie
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              Text: Feb2026
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              Y: 2026
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