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Capacitor-Voltage-Feedback Active Damping With Reduced Computation Delay for Improving Voltage Control Performance of LC-Type Grid-Forming Inverter
  • +1
  • Jian Yu,
  • Yingru Cheng,
  • Yifan Hou,
  • Yulong Hao
Jian Yu
Shanxi University School of Automation and Software
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Yingru Cheng
Shanxi University School of Automation and Software

Corresponding Author:[email protected]

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Yifan Hou
Shanxi University School of Automation and Software
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Yulong Hao
Shanxi University School of Automation and Software
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Abstract

In low-voltage applications using low-Q LC filters, alias-free capacitor voltage acquisition can be achieved, but synchronous capacitor voltage sampling under high-Q filters used in high-voltage applications in grid-forming converters causes some degree of distortion and results in degradation of the power supply quality. And the 1.5 beat delay inherent in this approach limits the control bandwidth, reduces the stability region, and results in an inadequate time domain response. Despite these shortcomings, this approach is widely accepted in practice. This paper concludes that sampling 2us before the synchronous instant results in almost the same distortion as synchronous sampling, however, it can improve the dynamic performance of the system. A distortion-acceptable univariate feedback voltage dual-loop active damping control topology with much reduced computational delay is proposed, which is based on an internal active damping loop using a discrete lead compensator and a proportional resonance controller in the external voltage loop.
Submitted to International Journal of Circuit Theory and Applications
Submission Checks Completed
Assigned to Editor
Reviewer(s) Assigned
03 Jul 2024Review(s) Completed, Editorial Evaluation Pending
03 Jul 2024Reviewer(s) Assigned
24 Jul 2024Editorial Decision: Revise Major
01 Sep 20241st Revision Received
04 Sep 2024Submission Checks Completed
04 Sep 2024Assigned to Editor
04 Sep 2024Review(s) Completed, Editorial Evaluation Pending
05 Sep 2024Reviewer(s) Assigned
25 Sep 2024Editorial Decision: Accept