Modeling and Tuning of Circular Limit Cycle Oscillator FLL With Pre-Loop Filter

Miao Lin Pay, Hafiz Ahmed

Research output: Contribution to journalArticle

Abstract

Circular limit cycle oscillator- frequency-locked loop (CLO-FLL) is a recently proposed advanced nonlinear technique for the parameter estimation of grid voltage signal. It has fast convergence and can handle DC bias/offset. Nevertheless, the performance degrades in the presence of harmonics. In this letter, we propose the application of pre-loop filtering to enhance the robustness of CLO-FLL in the presence of harmonics. Pre-loop filtering slightly increase the computational complexity. However, number of parameters to tune remain the same. The small-signal modeling, tuning and performance comparisons of both techniques are performed in this letter.
LanguageEnglish
Pages(In-press)
JournalIEEE Transactions on Industrial Electronics
Volume(In-press)
Early online date17 Jan 2019
DOIs
Publication statusE-pub ahead of print - 17 Jan 2019

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Tuning
Parameter estimation
Computational complexity
Electric potential

Bibliographical note

© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

Keywords

  • Pre-loop filter
  • Frequency estimation
  • Phase-locked loop (PLL)
  • Frequency-locked loop (FLL)

Cite this

Modeling and Tuning of Circular Limit Cycle Oscillator FLL With Pre-Loop Filter. / Pay, Miao Lin; Ahmed, Hafiz.

In: IEEE Transactions on Industrial Electronics, Vol. (In-press), 17.01.2019, p. (In-press).

Research output: Contribution to journalArticle

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