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

Miao Lin Pay; Hafiz Ahmed

doi:10.1109/TIE.2019.2892677

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

Miao Lin Pay, Hafiz Ahmed

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

118 Downloads (Pure)

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 preloop filtering to enhance the robustness of the CLO-FLL in the presence of harmonics. Preloop filtering slightly increases 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.

Original language	English
Article number	8617680
Pages (from-to)	9632-9635
Number of pages	4
Journal	IEEE Transactions on Industrial Electronics
Volume	66
Issue number	12
Early online date	17 Jan 2019
DOIs	https://doi.org/10.1109/TIE.2019.2892677
Publication status	Published - 1 Dec 2019

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

Frequency estimation
frequency-locked loop (FLL)
phase-locked loop (PLL)
preloop filter

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

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10.1109/TIE.2019.2892677

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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 preloop filtering to enhance the robustness of the CLO-FLL in the presence of harmonics. Preloop filtering slightly increases 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.",

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N2 - 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 preloop filtering to enhance the robustness of the CLO-FLL in the presence of harmonics. Preloop filtering slightly increases 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.

AB - 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 preloop filtering to enhance the robustness of the CLO-FLL in the presence of harmonics. Preloop filtering slightly increases 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.

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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