Abstract
All-pass filter (APF) passes all frequency components of a signal without altering their amplitude, but changes their phase. This feature has made the APF a versatile building block in different signal processing applications. The focus of this article is on APF-based phase-locked loops (PLLs), where the APF is required for creating a 90° phase shift at the fundamental frequency. Such a phase shift is needed for generating a fictitious orthogonal signal in single-phase applications and rejecting the grid voltage imbalance in three-phase systems. To the best of authors' knowledge, none of the APF-based PLLs have an accurate model yet. This gap in knowledge makes the analysis of these synchronization systems and identifying their advantages/disadvantages compared to state-of-the-art structures complicated. The main objective of this article is to bridge this knowledge gap.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 8818308 |
| Tidsskrift | IEEE Transactions on Power Electronics |
| Vol/bind | 35 |
| Udgave nummer | 4 |
| Sider (fra-til) | 3558-3572 |
| Antal sider | 15 |
| ISSN | 0885-8993 |
| DOI | |
| Status | Udgivet - apr. 2020 |
Bibliografisk note
Funding Information:Manuscript received May 14, 2019; accepted July 15, 2019. Date of publication August 27, 2019; date of current version January 10, 2020. This work was supported by the Deanship of Scientific Research, King Abdulaziz University, Jeddah, under Grant RG-9-135-38. Recommended for publication by Associate Editor R. Burgos. (Corresponding author: Saeed Golestan.) S. Golestan, J. M. Guerrero, and J. C. Vasquez are with the Department of Energy Technology, Aalborg University, Aalborg DK-9220, Denmark (e-mail: sgd@et.aau.dk; joz@et.aau.dk; juq@et.aau.dk).
Funding Information:
The authors acknowledge with thanks DSR technical and financial support.
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