A Novel Phase-Locked Loop Based on Frequency Detector and Initial Phase Angle Detector
- 28 December 2012
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Electronics
- Vol. 28 (10), 4538-4549
- https://doi.org/10.1109/tpel.2012.2236848
Abstract
This paper proposes a new three-phase software phase-locked loop (PLL) that operates fast and accurately in unbalanced, polluted, and frequency deviating circumstances. The proposed PLL consists of a frequency detector and an initial phase angle detector. In the synchronous reference frame, the initial phase angle detector tracks a ramp phase angle, which is generated from frequency deviation of the inputs, with steady error. This detection error is utilized to estimate the actual grid frequency. Frequency adaptive moving average filters (MAFs) are applied in this new PLL to eliminate noises, harmonics, and negative sequence components. In this paper, the effect of discrete sampling on the MAFs is analyzed, and a linear interpolation is employed to enhance the performances of the MAFs. The stability of the proposed PLL is also analyzed, a sufficient stability condition is identified, and the design procedures of the control parameters are also presented. Simulations and experiments verify the performances of the novel PLL.Keywords
This publication has 37 references indexed in Scilit:
- Frequency-Adaptive Stationary-Reference-Frame Grid Voltage Sequence Detector for Distributed Generation SystemsIEEE Transactions on Industrial Electronics, 2010
- Fixed-Reference-Frame Phase-Locked Loop for Grid Synchronization Under Unbalanced OperationIEEE Transactions on Industrial Electronics, 2010
- Multiple second order generalized integrators for harmonic synchronization of power convertersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2009
- Grid synchronization of power converters using multiple second order generalized integratorsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2008
- A Filtering Technique for Three-Phase Power SystemsIEEE Transactions on Instrumentation and Measurement, 2008
- A Robust Phase-Locked Loop Algorithm to Synchronize Static-Power Converters With Polluted AC SystemsIEEE Transactions on Industrial Electronics, 2008
- Processing of Symmetrical Components in Time-DomainIEEE Transactions on Power Systems, 2007
- Control of back-to-back-connected neutral-point-clamped converters in wind mill applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- Update on IEC 61000-3-6: Harmonic Emission Limits for Customers Connected to MV, HV, and EHVPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- A novel three-phase magnitude-phase-locked loop systemIEEE Transactions on Circuits and Systems I: Regular Papers, 2006