Comparison of two three-phase pll systems for more electric aircraft

Bifaretti, Stefano; Zanchetta, Pericle; Lavopa, Elisabetta

Abstract

The More Electric Aircraft power system is characterized by variable supply frequency, in general between 360Hz and 900Hz. All equipment on board the aircraft have to operate delivering high performance under this variable frequency condition. In particular, power electronic converters need accurate control algorithms able to track the fundamental phase and frequency in real time, both in normal and unusual conditions. Phase Locked Loop (PLL) based algorithms are commonly used in traditional single and three phase power systems to provide phase and frequency estimations of the supply. Despite the simplicity of those algorithms, large estimation errors can arise when power supply voltage has variable frequency or amplitude, presents unbalances or is polluted with harmonics. To improve the quality of the phase and frequency real-time estimations, a robust PLL algorithm, based on a prediction-correction filter, is presented in this paper and compared with a Discrete Fourier Transform (DFT) based procedure. The performances of the two algorithms, implemented in a floating-point DSP, have been compared through an experimental validation obtained on a laboratory power converter prototype.

Citation

Bifaretti, S., Zanchetta, P., & Lavopa, E. (2014). Comparison of two three-phase pll systems for more electric aircraft. IEEE Transactions on Power Electronics, 29(12), https://doi.org/10.1109/TPEL.2014.2307003

• Journal Article Type: Article
• Acceptance Date: Feb 4, 2014
• Online Publication Date: Feb 25, 2014
• Publication Date: Dec 1, 2014
• Deposit Date: Jun 30, 2016
• Publicly Available Date: Jun 30, 2016
• Journal: IEEE Transactions on Power Electronics
• Print ISSN: 0885-8993
• Electronic ISSN: 1941-0107
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 29
• Issue: 12
• DOI: https://doi.org/10.1109/TPEL.2014.2307003
• Keywords: Aircraft; Aircraft control; Algorithms; Delay circuits; Discrete Fourier transforms; Electric power systems; Phase locked loops; Power converters; Aircraft power systems; Experimental validations; Large estimation errors; More electric aircraft; Phase estimation; Phase Locked Loop (PLL); Power electronic converters; Three-phase power systems; Frequency estimation
• Public URL: https://nottingham-repository.worktribe.com/output/993445
• Publisher URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6748104
• Additional Information: 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.
• Contract Date: Jun 30, 2016