Title: Fuzzy PLL for three-level neutral point clamped active rectifiers

Authors: Hany A. Hamed; Ehab H.E. Bayoumi; E.E. EL-Kholy

Addresses: Electrical and Automation Department, Emirates Steel, Abu Dhabi 9022, UAE ' Department of Electrical and Electronics Engineering Technology, Abu Dhabi Men's College (ADMC), Higher Colleges of Technology, Abu Dhabi 25035, UAE ' Department of Electrical Engineering, Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egypt

Abstract: This paper proposes a new design of synchronous reference frame phase locked loops-based fuzzy logic control employed for three-level medium voltage neutral-point-clamped rectifiers. Systematic methods to design the conventional PLL-based PI controller is introduced for standard order and high order models. A synchronous reference frame PLL incorporating fuzzy logic controller is established to replace the conventional PI controller. A comparative analysis is presented to examine the advantage of implementing fuzzy logic controller hostile to classical controller. Moreover, a detailed design of input filters and its influence in rectifier operation is investigated. The harmonics generated by rectifier back to grid under unbalance grid voltage due to dip is explored. Simulation results and experimental measurements of the real industrial type rectifier system validate the proposed technique and highlight its practicability.

Keywords: three level converters; phase locked loop; synchronous reference frame PLL; active rectifiers; fuzzy logic controllers; FLC; fuzzy control; controller design; harmonics; simulation.

DOI: 10.1504/IJIED.2015.072801

International Journal of Industrial Electronics and Drives, 2015 Vol.2 No.3, pp.170 - 190

Available online: 27 Oct 2015 *

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