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Energies 2015, 8(4), 2742-2768; doi:10.3390/en8042742

High Step-Up 3-Phase Rectifier with Fly-Back Cells and Switched Capacitors for Small-Scaled Wind Generation Systems

1
School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China
2
State Grid Tianjin Electric Power Company, Tianjin 300072, China
3
State Grid Jiangxi Electric Power Company Repair Branch, Jiangxi 330000, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 26 November 2014 / Revised: 7 March 2015 / Accepted: 1 April 2015 / Published: 10 April 2015
(This article belongs to the Collection Wind Turbines)

Abstract

This paper proposes and discusses a novel AC/DC converter suitable for small-scaled wind power generation system applications. By introducing flyback cells into the three-phase single-switch Boost circuit, the proposed converter is designed as single-stage and has both rectification and high step-up power conversion functions. It is able to obtain high voltage gain at low input voltage level, and high efficiency, low total harmonic distortion (THD) at rated power. The inherent power factor correction (PFC) is also determined, and can reach 0.99. Besides, since no electrolytic capacitor is employed and high voltage gain is achieved, the converter can also collect weak power at low input voltage in combination with energy storage devices, and contribute to a better low-wind-speed/low-power performance. Finally, a 400 W prototype is built to verify the theoretical analysis, and its efficiency is 87.6%, while THD is 7.4% at rated power. View Full-Text
Keywords: high step-up; three-phase AC/DC converter; rectifier; flyback; switched capacitor high step-up; three-phase AC/DC converter; rectifier; flyback; switched capacitor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, Y.-F.; Yang, L.; Wang, C.-S.; Li, W.; Qie, W.; Tu, S.-J. High Step-Up 3-Phase Rectifier with Fly-Back Cells and Switched Capacitors for Small-Scaled Wind Generation Systems. Energies 2015, 8, 2742-2768.

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