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

Energies

Yi-Feng Wang¹  Liang Yang¹  Cheng-Shan Wang¹  Wei Li¹  Wei Qie²  Shi-Jie Tu³ 

[1] School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China; E-Mails:;State Grid Tianjin Electric Power Company, Tianjin 300072, China; E-Mail:;State Grid Jiangxi Electric Power Company Repair Branch, Jiangxi 330000, China; E-Mail:

关键词: high step-up;    three-phase AC/DC converter;    rectifier;    flyback;    switched capacitor;   

DOI  :  10.3390/en8042742

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.