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International Journal of Antennas and Propagation
Volume 2012, Article ID 176830, 5 pages
http://dx.doi.org/10.1155/2012/176830
Application Article

Avoidance High-Frequency Chattering Second-Order Sliding Mode Controller Design: Buck Converter in Wind Power System

1School of Automation, Northwestern Polytechnical University, Xi'an 710072, China
2University of Technology Belfort-Montbeliard, 90000 Belfort, France

Received 15 August 2012; Accepted 8 October 2012

Academic Editor: Fuli Zhang

Copyright © 2012 Yigeng Huangfu et al. 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.

Abstract

This paper mainly discussed a method of high-frequency second-order sliding mode control for Buck converter in wind power systems. Because the wind energy of nature is always unpredictable and intermittent, the robust control such as sliding mode control is adopted in past literatures. In order to remove the high frequency chattering problem when the traditional sliding mode achieves convergence, the second order sliding mode algorithm is reviewed firstly. Meanwhile, the Buck converter taken as a step-down converter is usually adopted in wind power system, because of its simple structure and good linearity. Under those conditions, the second order sliding mode controller is designed based on Buck converter, especially in high-power wind generation system. The experimental results illustrate that the theory of second order sliding mode can be used in high-power Buck converter. It provides one novel avoidance high frequency chattering method for the technology development of new energy generation system.