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Degree

Master of Science, Ohio State University, Electrical and Computer Engineering, 2009.

Abstract

The global electrical power demand is steadily increasing. The absolute dependence of conventional energy resources such as oil, coal or natural gas to meet this demand is problematic for many reasons: its environmental impacts such as pollution and global warming caused by greenhouse emissions, the rising and unstable prices for fossil fuels and for some nations energy security is considered as indispensable part of the national security.Therefore, renewable energy technologies have been playing a key role in the worldwide electrical power production. The advancement of power electronics in terms of efficiency and functionality along with their declining cost all have increased the contribution of renewable energy systems in the electricity generation and solved significant problems in integrating those technologies with existing power systems . Among renewable wind energy is the fastest growing, however world has abundant amount of usable wind energy which has not been utilized. This thesis firstly discusses the contributions of some conventional energy sources in electricity generation , then it covers essential topics about wind turbine systems such as the power content of wind , the components and operation of wind turbine system , power and speed control methods implemented in modern turbine systems and the electrical systems for wind turbines with focus on generators and power converters used. Finally, it deals with the core topic which is the bi-directional three-phase power converter using pulse width modulation (PWM). PWM techniques in power converters are gaining importance especially for harmonics control. The thesis presents the mathematical modeling of the converter and a computer simulation for its operation using Matlab/Simulink , then the analysis of the input/output characteristics is presented.

Subject Headings

Electrical engineering

Keywords

wind power; wind turbine; bidirectional converter

Committee / Advisors

Ali Keyhani, Prof. (Advisor)
Donald Kasten, Prof. (Committee Member)

Pages

141p.

Document number: osu1259684130
Permalink: http://rave.ohiolink.edu/etdc/view?acc_num=osu1259684130

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