Dual small versus single large DC generators for residential size wind turbine applications

Michael D Melvin, Purdue University

Abstract

Capturing and harnessing power from the wind has become very important in recent years due to environmental benefits of utilizing a renewable energy source for power production. Since the wind speed is not constant, it is important to maximize the efficiency of the wind turbine generator over a range of wind speeds to convert as much kinetic energy into electricity as possible. In order to quantify performance, software was used for modeling and simulating of the wind turbine generator system. In this thesis, a dual Direct Current (DC) generator system was compared to a larger single DC generator system to determine which system would provide the maximum efficiency. Both systems were modeled using Simulink. The DC generator models were first verified in the laboratory environment with electric machines from which all of the electrical and mechanical characteristics were known. Having a working electric machine model, two PM (Permanent Magnet) DC electric machines were chosen from the same manufacturer. The first electric machine chosen was used for the dual generator system; it had a power output rating of 430 watts. The second electric machine chosen was used for the single generator system; it had a power output rating of 700 watts. The two systems were modeled and tested for a range of input torque load values, which simulated the energy from the wind. The results of the small dual generator system versus the large single generator system were discussed and evaluated.

Degree

M.S.E.

Advisors

Kozel, Purdue University.

Subject Area

Electrical engineering

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