Wind energy is derived from solar energy. As a result of irregular heating of the earth's surface by the sun, air currents are created which flow between areas of differing temperature. The wind power which these air currents generate can be converted...
Wind energy is derived from solar energy. As a result of irregular heating of the earth's surface by the sun, air currents are created which flow between areas of differing temperature. The wind power which these air currents generate can be converted in a rotational motion via a wind turbine. This motion can be harnessed for human energy needs.
In this thesis, steady state and transient response of dual rotor wind turbine generator system is proposed. And performance analysis based on aerodynamic force by rotor blade, system dynamic modeling, generator and pitch control logic. The wind turbine is treated as a collection of rotor blade, high and low speed shaft, generator and gear system. Blade Element-Momentum Theory is used to evaluate the characteristics of dual rotor wind turbine generator system and multi-body dynamics is used to modeling dual rotor wind turbine generator system. Computer program is developed using FORTRAN to implement the proposed modeling method and is used to investigate the system response of dual rotor wind turbine generator system. Closed-Loop type pitch control strategy is established for prevent a generator over running when higher than rated wind speed is applied and for a leveled power output. And its efficiency is tested by non-linear simulation program.