Wind Turbine Research Paper

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A wind turbine converts the wind’s kinetic energy into electrical energy with the help of blades i.e. energy of the wind turns the blade which in turn rotates the rotor of the generator. The main shaft, the low-speed shaft is connected to the rotor (5). The rotational speed is increased with the help of drive train components including gears. Finally a high-speed shaft is coupled with a generator (6) which creates the electricity. The major components of a wind turbine-generator system are shown in Fig.2. Figure 2 2 Components of Wid Turbine (7) The wind turbine (WT) is composed of blades, the rotor hub and the nacelle located immediately behind the rotor hub which contains the gearbox, generator and other components like transformer. It is in the nacelle where generated electricity is produced. The rotor nacelle assembly is most important part of the wind turbine since the conversion of kinetic energy is converted into electrical energy…show more content…
the speed of the stator flux is same as that of rotor flux. Wound Rotor Synchronous Generator (WRSG) is also called the Electrically Excited Synchronous Generator (EESG), where it is excitation is done with a coil. While the excitation for the Permanent Magnet Synchronous Generator (PMSG) is provided by a permanent magnet. Both the WRIG and PMSG are also called as Full-size Converter generator (14). Figure 2 6 WRSG based WTs In WRSG the machine side converter (MSC) uses a passive rectifier and the generator is controlled through a excitation control using DC/DC converter in the rotor winding. In case of PMSG the MSC is a fully controllable 4-quadrant converter (16). The frequency converters for both of these generators allow variable speed operation over a wide range, so it enables to attain maximum power generation. Figure 2 7 PMSG based WTs Doubly Fed Induction Generator

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