Blade pitch

About: Blade pitch is a research topic. Over the lifetime, 5321 publications have been published within this topic receiving 63134 citations.

Implementation of Pitch Control Of wind Turbine Using Simulink (Matlab)

Abstract:  Abstract— In this paper, it is shown that how the variable speed wind turbine can be used to generate a fixed value of voltage at the output with the help of a pi controller and it is done by varying the pitch angle of the blades Pitch angle control is the most common means for adjusting the aerodynamic torque of the wind turbine when wind speed is above rated speed and various controlling variables may be chosen, such as wind speed, generator speed and generator power As conventional pitch control usually use PI controller, the mathematical model of the system should be known well The block diagram of the proposed speed control system which consists of speed controller, actuator model and the turbine linearized model is simulated by Matlab-Simulink software package the simulation results show that the controller accurately adjusts the blade pitch angle to set the wind turbine power output to its reference value A rotor swept area Cp aerodynamic coefficient of performance air density angle of attack pitch angle of the blade tip-speed ratio rotor-speed

Automatically controlled wind propeller and tower shadow eliminator

Abstract: A propeller hub carries pivotally-mounted blades that are linked to a spring-loaded collar on the propeller shaft for automatic coning and feathering under predetermined high velocity movement along the propeller shaft to change the blade pitch angle during low wind velocity conditions. An airfoil support mounts a propeller shaft and turns therewith to reduce tower shadow effects. This is called a "down-wind system" meaning the propeller is behind the tower and causes the assembly to rotate into the wind without a tail vane.

Classical control of active pitch regulation of constant speed horizontal axis wind turbines

Abstract: Owing to current concern over the environment, there is much interest in renewable sources of electrical power generation of which one of the most promising is wind power. However, it is not yet a mature technology and many basic issues have yet to be resolved. One such issue is the best means of regulating the wind turbines. Many horizontal axis grid-connected wind turbines have the capability to vary the angle of pitch of the blades which can be exploited to provide regulation. The purpose of this paper is to report on an extensive investigation into the control of active pitch regulation of constant speed, grid-connected horizontal axis wind turbines. The performance attainable by PI control design and classical Nyquist-Bode loop shaping is determined and compared

Wind machine with electric generators and secondary rotors located on rotating vertical blades

Abstract: Each vertically rotating blade of a wind-driven main rotor carries a secondary rotor oriented to be driven by the wind during its circular motion about the main rotor axis. The secondary rotors are thus exposed to a much increased relative wind speed and transmit torque to a rotary energy-producing device, such as an electric generator directly coupled to the shaft of the secondary rotor without the necessity of a speed-up transmission. Each secondary rotor may be located, in line with the chords of the main rotor blade, anywhere along said blade but, preferably, in the vicinity of the blade tip.