Wind velocity and rotor position sensorless maximum power point tracking control for wind generation system

Grid-integrated permanent magnet synchronous generator based wind energy conversion systems: A technology review

“…On the other hand, the PMSG based WECSs [27,57,83,137,164,188] implement MPPT control algorithms with an instantaneous speed or torque control reference for different wind speed conditions using a generator-speed sensor. The problems associated with the use of mechanical speed sensors such as extra hardware cost, hardware complexity and increased failure rate [14,38,63,174,178,189] can be resolved by adopting optimal position/speed sensorless control strategies; a variety of which have been reported for WECSs with different power electronic converters [151,159,179,190,191]. Because of the intermittent nature of wind power, the operating conditions of a WECS always vary from time to time [14].…”

“…In addition, inaccuracy may arise with low-voltage signal measurement at lower speed, especially in case of directly-driven PMSGs. Consequently, the precise estimation of rotor position and speed is very difficult [193][194][195][196].…”

Maximum power point tracking control without Anemoscope in Wind Energy Conversion System

“…A is the wind turbine rotor swept area , is the wind speed and is the air density. The tip ratio is give by ( 2 ) where r is radius of the turbine, is the angular speed [6]. The energy extraction has the maximum efficiency when the turbine is operating at the optimum tip ratio.…”

Wind speed estimation based control of Stand-Alone DOIG for wind energy conversion system

“…But it can not accurately measure the wind speed, because of the nonnegligible blade pitch angle, power losses and complex shaft system dynamics of the wind turbine generator (WTG). [10] has used a full order observer for the estimation of rotor position, rotor speed and turbine output toque. But it was developed by neglecting the power coefficient, tip speed ratio and pitch angle of wind turbine.…”