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This paper presents a sensor-less maximum power tracking (MPT) pitchcontroller for grid connected Wind Turbine (WT). The main advantage of theproposed architecture is that the approach ensures smooth operation and thusminimizes the mechanical stress and damage on the WT during high wind speed andgrid transient conditions. Simultaneously, it also: a) reduces transients inPoint of Common Coupling (PCC) bus voltage, b) reduces rotor speedoscillations, and c) controls the output power of the wind turbine withoutexceeding its thermal limits. The approach can work without wind speedmeasurements. In order to consider the effect of grid variations at the PCC,the affected area in the grid is modeled as a study area (area of interest),and remaining area (external area) is modeled as frequency dependent reducedorder model (FDROM). The reduced order model (ROM) is then used to estimate thereference speed. The proposed controller is designed using the error betweenactual speed of the generator and the reference speed, to ensure smoothoperation and limit the speed and aerodynamic power at the rated values. Thearchitecture is evaluated using wind farm integrated Kundur's two-area andIEEE-39 bus test systems using real-time digital simulator (RTDS).

Sensorless Real-Time Reduced Order Model Based Adaptive Maximum Power Tracking Pitch Controller for Grid Connected Wind Turbines