Sensorless Control of Permanent Magnet Generator in Wind Turbine Application

This paper discusses a new and simple speed estimator, to be used by a permanent magnet generator, for maximum power tracking in a small size variable speed wind turbine. Moreover, a vector control approach is introduced to control the output voltage and current of a single-phase voltage source inverter, such that the active and reactive power can be controlled independently. Using the proposed speed estimator, system only needs two measurements to estimate the generator speed and implement the maximum power-tracking algorithm. Accuracy of the speed estimator is verified by simulation and experimental results