Abstract: The accurate estimation of rotor angle is an important prerequisite for realizing speed sensorless high

performance vector control of permanent magnet synchronous wind generator. In the speed sensorless control of

permanent magnet synchronous wind generator based on disturbance observer，the traditional angle compensation method is easily affected by the speed estimation error，which reduces the rotor angle estimation accuracy. In order to solve this problem，a new rotor angle compensation strategy was proposed. By constructing a low-pass filter with the same cut-off frequency as the observer，the angle error generated by the low-pass filter was equal to that of the observer，so as to realize more accurate compensation for the estimated rotor angle. In addition，the accuracy of the back EMF was affected by the estimated speed and flux，and then the effect of traditional deadbeat control was affected. Therefore，the amplitude and angle of the observed back EMF were compensated to eliminate the influence of motor estimated speed and flux on the control system in deadbeat control. The experimental results verify the effectiveness of the method.

      Key words: permanent magnet synchronous wind generator； speed sensorless； disturbance observer；

deadbeat control