The invention discloses a nondelay control method for the current of the rotor of the variable speed
constant frequency double feed nonsynchronous aerogenerator(DFIG). The switch of the rotational coordinate is finished by collecting
three phase rotor current
signal so as to obtain the rotor current feedback amount in the static frame of axes to compare with the rotor current command in the
stator static frame of axes, the difference
signal is input into the proportion-
resonance regulator for comparison, the rotor
voltage reference value in the
stator static fame of axes is obtained after feedback compensation decoupling. The rotor
voltage reference value is then transformed into reference signals for
space vector pulse width regulation in the rotor frame axes to generate switch signals of the power components of the converter of the rotor to control the synchronize and close operation of the generator. The invention is needless of the break down of the positive and negative sequence of current of the EFIG rotor no matter the electric net
voltage is balance or not without introducing break down
delay. The invention can realize strengthened control of the generating
system in imbalanced electric net, effectively improve non-stop operation of the aerogenerator.