In order to overcome the influence of physical parameters perturbation on the output power quality of three-phase voltage source PWM rectifier and to improve the dynamic response speed

in this paper

the dynamic mathematical model of parameter perturbation of PWM rectifier is analyzed and set up and

on the basis of the non-linear system Lyapunov theory

a kind of robust adaptive control strategy is proposed and the stability of the control system is strictly deducted and demonstrated.It is shown by the simulation result that compared to the traditional feed forward de-coupling control method and in case of bigger perturbation of physical parameter

the system can still maintain good stability and the input current harmonic is less.In case of sudden variation of lad power

the new control method can reduce the voltage overshoot and shorten the stabilization time of the system.The new control method has the better ability to stabilize the system and suppress the outer interference.