In this paper

a kind of active power filter control system based on proportional complex integral controller under dq rotating coordinated system is proposed with purpose of improving effectively compensation ability of active power filter.For the higher positive sequence 7th order harmonic component and negative sequence 5th order harmonic component which are generated in the three-phase uncontrolled rectifier circuit and such feature as the positive and negative component changing into the 6th harmonic component under dq coordinated system

the zero steady error tracking of since wave signal can be achieved by the use of proportional complex integral control and

on the basis of traditional PI control

parallel the proportional complex integral control so to propose a kind of proportional complex integral current control algorithm and give detailed design method of the controller.The effectiveness and superiority of the proposed over the traditional PI control and proportional resonance control

is verified by the simulation result.