Research on double-close-loop fuzzy controlled SVPWM VSR for EV charger

To limit grid side harmonic and increase power factor of EV charger, A SVPWM based voltage-source rectifier (VSR) control method is presented in this paper. Basing on regular double-close-loop control strategy, Fuzzy-Pi control algorithm is adopted in the inner current loop besides traditional PI algorithm being used in outer voltage loop. By taking the double-close-loop fuzzy control method, the PI parameters can be intelligently adjusted. Thereby, in the course of entire charging, the EV charger can hold its power factor and limit its harmonic to the requirement of grid operator. Designing approach to parameter of control component is put forward. Simulating results verified the feasibility of fuzzy-PI controlled SVPWM VSR.