Fuzzy Active Disturbance Rejection Control of V2G Vehicle-Mounted Bidirectional CLLC Resonant Converter

Abstract

Aiming at the problems of large voltage fluctuation and weak robustness of V2G (vehicle to grid) vehicle-mounted bidirectional CLLC resonant converter under the traditional control algorithm, A double closed-loop control algorithm is proposed, in which the PI controller is used in the inner current loop and the fuzzy linear active disturbance rejection controller (Fuzzy-LADRC) is used in the outer voltage loop. Firstly, the operating mode of the CLLC resonant converter is analyzed, and the voltage gain equation is established by using the fundamental wave analysis method. A Fuzzy-LADRC controller was designed with the inner ring as the controlled object, and adaptive tuning of the linear active disturbance rejection controller proportional gain coefficients was realized by Fuzzy reasoning. The simulation results show that compared with PI control, Fuzzy-LADRC can better observe and overcome the influence of load disturbance on the system output, and the response speed and anti-interference ability are significantly improved.