Current source rectifier based on fuzzy two closed loop control system

The LC filter introduced to the AC side of three-phase current source PWM rectifier, brought leading power factor. In addition, because of the nonlinearity of the PWM rectifier, the satisfactory effect could not be obtained with the traditional PID control system under larger disturbance and changes of controlled object. This paper described the technology of Combining traditional PID control with fuzzy control, and proposed a kind of current source rectifier(CSR) based on fuzzy two closed loop control system. The three-phase current source PWM rectifier was simulated under the MATLAB/SIMULINK environment. Simulation results show that the current source rectifier´s AC side could run at nearly unity power factor and the rectifier could obtain stable output AC current. Therefore it´s one kind of ideal control strategy.