Simulation Study on Global Fast Terminal Sliding Mode Control of Three-Phase Voltage Source PWM Rectifier

To settle the problems of three-phase voltage source rectifier VSR (Voltage Source Rectifier), which adopts dual closed-loop control systems based on proportional integral (PI) control, such as large startup overshoot voltage, slow dynamic response speed and high current harmonic content, an improved double closed loop Sliding mode control scheme is adopted, that is, the voltage outer loop adopts global fast terminal Sliding mode control, the current inner loop adopts Sliding mode control based on exponential reaching law. Firstly, establishing a mathematical model of three-phase VSR in d-q rotating coordinate system, and then the design process of dual loop Sliding mode control system is introduced at length, finally, simulation comparison results prove the effectiveness of the dual Sliding mode control scheme, and provides a theoretical basis for industrial applications.