A nonlinear integrator sliding mode variable structure control, based on traditional integrator sliding mode, was applieed in three-phase voltage-source PWM rectifier(VSR) to improve the robustness of parameter uncertainties load disturbance. And this control strategy contains error and error integral term and makes that three-phase voltage-source PWM rectifier not minimizes chattering and steady state error but has excellent robustness. Then ,integral term is weakened to avoid large overshoots and reduce the state error, which can lead to integral saturation effect (windup). At the same time, a exponential reaching law which can further suppress chatting and improve the reaching speed is presented. The three-phase voltage-source PWM rectifier based on nonlinear integrator sliding mode variable structure control system is superior to traditional integrator sliding mode control and the conventional PI control system in low overshoots, anti-interference and speed tracking by MATLAB simulation analyzing the running data of three-phase VSR.
