High Robustness Control Application in Single Phase Rectifiers

Voltage-current double closed-loop control, based on the d-q coordinate system, is a widely employed linear control strategy for single-phase PWM rectifiers. However, it inherently represents a nonlinear system. To address the issues of suboptimal dynamic responses and potential failures under certain disturbances, an enhanced sliding mode control (SMC) method is introduced and integrated into the voltage-current double closed-loop control system. This proposed approach not only enhances dynamic response characteristics but also improves system robustness, resulting in superior control performance. Experimental and simulation results presented in this paper affirm the effectiveness of the proposed method.