Abstract
For the Vienna rectifier controlled by traditional strategies, the setting time of DC output voltage response is too long and the steady-state error is too big. Also, the grid current-harmonic quantity is too large. A double closed loop sliding mode PIR (proportional integral resonant) control strategy is proposed in this paper to solve the problems mentioned above. The sliding mode control is used in the outer voltage loop to achieve accurate and fast tracking of the voltage reference. PIR control which consists of PI (proportional integral) control and PR (proportional resonant) control is applied in the inner current loop to reduce current harmonic. The mathematical model is established based on the main circuit topology of the Vienna rectifier firstly. Then sliding mode control algorithm and PIR controller are designed. Finally, the circuit model is built in MATLAB/Simulink, and the effectiveness of sliding mode PIR control is verified through simulation results.
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