本文提出了一种新型的控制策略,将模型预测(Model Predict Control,MPC)控制应用于PWM整流器的直接功率控制(Direct Power Control,DPC)中。这种控制方法是在开关频率固定的情况下以功率误差最小为原则来选择最佳的电压矢量。此外,还设计了控制延时补偿方案,用以消除控制延时所产生的功率误差。实验结果表明这种控制策略不仅实现了网侧电流正弦化和单位功率因数,而且还获得了更好的稳态性能和更快的动态响应速度。该控制策略以新颖的方法实现了定频直接功率控制,简化了整流器系统参数的设计。
英文摘要:
This paper proposes an improved direct power control (DPC) for the PWM rectifier by using model predictive control (MPC). This method is based on the principle of minimizing power error to choose the best vector. This control system designs the control delay compensation scheme, which is used to eliminate the power error produced by control delay. Results show that this strategy not only achieves the sine current and the unity power factor, but also obtains a better steady performance and a faster dynamic response. This strategy achieves the fixed switching frequency and simplifies the design parameters of the rectifier system.