电压型PWM整流器模型预测直接功率控制

Model Predictive Direct Power Control for Three-Phase Voltage Source PWM Rectifiers

对电压型PWM整流器进行了数学建模,然后在两相静止坐标系下建立了预测功率模型,在此基础上提出了优化的模型预测直接功率控制(model predictive direct power control,MPDPC)策略。该方法用电网电压矢量作为基本控制矢量,利用功率预测模型和功率误差最小原则,得出目标控制电压矢量公式,结合空间矢量脉宽调制实现模型预测功率控制。同时针对实际系统中的一步延迟设计了延时补偿方案。此外,在系统中引入重复控制对每个采样周期系统的有功、无功功率进行优化。仿真和实验验证了表明所提出的方法的可行性。

Mathematical modeling of voltage source PWM filter is conducted and a predictive power model under two-phase rest frame is established,on this basis an optimal model predictive direct power control（MPDPC） strategy is proposed.In the proposed control strategy the voltage vector in power supply system is taken as the basic control vector and utilizing power directive model and minimum power error principle the formula of objective control voltage vector is obtained,then combining with space vector PWM modulation（SVPWM） the model predictive direct power control is implemented.Meanwhile,considering the step delay in actual control systems a delay compensation scheme is designed.Besides,the repetitive control is led in to optimize the active and reactive power in each sampling cycle.The feasibility of the proposed control method is validated by results of simulation and experiments.