三相电压型逆变器的模型预测控制

Predictive Control Model of Three-phase Voltage Inverter

三相电压型逆变器中常用的模型预测控制算法是电流预测控制算法,存在着大量计算,导致延时问题,为改进传统的模型预测控制算法,利用外推法推算未来参考变量,达到对其进行延时补偿并能避免受控变量出现较大纹波的效果。建立三相电压型逆变器仿真模型,分析三相电压型逆变器负载电流的输出特性。仿真表明:能够准确跟踪参考电流,解决存在的延时问题,验证了算法的有效性。

The model predictive control algorithm used commonly in three-phase voltage inverter is a current predictive control algorithm and the algorithm needs intensive computations leading to a delay problem. To improve the traditional model predictive control algorithm,extrapolation is used to reckon the future reference variables that are able to perform delay compensation while avoiding larger ripple effect in controlled variables. The simulation model built for three-phase voltage inverter could analyze the output characteristics of the load current in three-phase voltage inverter. Simulation results show that： the algorithm can accurately track the reference current and solve the delay problems; the effectiveness of the algorithm is demonstrated.