No-model prediction current control method for two-level inverter

The invention relates to a no-model prediction current control method for a two-level inverter. The method comprises the following steps that: firstly, according to load current obtained at a currentsampling moment and a current difference vector obtained by calculation, carrying out two-step prediction on the load current; then, combining with a vector angle compensation method to estimate the future value of reference current; and finally, carrying out on-line evaluation on eight switching states of the two-level inverter, selecting the switching state which enables a cost function to be minimum to be applied to a next sampling period. By use of the method, when the load parameter of the inverter changes, good control performance can be kept, output current accurately tracks a given value, and therefore, the method has better parameter robustness and a higher practical engineering application value. 本发明涉及一种两电平逆变器的无模型预测电流控制方法。首先根据当前采样时刻得到的负载电流与计算得到的电流差分矢量对负载电流进行两步预测；然后结合矢量角补偿法来估算参考电流的未来值；最后，对两电平逆变器的8个开关状态进行在