Current forecasting dead-beat control method of Z source type interconnected inverter and control device thereof

The invention relates to a current forecasting dead-beat control method of a Z source type interconnected inverter and a control device thereof, which belongs to the field of electrical energy conversion and is used for interconnected power generation. The current forecasting dead-beat control method overcomes the defect of sampling delay of the conventional control method. In each sampling period, a robust prediction algorithm is adopted to forecast interconnected current of the next period, and the needed inverted voltage is calculated according to a voltage equation of the inverter to realize the deadbeat control of the interconnected current. A single-voltage space vector modulating method with a through zero vector is used for generating a through-state pulse-width modulation wave shapes of the inverted voltage to control the DC capacitance voltage and the interconnected inverted voltage. The control device comprises a central processing unit, a synchronous signal generating circuit, a voltage and current testing circuit and an isolated driving circuit. The current forecasting dead-beat control method of the Z source type interconnected inverter has high control precision, is easy to digitally realize, has stronger inverted-side inductance parameter variation robustness, and the like.