关键词: 预测控制, 采样时间, 逆变电路, 电压矢量

Abstract: To aim at the requirement of low total harmonic distortion (THD) in the aviation inverter, an improved finite set model predictive control method is proposed based on the mixed logical dynamical (MLD) model to the new inverter circuit. In a control period, the original 8 voltage vectors are combined with the other one to increase the number of vectors, and the switch states corresponding to the minimum objective function value is selected as the input to reduce the error between the reference voltage and the output voltage. At the same time, by optimizing the objective function and increasing the control period, the influence of long sampling time and calculation time on the switch state selection is overcome. This method reduces the THD of output voltage and has good dynamic and static characteristics, Simulation and experiment verify the effectiveness of the proposed method.

Key words: Predictive control, sampling time, inverter circuit, voltage-vector