LC滤波型三相逆变器有限集模型预测电压控制OA

In order to reduce the total harmonic distortion of three-phase inverter power supply and improve the dynamic response capability,this paper proposes a three-phase inverter with LC filter and designs a finite-control-set model predictive voltage control system.Firstly,LC filter is designed and connected to the output of three-phase inverter in series to reduce the total harmonic distortion of sinusoidal voltage.Next,a discrete-time mathematical model of the three-phase inverter with LC filter is derived to predict the output voltage of the inverter system under possible switching states.Then,a load current estimation strategy based on the filter inductance current and output voltage is developed to compensate for unknown load current in the prediction model.Finally,a cost function is established as a criterion for selecting optimal switch states.The proposed method is simulated and validated in MATLAB/Simulink,and the results prove its effectiveness.