三电平三相逆变器快速有限控制集模型预测控制方法

针对有限控制集模型预测控制方法在多电平多相逆变器中预测模型和目标函数在线计算量大的不足,提出一种快速有限控制集模型预测控制方法。该方法根据参考矢量的空间位置,让远离参考矢量的电压矢量不参与预测模型在线计算和目标函数在线评估。对于三电平三相逆变器,快速有限控制集模型预测控制方法使参与计算的电压矢量由27个减少到12个,大大提高计算效率。最后,建立起5 k W二极管钳位型三电平三相逆变器实验平台。对于传统有限控制集模型预测控制和快速有限控制集模型预测控制进行对比稳态和动态实验。实验结果表明:所提出快速有限控制集模型预测控制方法使系统具有良好的静、动态性能。

Fast finite control set model predictive control method for three-level three-phase inverters

Due to large online calculation of predictive model and cost function when using finite control set model predictive control ( FCS-MPC) in a multi-level multi-phase inverter, a fast FCS-MPC method is proposed in this paper.The voltage vectors far away from the reference vector did not participate in online calculation of predictive model and cost function for the FCS-MPC method, which made the calculated voltages decrease from 27 to 12 and improve the calculation efficiency.At last, a diode-clamped three-level three-phase inverter experimental platform rated at 5 kW was established.The comparative steady-state and dynamic experimental waveforms for the conventional FCS-MPC method and the fast FCS-MPC method were studied.The experimental results show that the proposed fast FCS-MPC algorithm has good steady-state and dynamic performance.