电压源型三相逆变器的模型预测控制策略

为了提高电压源型三相逆变器的控制性能,设计了一种新颖的模型预测控制(MPC)策略.新型MPC控制器使用三相逆变器系统的离散时间域模型来预测所有可能电压矢量生成的负载电流,并选择使所设计的成本函数最小的矢量作为最优矢量输出.成本函数中主要考虑的指标是下一个采样周期的电流误差.利用仿真软件和搭建的三相逆变器样机测试平台开展...

Model Predictive Control Strategy for Voltage Source Three-phase Inverters

In order to improve the control performance of voltage source three-phase inverters,a novel model predictive control(MPC)strategy was designed.The new MPC controller used a discrete-time model of the threephase inverter system to predict the load current generated by all possible voltage vectors.The voltage vector which minimizes the designed cost function was selected as optimal vector for output.The primary consideration in the cost function was the current error for the next sampling period.The comparative simulations with the traditional hysteresis control and pulse width modulation scheme and experiments were carried out using the simulation software and the built-in three-phase inverter prototype test platform.The experimental results show that the new MPC controller can effectively control the load current and exhibit better dynamic and static performance.