Z源逆变器的状态反馈控制策略

State feedback control strategy of Z-source inverter

为研究针对于Z源逆变器的直通零矢量和调制因子的统一控制方法,应用状态空间平均法在不忽略Z网络电感电阻的情况下对带感性负载的Z源逆变器进行统一的建模分析,并给出完整的数学模型。在此数学模型的基础上,依据非线性控制理论,结合状态反馈控制方法设计完整的控制模型,并且给出具体的控制矩阵参数和对系统的硬件平台进行简单介绍。这种控制方法直接对直通零矢量和调制度进行统一的计算控制,仿真与实验结果表明通过对直通零矢量和调制度的统一控制,使系统具有跟踪快速准确,超调量小的特点。

In order to research an united control method for modulation index and shoot through duty ratio of Z-source inverter, a complete average model for the Z-source inverter with inductive load without ignoring the inductor resistance in the Z-source network is analyzed and presented using state space averaging. Furthermore, based on this model and nonlinear control theory, a complete controller is designed applying state feedback control method, presenting the detailed parameters of the control matrix and the hardware platform is also simply introduced. This method conducts united control with the shoot through duty ratio and modulation index directly. The simulation results and the experimental results proved that the controller has the characteristic of fast and accumte tracing and small over-shoot by conducting united control with the shoot through duty ratio and modulation index directly.