动态矩阵的三相并网逆变器抗扰动控制方法

为解决传统PI控制不足，有效降低电网电流谐波畸变率，提出一种基于动态矩阵的三相并网逆变器抗扰动控制方法。该方法通过阶跃响应法建立三相LCL并网系统的预测模型，设计LCL滤波器参数保证系统的稳定性,选择并网电流作为控制对象，设计动态矩阵滚动优化目标函数和反馈校正环节，以控制增量的形式对SVPWM调制波的调制比进行预测控制。仿真结果表明，在外界较大扰动下，与PI控制相比，基于动态矩阵的控制方法可将并网电流谐波畸变率降低134%，具有更好的抗扰动性

Anti Perturbation Control of Three Phase Grid Connected Inverter of Dynamic Matrix

To increase the shortage of traditional PI control and reduce the grid current harmonic distortion rate,a dynamic matrix based three phase grid inverter is proposed.This method establishes a prediction model of three phase LCL grid connected system through step response,designs the LCL filter parameters to ensure system stability,selects the grid connected current as the control object,and designs the dynamic matrix rolling optimization target function as well as feedback correction link,so as to predict the modulation ratio of SVPWM modulation waves in the form of control increment.Simulation analysis has found that under large external perturbations,dynamic matrix based control methods can reduce the mesh current harmonic distortion rate by 1.34%,pertaining better perturbation compared to PI control.