数字化三相大功率逆变波形内模控制方法

摘要

针对三相逆变电源数学模型在旋转αβ坐标系下的特点,提出了基于神经网络内模原理的逆变波形控制方案.用神经网络预估器作为逆变器的内部模型,用神经网络辨识预估逆变器正模型及其逆模型,在线修正、补偿内部模型与被控逆变器之间的模型失配.仿真和实验结果表明,该方案控制下系统稳压精度高,有较快的动态响应.%According to the characteristic of three-phase inverter based on a(I rotating frame, this paper presented a control scheme of inverter output waveform control based on neural network internal model theory. The control scheme took a neural network estimate model as the internal model of three-phase inverter to estimate the actual output waveform. The simulation and experiment verify the scheme can work well.Highly accurate steady output,fast response and less distorted waveform is gamed.