预测电流闭环控制方法的研究

Study on the Closed loop Control Method of Predictive Current

研究空间矢量无差拍电流控制方法并将其应用于有源电力滤波器。为了提高指令电流预测的准确性,将预测电流的开环控制改进为闭环控制,并利用Matlab软件对比研究了线性预测算法与抛物线预测算法,从而选择采用抛物线预测法进行基于DSP的有源电力滤波器实验。实验结果证明了该控制方法的可行性与有效性,使有源电力滤波器能很好地抑制主要次谐波。

The deadbeat current control based on space vector was researched,which is used in active power filter （APF）.In order to improve the forecasting accuracy of the reference current,the open loop control of predictive current was improved as the closed loop control.The comparative study of linear prediction algorithm and the parabolic prediction algorithm on Matlab were given,choosing the parabolic prediction for the experiment of active power filter based on DSP.The experimental results prove that the feasibility and effectiveness of the control method.The main harmonics are suppressed well by the APF.