基于自适应预测算法的谐波电流无差拍控制

Harmonic Dead-Beat Control Algorithm Based on Adaptive Predictor

基于单相并联有源电力滤波器,提出一种无差拍控制策略。随着数字控制技术的发展,无差拍控制在有源电力滤波器控制中的地位越来越重要。虽然该技术响应快、精度高,但由于采样以及处理器计算的延时,系统容易不稳定。文中提出了一种自适应预测算法,可预测两个采样周期后的参考电流,有效消除延时,保证系统稳定性。无差拍控制与自适应预测结合使用,可有效降低稳态时各次谐波电流的含有率和电流总谐波畸变率,并在负载变化时能快速跟踪上谐波电流的变化。通过仿真在单相并联有源电力滤波器上实现了该算法,并将其与线性预测方法进行了比较,证明了它具有精度高、响应快的特点。

A deadbeat current control algorithm based on shunt single-phase active power filter is presented.With the development of digital control,deadbeat control is becoming more and more important in the active power filter control.Although it has the high ability of its accuracy and responsiveness,the system might be destroyed because of the delays caused by the calculation of processor and sampling.An adaptive predictor is introduced to predict the reference current two sampling periods ahead which can cancel t...