FBD算法电流检测的滞后误差建模

Modeling of the Delay Error of Current Detection Based on FBD Algorithm

作为有源滤波器运行的一个重要环节,电流检测的结果决定了有源滤波器的工作性能。常用电流检测方法的结果都存在一定的滞后误差。本文对FBD法电流检测过程进行了分析,指出了造成滞后误差的原因,并且建立了定量分析的模型,推导出了计算公式。在此基础上提出了通过引入校正环节和减少计算量的方法改进FBD算法,从而减少电流检测的滞后误差,并通过仿真和试验对该方法进行了验证。该方法对于减少电流检测的滞后误差,提高补偿效果具有明显的意义。

As an important factor of （active power filter, APF） , current detection results decide the performance of APE The effect of time delay of the normal method leads to the measure error （delay error）. Based on the research of the FBD algorithm process, the reason of the delay error is pointed out in this paper. Founded on the analysis of FBD theory, the mathematical model of theoretical evaluation and the compute formula are also given. An ameliorated FBD method is proposed by using the emendation net and reducing the calculation to decrease the delay error of the current detection, At last, this method is verified by the simulation and experiments. The proposed method in this paper has significance to reducing the current detection delay error, and increasing the compensation performance.