基于自适应逆控制的有源滤波器输出波形校正

The Current Waveform Correction Algorithm for APF Based on Adaptive Inverse Control

传统的控制系统在设计过程中,需要在动态性能和扰动抑制之间进行一些折衷。自适应逆控制为基于前馈的开环控制,采用特别的反馈结构,可以消除对象的扰动而不改变对象的动态特性,使动态特性控制和对象扰动控制成为两个单独的过程,可以进行独立设计,这个特点也是自适应逆控制的最大优势。论文将自适应逆控制理论应用于有源滤波器(APF)中,用来控制电压源型逆变器输出电流波形的校正。仿真、实验结果验证了理论分析的有效性。

Generally,the goal of the control theory is to make a given dynamical system behave in a user-specified manner as accurately as possible and compromises are necessary to achieve good solutions.＂Adaptive inverse control＂ presents such a new concept to treat the two control tasks separately without compromise.In the paper adaptive inverse control is used to correct the output current waveform of the voltage source inverter in the active power filter（APF）,and all of the required operations are based on adaptive filtering techniques to identify the parameters and design the controllers.It demonstrates that the adaptive inverse control system can adapt to the variance of the electric network and would be more predominant than the conventional control strategies.Theoretical analysis is verified by simulation and experiment results.