有源电力滤波器控制延时的补偿方法研究

Compensation on Delay Time of Digital Active Power Filter

电网谐波污染日益严重,有源电力滤波器作为谐波抑制的理想解决方案受到广泛的关注。有源电力滤波器的数字实现引入了控制延迟,该控制延迟对谐波电流的补偿效果有较大的影响。分析控制延迟与谐波补偿残余量之间的关系,提出在Kalman分次谐波检测的基础上,通过相位补偿来消除控制延迟影响的方法。Matlab仿真结果验证补偿方法的有效性。

Harmonic has deteriorated power quality in power network. The use of active power filter （APF） techniques has become more attractive. Delay time arouse from digital implementation deteriorates the performance of APF. This paper analysis the relation between time delay and residual harmonic and proposes a compensation method based on selective kalman harmonic filter. The proposed scheme is verified with simulation result at last.