基于梳状滤波器和子群算法的谐波检测装置

Harmonic detection device based on comb filter and subgroup algorithm

针对现有谐波与间谐波检测算法存在精度和实时性较差的问题,提出了一种基于梳状滤波器和子群思想的谐波与间谐波检测算法,并基于该算法设计了一种谐波检测装置。该装置首先采用梳状滤波器对信号进行谐波与间谐波的有效分离,然后采用间谐波子群算法对分离后的信号进行间谐波分量计算,用原始信号减去间谐波分量重构采样序列,最后再采用谐波子群算法计算谐波分量,从而实现了谐波的高精度检测。测试结果验证了该装置具有较高的检测精度。

In view of problems of bad accuracy and real-time existed in harmonic and inter-harmonic detection algorithm,a harmonic and inter-harmonic detection algorithm based on comb filter and subgroup idea was proposed,and a harmonic monitoring device based on the algorithm was designed.Firstly,the device uses the comb filter to separate harmonic and inter-harmonics from original signal effectively.Then,the device uses inter-harmonic subgroup algorithm to calculate inter-harmonic component of the separated signal,and uses original signal component to minus the inter-harmonic component to reconstruct of sampled sequences.Finally,the device adopts harmonic subgroup algorithm to calculate the harmoniccomponent,so as to realize high precision detection of harmonic.Test results verify that the device has high detection accuracy.