Specific harmonics detection completed by PLL based on phase voltage
AN jinsong
HU Zhiguo
AI Yongle
Abstract：In order to realize the rapid and accurate detection of power harmonic,a novel phase locked loop(PLL)is proposed to use in the active power filter(APF).Firstly,the performance of the PLL proposed is analyzed and the parameters are designed.Meanwhile,the Bode diagram and unit order step response are obtained.The results of simulation experiment show that the phase detection is not affected with the disturbance of voltage mutation and sudden reveal of harmonics by using the PLL proposed.Secondly,while the PLL is used in aspect of specific harmonic detection in APF,the simulation experiment is completed according to the separation algorithm of harmonic calculation proposed.The simulation results show that there is no any amplitude deviation by specific harmonic separation algorithm.The new algorithm is super to other algorithms with the characteristic of simple and accurate.It is suitable used in APF current detection and easily realizes the function of DSP in practice.
Keywords：phase locked loopphase detectionlow pass filterspecific harmonic detection
Publication Date：2017-07-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 89-97 )