Title :
Harmonic detection for three-phase circuits based on resampling and feedback theory
Author :
Zhang, Jun-min ; Liu, Kai-pei
Author_Institution :
South-Central Univ. For Nationalities, Wuhan
Abstract :
A method for digital harmonic detecting based on resampling and feedback theory is proposed, and a digital harmonic detecting system is designed. According of feedback theory, the filter can be designed to take the direct current Ip(Iq), and the ip(iq) before the low-pass filter can be resampled based on the resampling theory. Through this digital system the harmonic currents in power system can be detected timely and accurately. The simulation of the system shows that this filter not only takes advantages of digital filters in accuracy, but also overcomes the bad performance of digital filters in dynamics, and can fellow the measured signal in real time.
Keywords :
active filters; digital filters; feedback; low-pass filters; power harmonic filters; power system harmonics; reactive power; active power filter; digital filters; digital harmonic detection; feedback theory; harmonic currents; instantaneous reactive power theory; low-pass filter; power system; resampling theory; three-phase circuits; Digital filters; Digital systems; Feedback circuits; Filtering theory; Low pass filters; Power harmonic filters; Power system dynamics; Power system harmonics; Power system measurements; Power system simulation; Active power filter; Feedback theory; Harmonic detection; Instantaneous reactive theory; Resampling;
Conference_Titel :
Wavelet Analysis and Pattern Recognition, 2007. ICWAPR '07. International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-1065-1
Electronic_ISBN :
978-1-4244-1066-8
DOI :
10.1109/ICWAPR.2007.4420630
