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An Improved ip-iq Detecting Method for Harmonics in SinglePhase Circuits(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2014年02期
Page:
24-
Research Field:
Publishing date:

Info

Title:
An Improved ip-iq Detecting Method for Harmonics in SinglePhase Circuits
Author(s):
Ju Qian; Ju Yong
School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210042,China
Keywords:
singlephase circuits; detecting method for harmonics; ip-iq method; feedback; lowpass elliptic filte
PACS:
TM761
DOI:
-
Abstract:
In view of the features of harmonics in singlephase circuits,the study makes an analysis on harmonics ip-iq detection for singlephase circuits in the way of mathematics based on the instantaneous reactive power theory.Considering accuracy and realtime of the harmonics detection,a much more suitable method for harmonics in singlephase circuits is proposed.In order to improve the performance of the whole detection system,a feedback process is added to the system.With the application of the elliptic lowpass filter featuring high decay rate in transition zone and a good frequency characteristic instead of traditional Butterworth low pass filter,the method can reduce the influence of time delay of lowpass filter on the detection accuracy.The modeling and simulation of MATLAB/Simulink proves that the method improves the accuracy and speed of dynamic response.

References:

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Last Update: 2014-06-30