Interharmonics analysis based on windowed interpolation and prony algorithm

Detecting interharmonics in power system for flicker troubshooting is highly desirable. Whereas these interharmonics are close to harmonic or fundamental component, it is always swamped by the main-lobe of harmonic nearby if the harmonic amplitude is much bigger than interharmonic amplitude, and vic...

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Bibliographic Details
Published in2010 2nd International Asia Conference on Informatics in Control, Automation and Robotics (CAR 2010) Vol. 1; pp. 430 - 433
Main Authors Jiefeng Xiong, Boling Wang, Shaoyong Zhang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2010
Subjects
Algorithm design and analysis
Discrete Fourier transforms
Educational institutions
Frequency
Harmonic analysis
interharmonics
Interpolation
Power engineering and energy
Power system analysis computing
Power system harmonics
Prony algorithm
Robotics and automation
windowed interpolation
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Summary:Detecting interharmonics in power system for flicker troubshooting is highly desirable. Whereas these interharmonics are close to harmonic or fundamental component, it is always swamped by the main-lobe of harmonic nearby if the harmonic amplitude is much bigger than interharmonic amplitude, and vice versa. In this paper, a double-stage algorithm is proposed based on the windowed interpolation and the Prony method to overcome this problem. The interpolation method calculates most parts of harmonics and identifies the frequency interval in which two adjacent components are located, and then the Prony algorithm is used to compute these two adjacent components. Matlab simulation shows that two adjacent components can be detected with acceptable precision and the accuracy of other harmonic components enjoy the same as the interpolation algorithm.
ISBN:1424451922
9781424451920
ISSN:1948-3414
1948-3422
DOI:10.1109/CAR.2010.5456806