DocumentCode :
78555
Title :
Development of leakage energy allocation approach for time-varying interharmonics tracking
Author :
Hsiung Cheng Lin
Author_Institution :
Dept. of Electron. Eng., Nat. Chin-Yi Univ. of Technol., Taichung, Taiwan
Volume :
9
Issue :
9
fYear :
2015
fDate :
6 5 2015
Firstpage :
798
Lastpage :
804
Abstract :
Recently, an increasing use of power electronic facilities in industry has produced considerable harmonics and interharmonics in power systems. The power supply quality is therefore seriously threatened. The discrete Fourier transform (DFT) is currently the most important tool in signal analysis. However, a misapplication of DFT may result in incorrect outcome because of some inherent limitations such as spectral leakage or aliasing effect etc. The existing interharmonics even raise more difficulty in signal analysis than harmonics. To overcome this dilemma, this study develops a strategy of leakage energy allocation method for both stationary and non-stationary interharmonics identification. The proposed algorithm can regain its original interharmonics amplitude by restoring all spilled leakage energy, and also finds its individual frequency component according to the distribution of spilled leakage energy. The performance effectiveness of the proposed approach is verified using the numerical examples in terms of reliability, rapid response and high-precision performance.
Keywords :
discrete Fourier transforms; power supply quality; discrete Fourier transform; leakage energy allocation approach; power electronic facilities; power supply quality; power system harmonics; spilled leakage energy; time-varying interharmonics tracking;
fLanguage :
English
Journal_Title :
Generation, Transmission & Distribution, IET
Publisher :
iet
ISSN :
1751-8687
Type :
jour
DOI :
10.1049/iet-gtd.2014.0728
Filename :
7112873
Link To Document :
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