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Improved processing of harmonics and interharmonics by time-domain averaging

  • The harmonic and interharmonic analysis recommendations are contained in the latest International Electrotechnical Commission (IEC) standards on power quality. Measurement and analysis experiences have shown that great difficulties arise in the interharmonics detection and measurement with acceptable levels of accuracy. In this paper, the spectral leakage problems of the discrete Fourier transform due to synchronization errors of interharmonics are analyzed. The time-domain averaging is investigated for the processing of harmonics in the framework of the IEC standards. A difference filter is proposed to detect interharmonics and can be compatible with the IEC standards. Simulations and the field results show the usefulness of the proposed methods.

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Author:Zhongdong Liu, Jörg Himmel, Karl Walter Bonfig
Parent Title (German):IEEE Transactions on Power Delivery
Document Type:Article
Year of Completion:2005
Release Date:2019/04/15
First Page:2370
Last Page:2380
Institutes:Fachbereich 4 - Institut Mess- und Senstortechnik
DDC class:600 Technik, Medizin, angewandte Wissenschaften / 600 Technik
Licence (German):License LogoNo Creative Commons