TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Liu, Zhongdong A1 - Himmel, Jörg A1 - Bonfig, Karl Walter T1 - Improved processing of harmonics and interharmonics by time-domain averaging JF - IEEE Transactions on Power Delivery N2 - 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. Y1 - 2005 UR - https://ieeexplore.ieee.org/document/1514481 SN - 0885-8977 SS - 0885-8977 U6 - https://doi.org/10.1109/TPWRD.2005.855477 DO - https://doi.org/10.1109/TPWRD.2005.855477 VL - 20 IS - 4 SP - 2370 EP - 2380 ER -