Digital Processing of Synchronously Sampled AC Signals in the Presence of Interharmonics and Subharmonics

This paper deals with the problem of estimating the value of the active power of the ac signal in the presence of subharmonics and interharmonics. The method can also be analogously applied to determine the root-mean-square (rms) value of the basic electric values. The analysis makes use of the most general model of the voltage and current signal, i.e., the most complex spectral content that can be expected to appear in practice. A simulation of the suggested procedure has been done as well, as a final confirmation of the possibility of having accurate processing by using the synchronized sampling technique, even in the presence of subharmonics and interharmonics.

[1]  P. Syam,et al.  Simulation and experimental study of interharmonic performance of a Cycloconverter-FedSynchronous motor drive , 2004, IEEE Transactions on Energy Conversion.

[2]  Tadeusz Lobos,et al.  Advanced signal processing methods of harmonics and interharmonics estimation , 2001 .

[3]  Predrag B. Petrovic,et al.  New algorithm for measuring 50/60 Hz AC values based on the usage of slow A/D converters , 2000, IEEE Trans. Instrum. Meas..

[4]  Gerard Stenbakken.  A Wideband Sampling Wattmeter1 , 1984, IEEE Transactions on Power Apparatus and Systems.

[5]  Boualem Boashash,et al.  Note on the use of the Wigner distribution for time-frequency signal analysis , 1988, IEEE Trans. Acoust. Speech Signal Process..

[6]  Predrag B. Petrovic,et al.  New digital multimeter for accurate measurement of synchronously sampled AC signals , 2004, IEEE Transactions on Instrumentation and Measurement.

[7]  A. Testa,et al.  Power system subharmonics , 2005, IEEE Power Engineering Society General Meeting, 2005.

[8]  L.M. Tolbert,et al.  Compensation-based nonactive power definition , 2003, IEEE Power Electronics Letters.

[9]  Predrag B. Petrovic,et al.  Measuring of slowly changing AC signals without sample-and-hold circuit , 2000, IEEE Trans. Instrum. Meas..

[10]  Charles W. Therrien,et al.  Discrete Random Signals and Statistical Signal Processing , 1992 .

[11]  Khaled H. Hamed,et al.  Time-frequency analysis , 2003 .

[12]  David J. Atkinson,et al.  Elimination of subharmonics in direct look-up table (DLT) sine wave reference generators for low-cost microprocessor-controlled inverters , 2003 .

[13]  T. T. Nguyen.  Parametric harmonic analysis , 1997 .

[14]  Leon M. Tolbert,et al.  Compensation-Based Non-Active Power Definition , 2003 .

[15]  G. N. Stenbakken,et al.  High-accuracy sampling wattmeter , 1992 .

[16]  L. Peretto,et al.  A model for fluorescent lamp flicker in the presence of voltage distortion , 1998, 8th International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.98EX227).

[17]  J. Jacobs,et al.  Shunt hybrid power filter control in power systems with interharmonics , 2002, VIII IEEE International Power Electronics Congress, 2002. Technical Proceedings. CIEP 2002..

[18]  A. Ben-Tal,et al.  Banded chaos in power systems , 2001 .

[19]  T. Lobos,et al.  Power system harmonics estimation using linear least squares method and SVD , 1999, IMTC/99. Proceedings of the 16th IEEE Instrumentation and Measurement Technology Conference (Cat. No.99CH36309).

[20]  G. D. Marques,et al.  A simple slip-power recovery system with a DC voltage intermediate circuit and reduced harmonics on the mains , 2000, IEEE Trans. Ind. Electron..