A Kalman-Filter Spectral Envelope Preprocessor

This paper presents a Kalman-filter approach for computing spectral envelopes of current waveforms for nonintrusive load monitoring on the electric utility. Spectral envelopes represent time-varying frequency content and phase of the current relative to the voltage. Thus, the techniques presented in this paper may be applicable to a variety of lock-in measurement and signal processing techniques. The lock-in and computational performance of the proposed method favorably compares to previous efforts. The performance is demonstrated with data from the field.

[1]  S.B. Lee,et al.  A Multiprocessor for Transient Event Detection , 1997, IEEE Power Engineering Review.

[2]  P. Stoica,et al.  Parameter estimation for harmonic sinusoidal signals , 1999, Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020).

[3]  Aurobinda Routray,et al.  A novel Kalman filter for frequency estimation of distorted signals in power systems , 2002, IEEE Trans. Instrum. Meas..

[4]  A. Willsky,et al.  Signals and Systems , 2004 .

[5]  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).

[6]  Umair A. Khan.  A multiprocessing platform for transient event detection , 1995 .

[7]  Michel Meunier,et al.  New signal processing tools applied to power quality analysis , 1999 .

[8]  Alan V. Oppenheim,et al.  Discrete-time Signal Processing. Vol.2 , 2001 .

[9]  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).

[10]  A. Albicki,et al.  Data extraction for effective non-intrusive identification of residential power loads , 1998, IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222).

[11]  Steven B. Leeb,et al.  A conjoint pattern recognition approach to nonintrusive load monitoring , 1993 .

[12]  Steven B. Leeb,et al.  Instrumentation for High Performance Nonintrusive Electrical Load Monitoring , 1998 .

[13]  S. R. Shaw,et al.  Transient event detection in spectral envelope estimates for nonintrusive load monitoring , 1995 .

[14]  Kwangduk Douglas Lee,et al.  Electric load information system based on non-intrusive power monitoring , 2003 .

[15]  James L. Kirtley,et al.  A multiscale transient event detector for nonintrusive load monitoring , 1993, Proceedings of IECON '93 - 19th Annual Conference of IEEE Industrial Electronics.

[16]  Steven R. Shaw,et al.  System identification techniques and modeling for nonintrusive load diagnostics , 2000 .