The application of matched filters to PD detection and localization

In practice, partial discharge (PD) signals are corrupted mainly by narrowband noise caused by radio communications. Matched filters are very well suited for PD detection in the presence of such noise, since they exploit spectral regions with high SNR to maximize the SNR of a measured PD signal. In addition to its noise suppressing capabilities, a matched filter provides a means to estimate accurately PD pulse magnitude and arrival time. Consequently, PD detection can benefit greatly from the application of matched filters. However, good knowledge of the signal waveform is required. In many cases, such information can be obtained by measurement or modeling of the PD pulse propagation.

[1]  Robert B. Northrop,et al.  Location of partial discharges in shielded cables in the presence of high noise , 1992 .

[2]  Steven A. Boggs,et al.  Partial discharge. XXII. High frequency attenuation in shielded solid dielectric power cable and implications thereof for PD location , 1996 .

[3]  N. Ahmed,et al.  The noise effect in conducting on-line partial discharge testing in distribution-class cables , 1998, 1998 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.98CH36257).

[4]  Robert B. Northrop,et al.  Signal processing techniques for partial discharge site location in shielded cables , 1990 .

[5]  Kah-Howe Tan,et al.  FPGA hardware implementation of an RNS FIR digital filter , 2001, Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256).

[6]  G. Stone,et al.  Fundamental Limitations in the Measurement of Corona and Partial Discharge , 1982, IEEE Transactions on Electrical Insulation.

[7]  S. A. Boggs,et al.  Propagation of partial discharge pulses in shielded power cable , 1982, Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1982.

[8]  S. Boggs,et al.  Partial discharge: overview and signal generation , 1990, IEEE Electrical Insulation Magazine.

[9]  W. L. Weeks,et al.  Estimating the location of partial discharges in cables , 1992 .

[10]  Mitsuru Yamada,et al.  A high-speed FIR digital filter with CSD coefficients implemented on FPGA , 2001, ASP-DAC '01.

[11]  John J. Soraghan,et al.  Detection of PD utilizing digital signal processing methods. Part 3: Open-loop noise reduction , 2001 .

[12]  J.T. Holboll,et al.  Estimation of medium voltage cable parameters for PD-detection , 1998, Conference Record of the 1998 IEEE International Symposium on Electrical Insulation (Cat. No.98CH36239).

[13]  John J. Soraghan,et al.  Digital signal processing applied to the detection of partial discharge: an overview , 2000 .