Implementation of an On-Line PD Measurement System Using HFCT

In order to perform on-line measuring and detection of PD signals, a total solution composing of an HFCT, A/D converter and a complete software package is proposed. The software package includes compensation of HFCT contribution, filtering and noise reduction using wavelet transform and soft calibration routines. The results have shown good performance and high accuracy.

Authors:

• F. Haghjoo
• M. Sarlak
• S.M. Shahrtash

Keywords:

• Partial Discharge
• Measurement
• On-line
• HFCT

References:

[1] I. Shim, J.J. Soraghan, and W. H.Siew, "A noise reduction techniques for
on-line detection and location of partial discharges in high voltage cable
networks", IEE Meas. Sci. Technol., Vol. 11, pp. 1708-1713, 2000.
[2] X.Ma, C.Zhou, I.J.Kemp, "Automated Wavelet Selection and
Thresholding for PD Detection", IEEE Electrical Insulation Magazine,
Vol. 18, No. 2, pp. 37-45, 2002.
[3] IEC 60270-2000, "High voltage test techniques-partial discharge
measurements".
[4] S. Mallat, A Wavelet Tour of Signal Processing, Second Edition,
Academic Press: California, pp. 255-256, 1999.