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Computer-aided measurement of partial discharges in HV equipment

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1 Author(s)
E. Gulski ; Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands

A previously developed method of partial discharge (PD) recognition is used to evaluate PD in HV devices. Using conventional discharge detection (bandwidth ~400 kHz), the PD patterns are studied. By means of unambiguous statistical operators like skewness, kurtosis, number of peaks, etc., quantitative information about the discharge source can be obtained. In the case of an unknown defect, a combination of these operators is compared to the same set of operators for a known configuration. In this way, a statement can be made on the character of a discharge source. The use of this technique in evaluating different discharges in HV cable and in 400 kV SF6 insulation confirms the usefulness of the new approach

Published in:

IEEE Transactions on Electrical Insulation  (Volume:28 ,  Issue: 6 )