Computer-aided measurement of partial discharges in HV equipment

Author

Gulski, E.

Author_Institution

Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands

Volume

28

Issue

6

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

969

Lastpage

983

Abstract

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

Keywords

automatic test equipment; cable testing; electric variables measurement; high-voltage techniques; insulation testing; partial discharges; pattern recognition; statistical analysis; 400 kHz; 400 kV; HV cable; HV equipment; PD measurement; PD patterns; PD recognition; SF₆; SF₆ insulation; computer-aided measurement; discharge source; partial discharges; statistical operators; Automatic testing; Bandwidth; Cable insulation; Dielectrics and electrical insulation; Fault location; Laboratories; Partial discharges; Pattern recognition; Shape; System testing;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.249370

Filename

249370