A study on the influence of partial discharges on the performance of solid dielectrics

Author

Nagamani, H.N. ; Moorching, S.N.

Author_Institution

Central Power Res. Inst., Bangalore, India

fYear

1998

fDate

22-25 Jun 1998

Firstpage

127

Lastpage

130

Abstract

The authors show that the Inverse Power Law model seems to fit the physical process of degradation of solid insulation under the influence of partial discharge activity. The present study also indicates that the presence of electrical trees in XLPE leads to partial discharges, the magnitude of which appears to depend on the tree length. Electrical treeing does not appear to contribute to tan δ and insulation resistance. The influence of PD activity on the life depends on the type of insulation in which partial discharges are taking place. For example, partial discharge magnitude of 200 pC results in a characteristic life of 2500 hours for MPPF capacitors, whereas a PD magnitude as high as 9000 pC results in a life of more than 5000 hours for machine insulation

Keywords

XLPE insulation; insulation testing; machine insulation; partial discharges; power cable insulation; power capacitors; trees (electrical); 2500 hour; 5000 hour; MPPF capacitors; XLPE insulation; cable insulation; capacitor insulation; characteristic life; electrical trees; insulation performance; insulation resistance; inverse power law model; machine insulation; metallized polypropylene film capacitors; partial discharges; solid dielectrics; tan δ; tree length; Aging; Cable insulation; Capacitors; Coils; Dielectrics and electrical insulation; Partial discharges; Rotating machines; Solids; Stress; Trees - insulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Solid Dielectrics, 1998. ICSD '98. Proceedings of the 1998 IEEE 6th International Conference on

Conference_Location

Vasteras

Print_ISBN

0-7803-4237-2

Type

conf

DOI

10.1109/ICSD.1998.709242

Filename

709242