Interpretation of partial discharges at dc voltages

Author

Fromm, U.

Author_Institution

High Voltage Lab., Delft Univ. of Technol., Netherlands

Volume

2

Issue

5

fYear

1995

fDate

10/1/1995 12:00:00 AM

Firstpage

761

Lastpage

770

Abstract

The aim of this paper is to give an overview on partial discharges at dc voltage. A model is presented which describes the stochastic discharge process. The model is experimentally verified for internal discharges and for corona in air. In addition, the classification of discharge patterns is discussed. The 3-dimensional histogram describing the number of discharges depending on the discharge magnitude and on the time to the successive discharge is suggested to be used as a base for discharge recognition at dc voltage. Experimental proof is presented to show the strength of this approach

Keywords

charge measurement; corona; partial discharges; pattern classification; plasma diagnostics; stochastic processes; 3D histogram; corona; dc voltages; discharge diagnostics; discharge magnitude; discharge pattern classification; discharge recognition; internal discharges; model; overview; partial discharges; stochastic discharge process; time lag/recovery model; Breakdown voltage; Current measurement; Displacement measurement; Fault location; Flowcharts; Ignition; Partial discharges; Testing; Time measurement; Yttrium;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.469972

Filename

469972