Condition assessment of rotating machine winding insulation by analysis of charging and discharging currents

Author

Soltani, G. Reza ; David, Eric

Author_Institution

Ecole de Technologie Superieure, Montreal, Que.

fYear

2006

fDate

11-14 June 2006

Firstpage

336

Lastpage

339

Abstract

In order to assess winding insulation condition, a field instrument measuring the charge and discharge current of rotating machine stator winding insulation under DC high-voltage was developed at Niroo Research Institute (NRI). This method that is known as PDCA (polarization and depolarization current analysis) was applied on the stator winding insulation of an 87 MW gas-turbine generator and results were compared with on-line partial discharge (PD) measurements. The results obtained from the presented method were found to be very compatible with partial discharge measurements and visual inspection of end-windings and the ability of the PDCA in assessing the condition of the ground-wall insulation was validated

Keywords

electric current measurement; inspection; machine insulation; partial discharge measurement; polarisation; stators; turbogenerators; 87 MW; Niroo Research Institute; PDCA; charging-discharging; condition assessment; current measurement; field instrument; gas-turbine generator; on-line partial discharge measurement; polarization-depolarization current analysis; rotating machine; stator winding insulation; visual inspection; Charge measurement; Current measurement; Instruments; Insulation; Machine windings; Partial discharge measurement; Partial discharges; Rotating machines; Rotation measurement; Stator windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2006. Conference Record of the 2006 IEEE International Symposium on

Conference_Location

Toronto, Ont.

ISSN

1089-084X

Print_ISBN

1-4244-0333-2

Type

conf

DOI

10.1109/ELINSL.2006.1665326

Filename

1665326