NDLI: Electrostatic field analysis and verification of air cooled generator end turn insulation models

Content Provider	IEEE Xplore Digital Library
Author	Emery, F.T. Roach, J.F.
Copyright Year	1999
Description	Author affiliation: Siemens Westinghouse Power Corp., Ft. Payne, AL, USA (Emery, F.T.)
Abstract	Electrostatic field analysis was performed on generic electrodes for assessment of generator end turn electrical insulation design. A number of coil end turn configurations were analyzed near highly stressed electrode corners and along support block creep surfaces for various insulation thickness, and a range of air gap spacings. A finite element electrostatics code was employed to generate two dimensional equipotential plots for insulated electrodes with and without dielectric support blocks. Empirical theories based upon local stress enhancement were used to estimate corona onset, creep discharge, and spark breakdown as a function of insulation thickness and air gap spacing. The corona onset calculations were verified using actual test setups and monitoring the corona with the Corona Scope/sup TM/. Sparkover tests were also done to verify the calculations.
Starting Page	343
Ending Page	346
File Size	384745
Page Count	4
File Format	PDF
ISBN	0780357574
ISSN	03622479
DOI	10.1109/EEIC.1999.826236
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-10-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrostatic analysis Dielectrics and electrical insulation Corona Electrodes Creep Testing Performance analysis Coils Surface discharges Finite element methods
Content Type	Text
Resource Type	Article

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