DocumentCode :
1162811
Title :
Calculation of Steady-State Surface at Winding Ends of Air-Core Power Reactors
Author :
Salama, M.M.A. ; Dudley, R.F. ; Gela, G.
Author_Institution :
Electrical Engineering Department Ain Shams University
Issue :
7
fYear :
1981
fDate :
7/1/1981 12:00:00 AM
Firstpage :
3673
Lastpage :
3678
Abstract :
Under severe wet weather conditions, air-core power reactors may exhibit local surface discharge activities. These activities have on occasion been observed to take place on the outer surface of the "end ring" i. e. on that part of the winding encapsulation which separates the winding from the termination structure ("spider"). Occurrence of these discharges is a function of the coil electrode configuration, operating voltage levels and properties of the encapsulation material. Laboratory evidence, however, indicates that these discharge activities exist only at very high local tangential voltage stresses and that they tend to be self-limiting. It is the purpose of this paper to report on a numerical investigation into prevention of such activities through proper dimensioning of the end ring. Results obtained, in terms of comparisons among various situations, are in good agreement with experimental observations and accumulated field experience.
Keywords :
Aluminum; Coils; Corona; Encapsulation; Inductors; Packaging; Steady-state; Stress; Surface discharges; Voltage;
fLanguage :
English
Journal_Title :
Power Apparatus and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9510
Type :
jour
DOI :
10.1109/TPAS.1981.316662
Filename :
4111050
Link To Document :
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