LOADING CAPABILITY OF HVDC TRANSFORMER BUSHINGS WITH RESTRICTED OIL CIRCULATION FOR USE IN HVDC VALVE HALLS

Authors
JOHANSSON L MAGNUSON B RIFFON P MELVOLD DJ
Citation
L. Johansson et al., LOADING CAPABILITY OF HVDC TRANSFORMER BUSHINGS WITH RESTRICTED OIL CIRCULATION FOR USE IN HVDC VALVE HALLS, IEEE transactions on power delivery, 8(3), 1993, pp. 1607-1614
Citations number
5
Categorie Soggetti
Instument & Instrumentation","Engineering, Eletrical & Electronic
Journal title
IEEE transactions on power delivery → ACNP
ISSN journal
08858977
Volume
8
Issue
3
Year of publication
1993
Pages
1607 - 1614
Database
ISI
SICI code
0885-8977(1993)8:3<1607:LCOHTB>2.0.ZU;2-Y
Abstract
The loading capability of a 500 kV HVDC transformer bushing is calcula ted with some unusual conditions: the internal oil circulation in the bushing is blocked at the flange level and the ambient air temparature is raised to 60-degrees-C. The theoretical model was verified with a full-scale heat run test on a 7.8 m long bushing. A 220 m3 insulated t est chamber was required to enclose the test set-up.