HVDC wall bushing performance in wet weather
There is a history of flashovers of wall bushings in rain, even when they are relatively clean. These flashovers appear to be associated generally with a non- uniform rain distribution because of the shielding effect of the valve hall. This paper reports that a study has been made of this problem involving the development of laboratory test techniques to simulate the critical conditions, and also verification that the rapid flashover clean fog test can be used for evaluating a polluted DC bushing. Using these techniques a conventional bushing has been assessed and a method of improving its performance has been found by fitting it with supplementary silicone-rubber sheds, (booster sheds). The effects of various numbers of such sheds on the bushing have been measured, as have the effects of modifications to the booster shed.
- OSTI ID:
- 5853327
- Journal Information:
- IEEE Power Engineering Review (Institute of Electrical and Electronics Engineers); (United States), Vol. 10:10; ISSN 0272-1724
- Country of Publication:
- United States
- Language:
- English
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HVDC wall bushing studies
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Related Subjects
FLASHOVER
ENVIRONMENTAL IMPACTS
HVDC SYSTEMS
PERFORMANCE TESTING
BUSHINGS
DESIGN
MODIFICATIONS
RAIN
RUBBERS
SCALE MODELS
SHIELDING
SILICONES
WEATHER
ATMOSPHERIC PRECIPITATIONS
CURRENTS
DC SYSTEMS
ELASTOMERS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SILICON COMPOUNDS
POLYMERS
POWER SYSTEMS
SILOXANES
STRUCTURAL MODELS
TESTING
240200* - Power System Networks
Transmission & Distribution- (1990-)
240500 - Power Transmission & Distribution- Environmental Aspects- (1990-)
240100 - Power Systems- (1990-)