DC flashover voltage characteristics and their calculation method for oil-immersed insulation systems in HVDC transformers

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · IEEE Trans. Power Del.; (United States)

DOI:https://doi.org/10.1109/TPWRD.1986.4307991· OSTI ID:5708737

Kurita, A; Takahashi, E; Ozawa, J; Watanabe, M; Okuyana, K

The effects of the laminated paper layer direction on the conductivity and the dc breakdown strength in oil-impregnated paper were experimentally clarified. It was confirmed that not only oil and paper discharges through the laminated paper layers, but also paper discharges along them triggered total flashover in oil and oil-impregnated paper composite insulation. Analyses verified the usefulness of the dc flashover voltage calculation method, based on non-linear directional field calculations and the lowest flashover voltage estimations between paper discharges along the laminated paper layers and oil and paper discharges through them.

• Research Organization: Engineering Research and Development Center, Tokyo Electric Power Co. Inc., Tokyo
• OSTI ID: 5708737
• Journal Information: IEEE Trans. Power Del.; (United States), Journal Name: IEEE Trans. Power Del.; (United States) Vol. PWRD-1:3; ISSN ITPDE
• Country of Publication: United States
• Language: English

Related Subjects

200302* -- Power Transmission & Distribution-- DC Systems-- (1989-)
24 POWER TRANSMISSION AND DISTRIBUTION
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
42 ENGINEERING
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
CALCULATION METHODS
CURRENTS
DC SYSTEMS
DIRECT CURRENT
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELECTRICAL INSULATORS
ELECTRICAL PROPERTIES
ENERGY SYSTEMS
EQUIPMENT
FLASHOVER
HVDC SYSTEMS
INSULATING OILS
LAYERS
NONLINEAR PROBLEMS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PAPER
PHYSICAL PROPERTIES
POWER SYSTEMS
TRANSFORMERS