Study of short-time ac flashover voltage of contaminated insulators and a consideration of its application to transmission line insulation design. [500 kV lines]

Conference · Thu Jan 01 00:00:00 EST 1976 · IEEE Trans. Power Appar. Syst.; (United States)

OSTI ID:7212942

Itabashi, T ^[1]; Osada, K; Seta, T; Naito, K

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1. Tokyo Electric Power Co., Inc.

Insulator contamination is the decisive factor in making insulation design of most transmission lines in Japan. The performance of contaminated insulators against a short-time ac overvoltage in the order of several cycles is described, taking into consideration comparatively higher overvoltage due to the one-phase-to-ground fault of recent long-distance bulk power transmission lines with series capacitors. It has been made clear by this study that, in the case of a fault clearance within 0.07 sec, e.g., the flashover voltage increases by about 15% more than in a continuous energization. This implies that the insulation of series-capacitor-compensated lines can be met by the conventional insulation design levels.

• OSTI ID: 7212942
• Journal Information: IEEE Trans. Power Appar. Syst.; (United States), Vol. PAS-95:5; Conference: IEEE Power Engineering Society Winter meeting and Tesla symposium, New York, NY (USA), 25 Jan 1976
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
EHV AC SYSTEMS
POWER TRANSMISSION LINES
ELECTRICAL INSULATORS
FLASHOVER
PERFORMANCE
DESIGN
LIGHTNING
MOISTURE
OVERVOLTAGE
SURFACES
SURGES
AC SYSTEMS
CURRENTS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
EQUIPMENT
POWER SYSTEMS
200301* - Power Transmission & Distribution- AC Systems
EHV & UHV- (-1989)