Calculating the switching surge critical flashover voltage of phase-to-ground and phase-to-phase bundle conductor gaps

Author

Podporkin, G.V.

Author_Institution

St. Petersburg State Tech. Univ., Russia

Volume

10

Issue

1

fYear

1995

fDate

1/1/1995 12:00:00 AM

Firstpage

365

Lastpage

373

Abstract

The paper presents a method for calculating the 50% breakdown voltages of conductor-to-plane and conductor-to-conductor air gaps for any bundle design, all the three phases of lines being taken into account. The method is developed for switching impulses with long time front (τf=1000-4000 μsec) which are the most typical for UHV lines. The results of calculations are extensively compared with previous experimental results for different bundles and over a wide range of gap spacings. The influence of bundle configuration, type of phases displacement (flat, delta or inverted delta) and voltage distribution among phases for UHV lines are analyzed

Keywords

air gaps; electric breakdown; flashover; overhead line conductors; power transmission lines; surges; switching; 50% breakdown voltages; UHV lines; air gaps; bundle configuration; delta displacement; flat displacement; inverted delta displacement; phase-to-ground conductor gap; phase-to-phase bundle conductor gap; phases displacement; switching impulses; switching surge critical flashover voltage; voltage distribution; Air gaps; Conductors; Corona; Electric breakdown; Electrodes; Flashover; Insulation; Power transmission lines; Surges; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.368377

Filename

368377