Title :
Calculating the switching surge critical flashover voltage of phase-to-ground and phase-to-phase bundle conductor gaps
Author_Institution :
St. Petersburg State Tech. Univ., Russia
fDate :
1/1/1995 12:00:00 AM
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;
Journal_Title :
Power Delivery, IEEE Transactions on
