Title :
A study on effects of conducting particles in SF6 gas and test methods for GIS
Author :
Hattori, T. ; Honda, M. ; Aoyagi, H. ; Kobayashi, N. ; Terasaka, K.
Author_Institution :
Tokyo Electr. Power Co. Inc., Japan
fDate :
1/1/1988 12:00:00 AM
Abstract :
The effects of conducting particles in gas-insulated switchgear (GIS) on insulation performance were investigated. The objective was to recognise the relationship between the length of conducting particles and AC impulse flashover voltages. The data showed that the minimum harmful length of conducting particles at various voltages applied to GIS in service is governed by lightning surge amplitude corresponding to the basic impulse insulation level (BIL). The size of minimum harmful conducting particles was also estimated for various GIS ratings. To further improve the reliability of GIS, factory and on-site test methods are suggested for preventing insulation failures caused by conducting particles
Keywords :
flashover; gaseous insulation; sulphur compounds; switchgear; AC impulse flashover voltages; SF6 gas; basic impulse insulation level; conducting particles; gas-insulated switchgear; insulation performance; lightning surge amplitude; minimum harmful length; on-site test methods; reliability; Aluminum; Coaxial components; Dielectrics and electrical insulation; Flashover; Gas insulation; Geographic Information Systems; Impulse testing; Insulation testing; Lightning; Production facilities; Sulfur hexafluoride; Surges; Switchgear; Voltage; Wire;
Journal_Title :
Power Delivery, IEEE Transactions on
