Title :
Comparative evaluation of dielectric strength of paper-oil insulation under ac, dc, combined, composite ac/dc and impulse voltages
Author :
Sajan, J.S. ; Dwarakanath, K. ; Moorching, S.N.
Author_Institution :
Insulation Div., Central Power Res. Inst., Bangalore, India
Abstract :
Though paper-oil insulation is extensively used for EHV applications, there are many associated problems relating to the presence of dc component. The insulation is subjected to a dc component in addition to the average ac stresses that exist in the system. Under the combined ac/dc stresses, the behaviour of paper-oil insulation is not well understood. This paper attempts to study the breakdown characteristics of paper-oil insulation under combined and composite ac/dc voltages
Keywords :
electric breakdown; electric strength; impregnated insulation; insulating oils; paper; AC voltage; DC voltage; EHV breakdown; combined AC/DC voltage; composite AC/DC voltage; dielectric strength; impulse voltage; paper-oil insulation; Breakdown voltage; Dielectric breakdown; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Oil insulation; Petroleum; Power transformer insulation; Stress; Testing;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1998. Annual Report. Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5035-9
DOI :
10.1109/CEIDP.1998.733939
