Title :
Studies on the effect of ageing on the dielectric strength of transformer oil under oscillatory impulse voltages
Author :
Sarathi, R. ; Sirse, Mohan Narayanarao
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Madras, India
Abstract :
In this paper, the influence of thermal ageing on the breakdown characteristics of transformer oil with the needle-plane configuration under oscillatory impulse voltages (unidirectional, sin/cos-bidirectional) of different frequencies and dampings have been studied. For the purpose of comparison, the results obtained under similar configuration have been obtained under AC, lightning and switching impulse voltages
Keywords :
ageing; electric breakdown; electric strength; insulation testing; lightning; power transformer insulation; power transformer testing; transformer oil; AC impulse voltages; ageing; breakdown characteristics; dampings; dielectric strength; lightning impulse voltages; needle-plane configuration; oscillatory impulse voltages; switching impulse voltages; transformer oil; Aging; Dielectric breakdown; Dielectrics and electrical insulation; Frequency; Oil insulation; Petroleum; Power transformer insulation; Power transformers; Switches; Voltage-controlled oscillators;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
DOI :
10.1109/CEIDP.1997.641166
