Title :
Analytical investigation for causes of instability of dissipation factor of insulating oil
Author :
Min, Ling ; Hua Ren
Author_Institution :
Electr. Power Res. Inst., Beijing, China
Abstract :
The magnitude of the dissipation factor (tan δ) is an important characteristic of insulating oils. One of the factors that cause instability, namely, the colloid formation of liquid-phobic gel, has been investigated. The changes in tan δ of the oil in some 500-kV transformers have been studied over a two-year period. Recommendation for the evaluation of insulating liquids are made
Keywords :
insulating oils; loss measurement; transformer insulation; 500 kV; colloid formation; dissipation factor; instability; insulating oil; liquid-phobic gel; tan δ; transformers; Dielectric loss measurement; Dielectric losses; Dielectrics and electrical insulation; Filtering; Impurities; Oil insulation; Petroleum; Power systems; Power transformer insulation; Testing;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38335
