Title :
Research on the dielectric properties and breakdown voltage of transformer oil-paper insulation after accelerating thermal ageing
Author :
Tang, Chao ; Liao, Rui-jin ; Yang, Li-jun ; Huang, Fei-long
Author_Institution :
State Key Lab. of Power Transm. Equip. & Syst. Security & New Technol., Chongqing Univ., Chongqing, China
Abstract :
In this paper, a set of accelerate thermal ageing experiments on oil immersed insulation paper were performed under 110□ and lasted for more than 100 days. The degree of polymerization (DP), the frequency domain spectroscopy (FDS) and water concentration in insulating oil and paper, as well as the AC breakdown voltage of insulation paper were tested and analyzed. The results indicate that the dielectric properties can be used as indicators for the degradation evaluation of insulation paper. And the breakdown voltage of paper showed very little difference after accelerating thermal ageing, the electrical strength of oil-paper insulation system depends mainly on the performance of insulating oil.
Keywords :
ageing; electric breakdown; electric strength; insulating oils; AC breakdown voltage; degree of polymerization; dielectric properties; electrical strength; frequency domain spectroscopy; oil immersed insulation paper; thermal ageing; transformer oil-paper insulation; water concentration; Aging; Dielectrics; Oil insulation; Petroleum; Power transformer insulation;
Conference_Titel :
High Voltage Engineering and Application (ICHVE), 2010 International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-8283-2
DOI :
10.1109/ICHVE.2010.5640744
