Title :
Experimental investigations on different insulating liquids and mixtures for power transformers
Author :
Perrier, C. ; Beroual, A. ; Bessede, J.-L.
Author_Institution :
Ecole Centrale de Lyon, Ecully, France
Abstract :
This paper presents a comparison between mineral, ester and silicone oils, and mixtures with mineral oil based on their mean properties, namely the heat transfer, the dielectric strength, the aging stability and the electrostatic charging tendency (ECT), in order to select the most appropriate one for power transformers. The heat transfer is studied by means of kinematic viscosity. The measurements of breakdown voltage are achieved according to IEC 60156 specifications and analyzed by Gaussian´s statistics method. The results of aging tests in temperature and in contact with atmosphere as well as the ECT versus the oil humidity and resistivity are also presented.
Keywords :
Gaussian distribution; IEC standards; ageing; electric strength; heat transfer; insulation testing; power transformer insulation; power transformer testing; silicone insulation; transformer oil; viscosity; voltage measurement; Gaussian statistics method; IEC 60156 specification; aging stability; aging test; breakdown voltage measurement; dielectric strength; electrostatic charging tendency; ester oil; heat transfer; insulating liquid; kinematic viscosity; mineral oil; power transformer; silicone oil; Aging; Dielectric liquids; Dielectrics and electrical insulation; Electrical capacitance tomography; Heat transfer; Minerals; Oils; Petroleum; Power transformer insulation; Power transformers;
Conference_Titel :
Electrical Insulation, 2004. Conference Record of the 2004 IEEE International Symposium on
Print_ISBN :
0-7803-8447-4
DOI :
10.1109/ELINSL.2004.1380540
