Title :
Frequency dielectric influence of imaginary admittance on oil-paper insulation system-a case study
Author :
Yang, Xu ; Nielsen, S. ; Ledwich, Gerard
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Queensland Univ. of Technol., Brisbane, QLD, Australia
fDate :
Sept. 29 2013-Oct. 3 2013
Abstract :
Frequency Domain Spectroscopy (FDS) is used to assess the insulation condition of oil-paper power transformers. Dissipation factor is one of the conventional indicators to analyze insulation ageing status. In this paper, the imaginary admittance of the transformers insulation, after removal of the geometric capacitance, is proposed as an alternative indicator to assist in the interpretation of ageing status. Ageing effects on the imaginary admittance are investigated both through simulation results and experimental results.
Keywords :
ageing; paper; power transformer insulation; transformer oil; FDS; ageing effects; dissipation factor; frequency dielectric influence; frequency domain spectroscopy; geometric capacitance; imaginary admittance; insulation ageing analysis; oil-paper insulation system; oil-paper power transformers; power transformer insulation; Aging; Current measurement; Geometry; Partial discharges; FDS; Geometric capacitance Imaginary admittance; Oil-paper insulation ageing; dielectric measurement;
Conference_Titel :
Power Engineering Conference (AUPEC), 2013 Australasian Universities
Conference_Location :
Hobart, TAS
DOI :
10.1109/AUPEC.2013.6725479
