Title :
A digital technique for the on-line measurement of dissipation factor and capacitance
Author :
Wang, Pei ; Raghuveer, M.R. ; McDermid, W. ; Bromley, J.C.
Author_Institution :
Manitoba Univ., Winnipeg, Man., Canada
fDate :
4/1/2001 12:00:00 AM
Abstract :
This paper reports a computer-aided system for on-line monitoring of dielectric dissipation factor tan δ, and capacitance of HV apparatus. The method employs the discrete Fourier transform (DFT) which is performed on the scaled down analog voltage and current signals obtained using a digital storage oscilloscope (DSO) board. The results are displayed using the graphic user interface implemented with graphic (G) language, This technique uses optimal values of measurement parameters as indicated by software simulation and laboratory tests. Field tests were conducted at Manitoba Hydro´s Dorsey station to evaluate the insulation of a 230 kV current transformer unit using the developed system
Keywords :
capacitance; computerised monitoring; current transformers; dielectric losses; discrete Fourier transforms; insulation testing; power system measurement; power transformer insulation; power transformer testing; 230 kV; capacitance; computer-aided system; current transformer unit; dielectric dissipation factor; digital storage oscilloscope; discrete Fourier transform; graphic user interface; measurement parameters; on-line monitoring; transformer insulation; Capacitance; Computer graphics; Computerized monitoring; Dielectric measurements; Discrete Fourier transforms; Laboratories; Oscilloscopes; Software measurement; User interfaces; Voltage;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
