Integration of TDSF Analysis into TECAM Transformer On Line Monitoring System

This paper presents a unique approach to monitoring the dielectric stress severity of field measured transients on the internal insulation of a power transformer. The proposed methodology integrates the recent advances in high frequency transformer modeling and wide bandwidth field measurements to produce a visualization of the dielectric stress severity within a power transformer. It consists in implementing the time domain severity factor (TDSF) concept into the transmission equipment condition monitoring (TECAM) system. An initial field trial of the proposed strategy and some of the firs resulting analysis from the field measured data are presented.