Title :
A current-comparator technique for measuring harmonic distortion of the loss current in high voltage cable insulation
Author :
Bulinski, A.T. ; So, E. ; Bamji, S.S.
Author_Institution :
Nat. Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
Water trees, a type of deterioration that develops in high voltage cable insulation in a humid environment, introduce harmonic distortion in the waveform of the loss current component of the capacitive current of cable insulation. The measurements of the total harmonic distortion could be used as a diagnostic tool to assess the operating conditions of power cables, in particular polymeric-type cables, and their remaining insulation life. A current-comparator technique to accurately measure the total harmonic distortion, including test results obtained on laboratory-aged specimens and short lengths of field-aged cables containing water trees, is presented.
Keywords :
current comparators; distortion measurement; environmental degradation; harmonic distortion; loss measurement; power cable insulation; power cable testing; power system harmonics; trees (electrical); underground cables; capacitive current loss current component; current-comparator techniques; field-aged cable specimens; high voltage cable insulation water trees; humid environment insulation deterioration; laboratory-aged cable specimens; loss current harmonic distortion measurement; polymeric-type cable insulation life; power cable operating condition diagnostic tools; total harmonic distortion; underground power cable failures; Cable insulation; Cables; Current measurement; Distortion measurement; Harmonic distortion; Loss measurement; Power measurement; Total harmonic distortion; Trees - insulation; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034694
