Study of Integral Water Cooling System for 154 kV Self Contained Oil Filled Cables

This paper deals with the problems of an integral water cooled cable system to increase the capability of 154 kV underground transmission line. The trial line equivalent to a commercial one was constructed to investigate the cooling effect of cable and joints, the suppression of thermal expansion and so on. We found that the transmission of 500 MVA/cct of 154 kV 2000 mm2 aluminum sheathed oil filled cable is possible using it. Descriptions are given of these results.