Partial Discharge Measurement for 154kV XLPE Cable Line

154kV XLPE 케이블 실선로 부분방전 검출

HFPD(High Frequency Partial Discharge) measurement has been widely performed to diagnose cable system in the world. Shin-Yeongdeungpo 345kV XLPE line was successfully diagnosed by PD measurement methode last year. Moreover, aged power cable lines which were installed 15 years ago have been tested from this year. In this paper, the result of PD diagnosis for aged 154kV cable line is reported. The PD pattern from TMJ which was monitored by PD measurement system for several days showed typical void pattern. The joint was replaced and voids between semi-conductor layer and insulating layer in the joint was founded.