高圧架空ケーブル接続体における部分放電発生の特定に関する基礎的検討

抄録

Cable joints connecting a pole transformer and a high voltage distribution cable are one of the most important distribution equipment. In this paper, an artificial defect was placed in a cable joint among a large number of actual equipment, PD signals were measured by various sensors (high frequency CT and transient earth voltage sensor), and the diagnostic method was examined. The above results indicate that the possibility of occurrence of PD inside and outside the specimen could be identified by evaluating the arrival time difference of the PD signal by several sensors.