,Yamagiwa T ,Okubo H .Detection of harm ful metallic particles inside gas insulated switchgear using UHF sensor[J] .IEEE Transactions on Dielectrics and Electrical Insulation , 2008 ,15(3) : 701 -709 . [15] Chang C ,Chang C S ,Jin J ,et al .Source classification of partial discharge for gas insulated substation using waveshape pattern recognition [J] . IEEE Trans actions on Dielectrics and Electrical Insulation , 2005 ,12(2) : 374 -386 [16] Cavallini A ,Montanari G C , Puletti F .A novel method to locate PD in polymeric cab le systems based on amplitude -frequency (AF) map [J] . IEEE Trans actions on Dielectrics and Electrical Insulation , 200 7 , 1 4 ( 3 ) : 726 - 734 收稿日期: 作者简介: 段大鹏(197 7 ),男,博士, 高级工程师, 主要研究方向为电力设备绝缘检测及故障诊断技术,电网谐波抑制与无功功率补偿, E -mail :duandapeng@