基于放电时差的局部放电模式识别的研究刘玲.pdfVIP

DOI牶牨牥牣牨牫牫牫牰牤j牣牨牥牥牫牠牰牭牪牥牣hve牣牪牥牥牱牣牥牳牣牥牥牳 33 8 　　　　 Vol. 33 No. 8 　　2007 　　8 High Voltage E gi eeri g Aug. 　2007 35 刘　玲, 廖瑞金, 周　湶, 叶开颜, 李　剑 (重庆大学高电压与电工新技术教育部重点实验室, 重庆400044) 　:、, , 、H n (Δt,φ), , , (RBFNN)5 。, 90%。 :;;;;;;RBF :TM835 :A :100-3 6520(2007)08-0035-05 PD Pattern Recognition Using Inter-time LIU Li g, LIAO Ru-i ji , ZHOU Qua , YE Ka-i ya , LI Jia (The Key Laboratory of High Voltage a d Electrical New Tech ology of M i istry of Educatio , Cho gqi g U iversity, Cho gqi g 400044, Chi a) Abstract:Auto-recog itio to discharge types i o-li e partial discharge (PD)mo itori g system could be used to fi d out i ter al partial defects a d the releva t discharge developme t degree i time, a d the preve ts equipme t from the comi g faults. Time i tervals betw ee co secutive discharges(Δt)may eve be more efficie t to characte-r ize a defect or to differe tiate betwee differe t defects. I this paper, five ki ds of typical artificial defect models of oi-l paper i sulatio , such as oi-l gap discharge model, surface discharge model, cavity discharge model, coro a di-s charge model a d mixture discharge model were desig ed, PD sample data caused by artificial defects were got by PD detectio system i laboratory. Utilizi g these sample data, the i te-r time distributio s of PD pulse w ere i t ro- duced i PD patter recog itio , the -3 D image H (Δt,φ)of discharge phase, i te-r time a d discharge umber φ-Δ-t n distributio was co structed, a d the box dime sio a d i formatio dime sio of gray i te sity images w hich were tra sferred by -3 D images were a alyzed a d extracted. I this scheme, PD f ractal dime sio s were used as i-