Title :
Detection method of partial discharge in XLPE Cable accessories based on the method of VHF combined with acoustic emission
Author :
Wang, Wei ; Cheng, Xu ; Liu, Chong ; Zong, Fei ; Shen, Xueliang
Author_Institution :
Beijing Key Lab. of High Voltage & EMC, North China Electr. Power Univ., Beijing
Abstract :
Based on the experiment carried out in the lab on several cable accessories in which there are some typical PD models(In this paper, they are the models of protrusion discharge and floating discharge), the method of VHF Combined with acoustic emission (AE) for detecting PD in the XLPE cable accessories was introduced. The time domain characters of the AE and VHF signals are researched and compared in order to distinguish the PD signal from the disturbance. Two kinds PD spectrum of Qmax-phi and N-phi were analyzed and contrasted between the VHF and acoustic emission PD signals, which are protrusion discharge and floating discharge. The way to locate the PD point was also introduced. The results of the research had proved that the reliability of the PD detection is improved using the combined method.
Keywords :
XLPE insulation; acoustic emission testing; insulation testing; partial discharge measurement; power cable insulation; power cable testing; time-domain analysis; N-phi analysis; PD detection reliability; Qmax-phi analysis; VHF signals; XLPE cable accessories; acoustic emission; floating discharge; partial discharge detection method; protrusion discharge; time domain characters; Acoustic emission; Acoustic sensors; Acoustic signal detection; Cable insulation; Fault location; Laboratories; Partial discharges; Power cable insulation; Power cables; Power system modeling;
Conference_Titel :
Electrical Insulating Materials, 2008. (ISEIM 2008). International Symposium on
Conference_Location :
Mie
Print_ISBN :
978-4-88686-005-7
Electronic_ISBN :
978-4-88686-006-4
DOI :
10.1109/ISEIM.2008.4664589