Title :
Experimental study on the partial discharge characteristics of four typical defects in GIS
Author :
Li, Jisheng ; Zhao, Xuefeng ; Yao, Xiu ; Li, Yanming
Author_Institution :
Sch. of Electr. Eng., Xi´´an Jiaotong Univ., Xi´´an, China
Abstract :
Partial discharge (PD) can be one of the most influential phenomena in the aging of electrical insulation systems. In order to ensure reliability in the operation of such equipment, the detection and interpretation of PD measurements is required to monitor the condition of insulation. In this paper, physical model of typical defects in gas-insulated substation (GIS) are established, and studied for PD using pulse current method, which are based on the characteristics of defects and PD checker instrument. The results show that the phase-resolved PD (PRPD) patterns, the time domain waveforms, average amplitude and central phase changing of PD signals have very similar distribution characteristics and those of different defect have different ones. So it would be very convenient for the recognition of PD types and a deeper study of the mechanism of PD.
Keywords :
ageing; fault diagnosis; gas insulated substations; partial discharge measurement; reliability; GIS; PD checker instrument; PD measurements; electrical insulation systems; equipment operation reliability; gas insulated substation; insulation condition monitoring; partial discharge characteristics; phase-resolved PD patterns; pulse current method; time domain waveforms; Aluminum; Conductors; Geographic Information Systems; Instruments; Insulation; Partial discharge measurement; Partial discharges; Pollution measurement; Signal analysis; Surface contamination; GIS; defect model; partial discharge characteristics; pulse current;
Conference_Titel :
Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3863-1
Electronic_ISBN :
978-1-4244-3864-8
DOI :
10.1109/ICEMI.2009.5274733
