Title :
Application of UHF partial discharge monitoring and expert system diagnosis
Author :
Gorablenkow, J. ; Huecker, T. ; Schichler, U.
Author_Institution :
Siemens AG, Berlin, Germany
Abstract :
This paper handles the practical application of the ultra high frequency (UHF) partial discharge (PD) measuring technique in on-site tests using a resonant test set-up. Application during the service life of gas-insulated switchgear (GIS) is also addressed (on-line monitoring). Tests made during commissioning proved that even small PD defects can be detected. Even at a test voltage frequency of 122 Hz (produced by a resonant test system), the type of PD defect can be recognised on the basis of PRPD patterns from 50 Hz laboratory measurements. Furthermore, the application of PD expert system diagnosis is discussed in terms of reliability. Results based on more than a thousand measurements made at a 420/550 kV GIS laboratory set-up are presented
Keywords :
SF6 insulation; commissioning; condition monitoring; diagnostic expert systems; gas insulated switchgear; high-frequency discharges; insulation testing; partial discharge measurement; power engineering computing; reliability; switchgear testing; 122 Hz; 420 kV; 50 Hz; 550 kV; GIS; SF6; UHF partial discharge monitoring; commissioning; expert system diagnosis; gas-insulated switchgear; on-line monitoring; on-site tests; reliability; resonant test set-up; resonant test system; service life; small PD defects; test voltage frequency; ultra high frequency partial discharge; Expert systems; Frequency measurement; Geographic Information Systems; Laboratories; Monitoring; Partial discharge measurement; Partial discharges; Resonance; System testing; UHF measurements;
Conference_Titel :
Electrical Insulation, 1998. Conference Record of the 1998 IEEE International Symposium on
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-4927-X
DOI :
10.1109/ELINSL.1998.704648
