Acoustic diagnoses of GIS; field experience and development of expert system

Author

Lundgaard, L.E. ; Tangen, G. ; Skyberg, B. ; Faugstad, K.

Author_Institution

Norwegian Electr. Power Res. Inst., Trondheim, Norway

Volume

7

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

287

Lastpage

294

Abstract

The authors report on the practical aspects of acoustic diagnoses of gas insulated substations (GIS). Thirty-eight tests have been carried out during factory testing, commissioning testing, and service. The number of flaws revealed in the tests varies considerably. The flaw frequency in a GIS probably reflects the care taken during assembly. The results from the field tests reported verify that the acoustic emission method is suited for identifying and locating flaws in GIS. Using low-frequency (20-80 kHz) sensors, the method is sensitive to the most important flaws in the insulation system. The test procedures as well as criteria for source recognition, localization, and evaluation are discussed. An expert system assisting operators in diagnosing flaws in GIS is described. The system creates a database containing a representation of the GIS and the observations and conclusions from the acoustic test

Keywords

acoustic emission testing; expert systems; flaw detection; gaseous insulation; power engineering computing; substations; 20 to 80 kHz; GIS; acoustic diagnoses; acoustic emission method; commissioning testing; expert system; factory testing; flaw frequency; flaw location; gas insulated substations; source recognition; Acoustic emission; Acoustic sensors; Acoustic testing; Assembly; Frequency; Gas insulation; Geographic Information Systems; Production facilities; Sensor systems; Substations;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.108920

Filename

108920