NDLI: Particles in GIS characterization from acoustic signatures

Content Provider	IEEE Xplore Digital Library
Author	Lundgaard, L.E.
Copyright Year	1994
Abstract	Acoustic techniques are accepted generally for diagnostics of gas-insulated systems (GIS). This paper addresses the problem of risk assessment of moving particles. The main part of the paper gives a general understanding of internal particle movement and excitation of external acoustic signals, leading to signature analysis and simple calculation of characteristics such as mass and length of the particle, and its elevation height in a GIS duct. This is supported by experimental studies of acoustic and electric signals from moving particles. It is shown how partial discharge (PD) at a particle reduces the jumping tendency, and how discharges with time will change when the shape of the particle changes. Experiments on sensor sensitivity and on the coefficient of restitution also have been carried out. The signature analysis and given formulas constitute a good tool for discriminating between harmless and harmful particles, as well as offering a tool for better understanding the particle movement.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
Starting Page	1064
Ending Page	1074
Page Count	11
File Size	1105734
File Format	PDF
ISSN	10709878
Volume Number	8
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Geographic Information Systems Partial discharges Particle measurements Acoustic emission Acoustic measurements Computational modeling Frequency Shape Equations Fault location
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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