Title :
Optical discharge detection in SF6-insulated systems
Author :
Binns, D.F. ; Mufti, A.H. ; Malik, N.H.
Author_Institution :
Salford Univ., UK
fDate :
4/1/1990 12:00:00 AM
Abstract :
A description is given of an optoelectronic system for detecting and locating corona discharges in SF6-filled gas-insulated systems (GIS). The system consists of optical fiber links, photomultiplier light detectors, an operational amplifier, and a computer-based data collection system. Various factors that can influence the optical discharge detection sensitivity are investigated. It is shown that an optical system can detect discharges that are located even in the hidden areas in GIS. The detector can sense corona discharges of <5 pC located at distances of ⩽50 cm. For application of this technique to large practical systems, it will be necessary to use multiple-access windows and/or suitable additives that could enhance the light emission without reducing the insulation performance of the system. The optically measured discharge onset voltages are verified using conventional electrical discharge detection techniques
Keywords :
corona; electric breakdown of gases; fault location; gaseous insulation; protection; sulphur compounds; 50 cm; GIS; SF6 insulated systems; additives; computer-based data collection system; corona discharge detection; discharge detection sensitivity; discharge location; gas-insulated systems; hidden areas; light emission enhancement; operational amplifier; optical discharge detection; optical fiber links; optically measured discharge onset voltages; optoelectronic system; photomultiplier light detectors; prototype; Corona; Fault location; Geographic Information Systems; Optical detectors; Optical fiber amplifiers; Optical fibers; Optical sensors; Photomultipliers; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Electrical Insulation, IEEE Transactions on
