NDLI: New ways of disruptive discharge recognition in insulation testing devices

Content Provider	IEEE Xplore Digital Library
Author	Muhr, M. Woschitz, R.
Copyright Year	2000
Description	Author affiliation: Inst. fur Hochspannungstech. mit Versuchsanstalt, Tech. Univ. Graz, Austria (Muhr, M.)
Abstract	Transformers are cost-intensive components of the electrical power supply. In order to avoid disturbances and to guarantee the operational safety, complex monitoring systems are installed to high voltage power transformers increasingly, which deliver the most important operating parameters on-line. One of these important parameters is the electrical breakdown voltage of the used oil. A fast breakdown recognition and switching off after a breakdown does not only play a role in the assessment of the breakdown voltage on the basis of several measuring sequences in which the result of one sequence depends on the breakdown energy of the sequences before but is also of special importance for the monitoring system. Every breakdown produces decomposition gases like hydrogen (H/sub 2/) and simple molecular hydrocarbon connections. Dielectric test devices which maintain the short-circuit current during a breakdown for a unnecessarily long time lead to an increase concentration of the gases mentioned before. Therefore the test device needs a fast disruptive discharge recognition. The article describes a new way of disruptive discharge recognition for test devices with an optical sensor to minimise the energy which is transposed into a test sample during the breakdown.
Starting Page	661
Ending Page	664
File Size	325480
Page Count	4
File Format	PDF
ISBN	0780354591
DOI	10.1109/ICPADM.2000.876105
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-06-21
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Insulation testing Breakdown voltage Electric breakdown Gases Power supplies Safety Condition monitoring Power transformers Petroleum Dielectric measurements
Content Type	Text
Resource Type	Article

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