NDLI: Partial discharge pulses at artificial protrusions in SF<sub>6</sub> under negative IEC60060-3 standard impulses

Content Provider	IEEE Xplore Digital Library
Author	Ming Ren Ming Dong Zhigang Xiao Aici Qiu
Copyright Year	1994
Abstract	Protrusion defects on conductor in gas insulated switchgear (GIS) formed by manufacture, transportation, installation or operation can seriously degrade the withstand voltage strength. Partial discharge (PD) test under ac voltage is sometimes ineffective for this type of defect in practice. Thus, we carried out PD measurements for protrusion defects under four types of standard impulse voltages and explored some basic behaviors and characteristics of PDs, which could provide some guidance on impulse PD test which may be used as a more stringent measure in the future field test. In this paper, PD pulses at protrusions with tip radii of 25, 100 and 500 μm in SF₆ in gas pressure from 0.05 MPa to 0.55 MPa, were detected under four negative IEC60060-3 impulses by using a specially designed measuring system. The voltage-time lag characteristics of the first discharge under the impulses are investigated and described by the proposed theoretical "voltage-time lag (V-t) curve of the first discharge", and the simulated results were compared with the experimentally measured V-t points. Seven different discharge current and light pulse sequences were distinguished and analyzed statistically. And then, the occurrences and mechanisms underlying these different sequences were discussed in detail.
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	273
Ending Page	283
Page Count	11
File Size	2284875
File Format	PDF
ISSN	10709878
Volume Number	21
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Voltage measurement Discharges (electric) Electric fields Silicon Sulfur hexafluoride fault diagnosis impulse voltage protrusion defects gas insulatedswitchgear field test
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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