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https://nagoya.repo.nii.ac.jp/oai
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2023-01-16T03:56:12Z
320:502:503
Comparison of Partial Discharge Characteristics for Different Defect Types in SF6 Gas Insulation System
Mansour, D.A.
Okusu, T.
Nishizawa, K.
Kojima, H.
Hayakawa, N.
Endo, F.
Okubo, H.
open access
Copyright © 2008 IEEE. Reprinted from 12th International Middle-East, Power System Conference, 2008. MEPCON 2008. p.85-89. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE<br/> endorsement of any of Nagoya University’s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.
The high reliability, less maintenance and compact size of Gas Insulated Switchgears (GISs) have made them the primary choice for many utilities. However, sometimes insulation defects inside GIS can be a serious threat to safe operation of GIS and can lead to costly disruption of supply. As insulation failure usually starts with partial discharge (PD) activity, this paper investigates the differences in PD characteristics in SF_6 gas among different types of defects. The defect types considered in this study are particles in a gas gap, particles adhered on a spacer surface and spacer/electrode detachment. Different experiments were made for sequential PD measurements using the system of PD-Current Pulse Waveform Analysis (PD-CPWA). The PD phase characteristics, PD pulse number and PD current were analyzed for the different defect types. Also the ratio of voltage increment to phase increment at the next PD pulse appearance (Δu/Δφ pattern) was obtained and compared for each defect type. Experimental results show that correct identification of defects can be achieved based on considered PD characteristics.
IEEE
2008-03
eng
journal article
VoR
http://hdl.handle.net/2237/12057
https://nagoya.repo.nii.ac.jp/records/10237
https://doi.org/10.1109/MEPCON.2008.4562335
12th International Middle-East, Power System Conference (MEPCON 2008)
85
89
https://nagoya.repo.nii.ac.jp/record/10237/files/3_Comparison_of_partial_discharge.pdf
application/pdf
614.0 kB
2018-02-20