NDLI: Fundamental insulation characteristics of high-pressure CO<sub>2</sub> gas for gas-insulated power equipment - effect of coating conductor on insulation performance and effect of decomposition products on creeping insulation of spacer -

Content Provider	IEEE Xplore Digital Library
Author	Goshima, H. Okabe, S. Ueda, T. Morii, H. Yamachi, N. Takahata, K. Hikita, M.
Copyright Year	1994
Abstract	Currently, environmental problems such as global warming are important issues, and SF₆ has been identified as a greenhouse gas with a long atmospheric lifetime. Therefore, in the long term, it is preferable to reduce the amount of SF₆ used as an insulating gas. It is thus important to discuss the possibility of using more environmentally friendly gases as alternative insulation for gas-insulated apparatus. In this paper, we describe the fundamental insulation breakdown characteristics of high-pressure CO₂ gas at gas pressures of up to 1.0 MPa under simulated practical conditions, including the insulation breakdown characteristics of a high-voltage conductor with an insulating coating and the effect of decomposition products on the creeping insulation of a spacer. With the aim of enhancing insulation performance, we discuss the effect of the type of insulating coating on insulation performance. The breakdown electric field was increased by 20% by coating the conductor. It was verified that the application of an insulating coating is a practical method for enhancing the insulation performance of high-pressure CO₂ gas. It was also verified that the decomposition products have only a slight effect on the creeping insulation of the spacer except for when there is heavy pollution on the insulating spacer. However, if a large amount of decomposition products is expected to be deposited on the insulating spacer during operation, which may cause a severe interruption to the current, it will be necessary to consider this factor in the insulation design.
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
File Size	1431520
File Format	PDF
ISSN	10709878
Volume Number	15
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gas insulation Coatings Global warming Electric breakdown Conductors Dielectrics and electrical insulation Gases Breakdown voltage Environmental factors Switchgear Insulating gas, SF ₆ substitute, CO ₂ gas, gas-insulated switchgear (GIS), insulation breakdown characteristics, electrode coating, decomposition, products
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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