NDLI: Charge accumulation caused by streaming electrification in transformer oil

Content Provider	IEEE Xplore Digital Library
Author	Okabe, S. Taniguchi, Y. Mori, S. Kosakada, A.
Copyright Year	2002
Description	Author affiliation: Power Eng. R&D Center, Tokyo Electr. Power Co. Inc., Japan (Okabe, S.)
Abstract	In this paper we investigated a charge accumulation of a pressboard (PB) caused by streaming electrification in transformer oil. In positive charged oil generated by filter circulation, PB in the oil had a positive charge. We evaluated the PB charge quantity by measuring a voltage or floating electrode in the PB which was inserted between two parallel plane electrodes. The results are as follows. When the moisture content in PB increased, the PB charge quantity decreased. Charge density ratio between the PB and oil was varied by the charge density in oil. So under the same moisture content in PB the higher the charge density in oil was, the smaller the ratio was. Also we investigated AC field effect on the PB charge accumulation. It was found that the AC electrical field did not have an effect on the accumulation for existing AC field below 1.0 kV/mm in the oil.
Starting Page	313
Ending Page	316
File Size	380527
Page Count	4
File Format	PDF
ISBN	0780375254
DOI	10.1109/TDC.2002.1178339
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-06
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Current measurement Moisture Oil insulation Lead Lubricating oils Circuit testing Petroleum Power transformer insulation Charge measurement
Content Type	Text
Resource Type	Article

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