NDLI: Investigating the impacts of temperature on the dielectric response of oil-paper insulation system

Content Provider	IEEE Xplore Digital Library
Author	Hua-dong Peng Ming Dong Ming Ren Jian-lin Wei Jin Miao Xue-zhou Wu
Copyright Year	2011
Description	Author affiliation: State Key Lab. of Electr. Insulation for Power Equip., Xi'an Jiaotong Univ., Xi'an, China (Hua-dong Peng; Ming Dong; Ming Ren; Jian-lin Wei; Jin Miao; Xue-zhou Wu)
Abstract	In recent decades, Dielectric Response Technique is widely used by power utilities for assessment of the condition of electrical equipments as a non-destructive dielectric testing tool, especially for oil-paper insulation systems. For on-site measurements, comparing the results at different temperature is usually difficult as the temperature uncertainty of devices, so understanding its effects on dielectric response is of great significance for the condition assessments of oil-paper insulation. In this paper, accelerated thermal aging experiments of oil-impregnated pressboard are performed to obtain aged samples. Return Voltage (RV) and Frequency domain spectroscopy (FDS) measurements are carried out on some new and aged oil-impregnated pressboards with temperature varying from 12°C to 60°C. The relationship between dielectric response and temperature is investigated both in time and frequency domain, and it is verified that temperature dependency to the response of oil-paper insulation follows an Arrhenius law. Results show that the dominant time constant of RV spectrum decreases exponentially with temperature increasing. It can be concluded that the curve of dissipation factor shifts towards higher frequencies with the same shape while temperature changes, and the whole insulation exhibits higher dissipation factor and permittivity with the aging of cellulose.
Starting Page	233
Ending Page	236
File Size	879261
Page Count	4
File Format	PDF
ISBN	9784886860743
e-ISBN	9784886860743
DOI	10.1109/ISEIM.2011.6826275
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-06
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	The Institute of Electrical Engineers, Japan
Subject Keyword	Temperature measurement Insulation Temperature Aging Dielectrics Voltage measurement Temperature dependence dissipation factor dielectric response oil-paper insulation temperature Frequency domain spectroscopy RV spectrum
Content Type	Text
Resource Type	Article

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