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Author Kawashima, T. ♦ Murakami, Y. ♦ Nagao, M. ♦ Inagaki, Y. ♦ Ashibe, Y. ♦ Masuda, T.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2014
Language English
Subject Keyword Electrodes ♦ Superconducting cables ♦ Electric breakdown ♦ Power cables ♦ High-temperature superconductors ♦ Cable insulation ♦ Oil filled cables
Abstract Currently, high temperature superconducting (HTS) cables are developed mainly as AC cables with $PPLP^{®}-liquid$ nitrogen composite insulating system. On the other hand, solar and wind power are expected as alternative energy of fossil fuels in the future. DC transmission using superconducting technology having low transmission loss and environmental burden is most suitable for such new energies. However, DC HTS cable may raise the problem that charge injection may degrade the insulating performance, which is the same as the problem in existing DC oil immersion cables. Moreover, the influence of charge injection on breakdown characteristics of $PPLP^{®}$ in liquid nitrogen $(LN_{2})$ is not clarified yet. In this paper, DC prestressing effects on impulse breakdown strength (Fb) of $PPLP^{®}$ was investigated, and the charge injection model in $LN_{2}$ was discussed from the conventional knowledge to charge injection in DDB oil. As a result, the opposite polarity relations in impulse Fb and the prestressing effects in $LN_{2}$ appeared compared with the results in DDB oil. The DC prestress effect on impulse Fb in DDB oil can be explained based on the charge injection model in $LN_{2}$ with the opposite polarity charge injection. Therefore, the difference of breakdown characteristics of $PPLP^{®}$ in DDB oil and in $LN_{2}$ are influenced by the polarity of the charge that is easy to inject into KP layer and can explain using the charge injection model developed for the breakdown characteristics in $LN_{2}.$
Description Author affiliation: Sumitomo Electr. Ind., Ltd., Osaka, Japan (Inagaki, Y.; Ashibe, Y.; Masuda, T.) || Toyohashi Univ. of Technol., Toyohashi, Japan (Kawashima, T.; Murakami, Y.; Nagao, M.)
ISBN 9781479975259
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-10-19
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 511.51 kB
Page Count 4
Starting Page 138
Ending Page 141

Source: IEEE Xplore Digital Library