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Notice of retraction
Vol. 34, No. 8(3), S&M3042

Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Sensors and Materials, Volume 29, Number 8 (2017)
Copyright(C) MYU K.K.
pp. 1109-1122
S&M1404 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2017.1422
Published: August 16, 2017

Study of Space Charge Dynamics in Oil and Pressboard Composite System under Different Polarity Reversal Voltages [PDF]

Miao Hao, George Chen, Xin Chen, Chong Zhang, Wenpeng Li, Haitian Wang, Mingyu Zhou, and Xianzhang Lei

(Received June 27, 2016; Accepted March 22, 2017)

Keywords: polarity reversal, oil-pressboard, aging, space charge, PEA, HVDC, convertor transformer, electric field distortion, interface

The impacts caused by the polarity reversal of the applied voltage on space charge dynamics and electric field enhancement across an oil gap have been studied in an oil gap and single-layer pressboard composite insulation system. The experimental results validate that the electric field enhancement across the oil gap immediately after the application of the reversed electric field is directly dependent on the number of residual charges within the insulation system at the moment of the application of the reversed stress. Therefore, the electric field enhancement in the system is strongly dependent on the magnitude of the applied electric field, the duration of polarity reversal and the degradation of the mineral oil. An estimation of the enhanced electric field immediately after polarity reversal based on the charge decay characteristics has been proposed and successfully applied to calculate the electric field enhancement in an aged oil sample under 20 kV/mm, which cannot be accurately measured due to the very fast space charge dynamics in the aged oil under a strongly enhanced electric field.

Corresponding author: Miao Hao


Cite this article
Miao Hao, George Chen, Xin Chen, Chong Zhang, Wenpeng Li, Haitian Wang, Mingyu Zhou, and Xianzhang Lei, Study of Space Charge Dynamics in Oil and Pressboard Composite System under Different Polarity Reversal Voltages, Sens. Mater., Vol. 29, No. 8, 2017, p. 1109-1122.



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