Impact of Moisture on Space Charge Characteristics in Natural Ester Oil-Impregnated Paper

The space charge measurement was conducted on the mineral oil-paper and natural ester oil-paper with different moisture contents. With increasing the moisture content, more positive charges deeply penetrated into two kinds of oil-papers. The rate of negative charge injection in the natural ester oil...

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Bibliographic Details
Published in2020 IEEE 3rd International Conference on Dielectrics (ICD) pp. 427 - 430
Main Authors Yoon, Hyungjin, Chen, George
Format Conference Proceeding
LanguageEnglish
Published IEEE 05.07.2020
Subjects
Distortion
Electric fields
Minerals
Moisture
Moisture measurement
Space charge
Timing
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Summary:The space charge measurement was conducted on the mineral oil-paper and natural ester oil-paper with different moisture contents. With increasing the moisture content, more positive charges deeply penetrated into two kinds of oil-papers. The rate of negative charge injection in the natural ester oilpaper was always faster than that in the mineral oil-paper. The electric field distortion factor illustrated that the electrical performance of the mineral oil-paper is always better than that of the natural ester oil-paper regarding different moisture contents. After applied voltage was removed, the stronger electric field and higher moisture content were closely related to the rapid charge dissipation in the mineral oil-paper, but space charges in the natural ester oil-paper dissipated quickly regardless of the electric field strength and moisture content.
DOI:10.1109/ICD46958.2020.9341869