Influence of Moisture on the Space Charge Migration and Electric Field Behavior in Oil-Paper Insulation

Jin Fu; Jian Hao; Hua Yin; Gao Lin Wu; Qian Wang

doi:10.4028/www.scientific.net/AMM.644-650.3548

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 644-650Influence of Moisture on the Space Charge...

Influence of Moisture on the Space Charge Migration and Electric Field Behavior in Oil-Paper Insulation

Abstract:

Moisture has a detrimental effect on oil-paper insulation life by lowering electrical breakdown strength. How does the space charge behavior of the oil-paper insulation system consisted by oil gap and oil immersed insulation pressboard with different moisture content The space charge characteristics of the mixed insulation consisted of oil gap and pressboard with three moisture content were investigated using the PEA measurement system. The space charge accumulation behaviors at the interface between oil gap and pressboard were analyzed. The distortion of the electrical field in the oil gap and pressboard was also analyzed. Results show that there are many charges injected into the oil and the pressboard. The charges accumulated at the interface between oil gap and pressboard. The charges accumulated in the mixed insulation system become less with the moisture content increased. The difference of the electric field strength in the oil gap and pressboard become smaller with the moisture content increased.

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Periodical:

Applied Mechanics and Materials (Volumes 644-650)

Pages:

3548-3551

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.644-650.3548

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Online since:

September 2014

Authors:

Jin Fu*, Jian Hao, Hua Yin, Gao Lin Wu, Qian Wang

Keywords:

Electric Field, Migration, Moisture, Oil-Paper Insulation, Space Charge

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