Study on charge accumulation and transient characteristics of oil paper and influence of resident charge on electric field

Qian Yu; Jiwei Wang; Xinyan Feng; Dechao Yang; Dongxin He

doi:10.1117/12.3010759

2 November 2023 Study on charge accumulation and transient characteristics of oil paper and influence of resident charge on electric field

Qian Yu, Jiwei Wang, Xinyan Feng, Dechao Yang, Dongxin He

Author Affiliations +

Proceedings Volume 12919, International Conference on Electronic Materials and Information Engineering (EMIE 2023); 129190B (2023) https://doi.org/10.1117/12.3010759
Event: 3rd International Conference on Electronic Materials and Information Engineering (EMIE 2023), 2023, Guangzhou,, China

Abstract

For studying the effect of polarity reversal electric field on the internal insulation of converter transformers, the article uses the electroacoustic pulse method as the basic principle. By measuring the space charge density at each position of oilpaper insulation under different polarity inversion times, the polarity inversion time’s influence on the oil-paper’s charge accumulation and transient characteristics is analyzed. At the same time, the electric field intensity close to the grounding electrode is obtained by integrating the charge density, and the influence of charge which is left during the inversion on the local electric field is also discussed. The research results show that as the polarity inversion time shortens, the intensity of the internal resident charge raises, which leads to the increase of the electric field intensity at the same polar voltage. In addition to that, the amplification effect of the electric field becomes more pronounced. Besides, the presence of resident charge distorts the local electric field and increases its intensity. The findings of this research have significant value in guiding for elucidating the spatial charge distribution characteristics of oil-paper insulation with the effect of the reversal of the polarity of the electric field and the impacting mechanism of resident charge on insulation degradation.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Qian Yu, Jiwei Wang, Xinyan Feng, Dechao Yang, and Dongxin He "Study on charge accumulation and transient characteristics of oil paper and influence of resident charge on electric field", Proc. SPIE 12919, International Conference on Electronic Materials and Information Engineering (EMIE 2023), 129190B (2 November 2023); https://doi.org/10.1117/12.3010759

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KEYWORDS

Electric fields

Electrodes

Dielectrics

Polarization

Transformers

Pulse signals

Vibration

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