基于不同油纸介电常数配比的油纸沿面放电仿真

doi:10.19595/j.cnki.1000-6753.tces.191585

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Abstract Oil-paper insulation system is an essential part of transformer insulation, and oil-paper surface discharge is one of the main causes of transformer failure. In this paper, the mathematical model and multi-physical field simulation model of oil-paper discharge were constructed by Gauss and current continuity equations. The discharge characteristics when the paperboard respectively parallel and perpendicular to the electric field direction in different oil / paper dielectric constant ratio systems under positive lightning impulse voltage were studied. The electric field and space charge distribution characteristics in pure oil and the oil with pressboard existed were analyzed. The influence of different oil/paper dielectric constant ratios on the streamer propagation path was analyzed. The results show that the oil/paper dielectric constant ratio directly affects the development morphology of the streamer. The higher the difference, the easier the streamer grows along the pressboard surface and the more uneven distribution of the electric field. This research has important guiding significance for the design and material selection of the oil-paper insulation system.

Key words： Vegetable insulating oil simulation dielectric constant distribution of electric field distribution of space charge

Received: 21 November 2019

PACS:

TM855

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	Chen Gang
	Huang Zhengyong
	Duan Yu
	Li Jian
	Yao Degui

Cite this article:

Chen Gang,Huang Zhengyong,Duan Yu等. Simulation of Surface Discharge Based on the Different Ratio of Dielectric Constants of Oil and Papers[J]. Transactions of China Electrotechnical Society, 2020, 35(zk2): 620-628.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191585 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/Izk2/620

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