Simulation analysis of the effect of nanoparticles on streamer development in transformer oil

被引：0

作者：

Shi, Jian ^{[1
,2
]}

Sima, Wenxia ^{[1
]}

Yang, Qing ^{[1
]}

Cao, Xuefei ^{[1
]}

Yu, Fei ^{[1
]}

机构：

[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing

[2] Electric Power Research Institute, China Southern Power Grid, Guangzhou

来源：

Gaodianya Jishu/High Voltage Engineering | 2015年 / 41卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Continuum equations; Electron potential; Nanoparticle; Space charge; Streamer discharge; Transformer oil;

D O I：

10.13336/j.1003-6520.hve.2015.02.010

中图分类号：

学科分类号：

摘要：

To further understand how nanoparticle component improves transformer oil, we established an electric field dependent molecular ionization model of streamer development in transformer oil based on the working mechanism of nanoparticles. In the model, the continuum equations of electrons, positive and negative ions, and negatively charged nanoparticles are coupled with Poisson equations. Through calculations with the model, we obtained and compared the electric field distribution, space charge distribution, streamer radius, streamer velocity, etc. during streamer developments in transformer oil and oil-based nanofluid. The results show that, the appearance of nanoparticles in oil reduces electrons in streamer channels, thereby the space charge in streamer head increases, the radius of streamer is condensed, and the streamer velocity decreases significantly. The distribution of negative charge density indicates that the electron attachment to conductive nanoparticles in oil is the root cause of the oil performance improvement. ©, 2015, Science Press. All right reserved.

引用

页码：424 / 431

页数：7

共 21 条

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