交流电场下变压器油中气泡动力学特性仿真

doi:10.16182/j.issn1004731x.joss.201612029

系统仿真学报 ›› 2016, Vol. 28 ›› Issue (12): 3081-3087.doi: 10.16182/j.issn1004731x.joss.201612029

交流电场下变压器油中气泡动力学特性仿真

赵涛¹, 刘云鹏¹, 律方成¹, 刘山²

1.华北电力大学电力工程系,河北保定 071003;
2.国网保定供电公司,河北保定 071000

收稿日期:2015-12-04 修回日期:2016-05-24 出版日期:2016-12-08 发布日期:2020-08-13
作者简介:赵涛(1982-),男,河北保定,博士生,讲师,研究方向为电气设备绝缘在线监测;刘云鹏(1976-),男,安徽金寨,博士,教授,研究方向为电气设备在线监测。
基金资助:
中央高校基本科研业务费专项资金(2015MS90)

Bubble Dynamics Simulation in Transformer Oil under AC Electric Field

Zhao Tao¹, Liu Yunpeng¹, Lü Fangcheng¹, Liu Shan²

1. School of Electrical engineering, North China Electric Power University, Baoding 071003, China;
2. State Grid Baoding Electric Power Supply Company, Baoding 071000, China

Received:2015-12-04 Revised:2016-05-24 Online:2016-12-08 Published:2020-08-13

摘要/Abstract

摘要： 对交流电压下变压器油中柱板电极间气泡动力学特性进行了数值仿真研究。建立了交流电压下变压器油中气泡运动二维数值模型,通过麦克斯韦应力张量在气泡界面上的面积分求得气泡受到的电动力,通过气泡受力分析获得交流电场中不同位置释放后气泡的运动轨迹。计算结果显示在工频交流电场作用下,气泡在柱板电极间场强集中区域存在振荡平衡位置,不同大小的气泡对应的振动平衡位置比较接近,且处于柱板电极间场强集中区域。这意味着气泡有可能在该位置出现聚集,导致油间隙击穿电压的降低。

关键词: 气泡轨迹, 聚集, 变压器油, 电动力

Abstract: The dynamics of gas bubbles in transformer oil was theoretically explored. A numerical model was introduced for the bubble dynamics in the transformer oil under AC electric field. The electrodynamic force was calculated by integrating the Maxwell stress tensor on the surface of the bubble, and then the bubble trajectory was obtained through the force calculation of the bubble under the AC electric field. Notably, trajectories calculated indicate the bubble aggregation in concentrated area of the electric field between the needle-plane electrode, and different bubble radius will affect the trajectory of the bubble. Also, different bubble radiuses cause a small change in the equilibrium position of bubble between the electrodes. It is concluded that the bubble can play a catalytic role in the breakdown of the oil gap.

Key words: bubble trajectory, aggregation, transformer oil, electrodynamics force

中图分类号:

TM854

赵涛, 刘云鹏, 律方成, 刘山. 交流电场下变压器油中气泡动力学特性仿真[J]. 系统仿真学报, 2016, 28(12): 3081-3087.

Zhao Tao, Liu Yunpeng, Lü Fangcheng, Liu Shan. Bubble Dynamics Simulation in Transformer Oil under AC Electric Field[J]. Journal of System Simulation, 2016, 28(12): 3081-3087.

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交流电场下变压器油中气泡动力学特性仿真

Bubble Dynamics Simulation in Transformer Oil under AC Electric Field

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