Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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不同温度条件下油浸式套管绝缘特性研究

来源:电体育下注网站电体育下注平台发布时间:2020-05-14 14:14 浏览次数:22
不同温度条件下油浸式套管绝缘特性研究
 
孙长海1,马塽1,陈晨2,宋文卓2,鞠爽1,李天明1
(1 大连理体育下注网站大学 电体育下注平台体育下注网站程学院,辽宁 大连 116024;2 国网河南省电力公司经济技术研究院,河南 郑州 450052)
 
    摘 要:针对油浸式套管绝缘性能下降的问题,使用频率响应分析仪IDAX300进行不同温度条件下油浸式套管的频域介电实验,同时使用Materials Studio软件建立不同温度梯度下绝缘纸纤维素以及油纸结构模型进行分析,通过微观机理的研究对宏观实验进行解释。结果表明:在10-2 ~ 10 Hz频率段,套管的频谱曲线随温度的增加呈上升的变化规律。通过对绝缘纸纤维素、油纸结构的分子模拟知,随着模拟温度的增加,两者的均方位移呈增加的变化规律,径向分布函数第一峰值呈下降的变化规律,同时对模拟的平衡状态进行分析,随着温度的增加,导致油浸式套管绝缘特性下降的主要原因有绝缘纸纤维素链的断裂、绝缘油的裂解、油纸结构的松散以及水分子扩散程度的加大。
    关键词:油浸式套管;频域介电法;分子模拟;不同温度条件
    中图分类号:TM216+.5     文献标识码:A     文章编号:1007-3175(2020)05-0017-07
 
Research on Insulation Characteristics of Oil-Immersed Bushing at Different Temperatures
 
SUN Chang-hai1, MA Shuang1, CHEN Chen2, SONG Wen-zhuo2, JU Shuang1, LI Tian-ming1
(1 School of Electrical Engineering, Dalian University of Technology, Dalian 11 6024, China;
2 State Grid Henan Electric Power Company Economic Technology Research Institute, Zhengzhou 450052, China)
 
    Abstract: Aiming at the problem of decreasing the insulation performance of oil-immersed bushings, the frequency response dielectric test of oil-immersed bushings under different temperature conditions was carried out using frequency response analyzer IDAX300, at the same time, the Materials Studio software was used to establish the insulation paper cellulose and oil paper structure models under different temperature gradients for analysis, and the macro experiments were explained through the study of micro mechanisms.The result shows that: In the frequency range of 10-2~10 Hz, the spectral curve of the bushing increases with the increase of temperature. Through molecular simulation of cellulose and oil-paper structure of insulating paper, as the simulation temperature increases, the mean square displacement of the two is increasing and the first peak of radial distribution function is decreasing.Meanwhile, the simulated equilibrium state is analyzed, with the increase of temperature, the main reasons leading to the decrease of the insulation properties of oil-immersed bushings are the breakage of the cellulose chain of the insulating paper, the cracking of the insulating oil, the looseness of the oil-paper structure and the increase in the diffusion of water molecules.
    Key words: oil-immersed bushing; frequency domain dielectric method; molecular simulation; different temperature conditions
 
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