纳米TiO_(2)改性纤维素纸板在油流环境下的带电特性研究  

Study on Electrification Characteristics of Cellulose Pressboard Modified by Nano⁃TiO_(2)in Oil⁃flow Environment

作　　者：刘道生[1] 王广康 牛腾霄 LIU Daosheng;WANG Guangkang;NIU Tengxiao(School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Jiangxi Ganzhou 341000,China)

机构地区：[1]江西理工大学电气工程学院与自动化学院,江西赣州341000

出　　处：《高压电器》2024年第2期169-177,共9页High Voltage Apparatus

基　　金：国家自然科学基金(52167017);江西省自然科学基金项目(20192ACBL20016)。

摘　　要：经纳米TiO_(2)改性纤维素纸板可以增强其击穿场强与抗老化性能,是当前电气绝缘领域研究的热点。纸板中添加纳米粒子对于变压器油流带电影响仍不明确;因此,为了揭示纳米粒子对油流带电影响与抑制机理,需测量与分析纳米改性纸板中的油流带电特性。文中以TiO2改性纸板与未改性矿物油为研究对象,通过旋转圆盘系统测量其摩擦产生的静电电流。根据控制变量法研究了温度、纳米粒子质量分数和流速等因素对带电程度的影响,分析了纳米粒子对于油流带电影响机理;采用有限元分析方法分析了变压器油道仿真模型,对比了不同质量分数下的纳米TiO_(2)改性纸板制作的油道模型内部电场分布情况。研究结果表明:与未改性纸板相比,纤维素基体中添加质量分数为1%的纳米TiO_(2)粒子可以抑制油流带电程度,使得油道内部积累电荷后的电场分布畸变程度最小。研究结果可以为抑制变压器中的油流带电提供新方法。Cellulose pressboard by nano⁃TiO_(2)modification can enhance its breakdown field strength and anti⁃aging performance and is presently the research hot spot in the field of electrical insulation.However,it is still unclear how the nanoparticles in the pressboard affect the energization of transformer oil flow.In order to reveal the energiza⁃tion influence and suppression mechanism of nanoparticles in oil flow,it is necessary to measure and analyze the oil flow energization characteristics in the pressboard by nano⁃TiO_(2)modification.In this paper,the pressboard by nano⁃TiO_(2)modification and the unmodified mineral oil are taken as the research objects,and the electrostatic current is measured by rotating a disk system.Based on the control variation method,the influence of temperature,nano parti⁃cle mass fraction and flow rate on the energization degree is studied,and the mechanism of nanoparticles on the en⁃ergization of oil flow is analyzed.The finite element analysis method is used to analyze the simulation model of the transformer oil duct,and the electric field distribution in the transformer oil duct,which is made with the pressboard by nano⁃TiO_(2)modification with different contents,is compared.The research results show that,compared with the unmodified pressboard,the addition of 1%nano⁃TiO_(2)particles in cellulose pressboard can inhibit the energization of oil flow and minimize the electric field distortion after the accumulated energization in the oil duct.The research results in this paper can provide a new method for suppressing the oil flow energization in transformer.

关 键 词：纳米改性 油流带电测量 有限元分析 绝缘纸板 电场分布 

分 类 号：TM855[电气工程—高电压与绝缘技术] TS761.2[轻工技术与工程—制浆造纸工程]