油纸电容式套管主绝缘的介电特性与结构设计  

Dielectric Properties and Structural Design of Main Insulation for Oil-Impregnated Paper Capacitive Bushing

作　　者：刘道生 邹彬 陈星蓉 王仕会 LIU Daosheng;ZOU Bin;CHEN Xingrong;WANG Shihui(School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学电气工程与自动化学院,江西赣州341000

出　　处：《湖南电力》2023年第2期19-23,共5页Hunan Electric Power

基　　金：国家自然科学基金(52167017);江西省自然科学基金(20224BAB204054)。

摘　　要：油纸电容式套管作为变压器的核心载流元件之一,具有支撑、引流和绝缘等功能,其绝缘性能对于变压器运行的稳定性和安全性至关重要。为了减少油纸电容式套管运行过程中油纸局部放电引起的绝缘故障,采用纳米调控技术提高套管主绝缘油浸绝缘纸介电与电气性能。以20 kV油纸电容套管为研究对象,采用仿真与试验相结合的方法,探究纳米粒子对套管芯子主绝缘电场分布及局部放电起始电压的影响。研究结果表明,纳米TiO_(2)粒子能够改善绝缘纸表面微观结构,降低介电常数和套管芯子中电场强度峰值,提高套管芯子局部放电起始电压,为改善油纸电容式套管绝缘性能提供参考。Oil-impregnated paper capacitive bushing,as one of the core current-carrying components of a transformer,has functions of support,current diversion and insulation.The insulation performance is crucial to the stability and safety of transformer operation.In order to reduce insulation faults caused by oil-paper partial discharge during the operation of oil-immersed paper bushings,this paper adopts nano-modulation technology to improve the dielectric and electrical properties of oil-immersed insulating paper for the main insulation of bushings.Taking 20 kV oil-paper capacitor bushing as the research object,a combination of simulation and experiment is used to investigate the effect of nanoparticles on the electric field distribution and partial discharge initial voltage of the main insulation of the casing core.The experimental results show that the nano-TiO2 particles can improve the surface microstructure of insulating paper,reduce the relative dielectric constant and the peak electric field intensity in the casing core,and increase the partial discharge initial voltage of the casing core.This provides a reference for improving the insulation performance of oil-paper capacitive bushings.

关 键 词：纳米TiO_(2) 有限元分析 油纸电容式套管 局部放电起始电压 

分 类 号：TM855[电气工程—高电压与绝缘技术]