纳米粒子对油纸复合绝缘系统影响的试验与仿真  

Experiment and Simulation of the Effect of Nanoparticles on Oil-Paper Composite Insulation System

作　　者：施健 罗兵 司马文霞[2] 蔡汉生 

机构地区：[1]南方电网科学研究院,广州510080 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《南方电网技术》2015年第3期51-56,共6页Southern Power System Technology

基　　金：国家重点基础研究发展计划项目(973计划)(2009CB724504)~~

摘　　要：传统变压器油纸复合介质已不能满足特高压等级对大容量、小型化绝缘系统的要求。为得到高性能的油纸绝缘系统,开展了纳米改性的油纸复合绝缘系统的试验和仿真研究,对比测试了有无添加纳米粒子的油纸复合绝缘的操作冲击击穿电压,建立了油纸系统下油中流注的发展模型,基于该模型,计算了沿面流注通道内的电场、空间电荷和绝缘纸表面沿面电荷分布。研究表明,纳米粒子改性的油纸系统的耐压性能较传统油纸系统有10%左右的提高,纸绝缘的面电荷密度从0.020 C/m2降为0.016 C/m2,纳米粒子可以抑制油中流注和沿面流注的发展,从而提高了油纸复合介质的绝缘性能。Traditional transformer oil-paper composite insulation is becoming increasingly difficult to meet the demands of insulation system with large capacity and miniaturization at ultra-high voltage level. To improve the insulation properties of oil-paper insulation, the effect of nanoparticles on insulation properties of oil-paper composite insulation system is investigated. The withstand voltages of traditional and nanoparticle modifying oil-paper composite system are tested and compared. The streamer discharge in transformer oil is simulated. Based on the model, the electric field and space charge distributions, and the surface charge density on the paper insulation are obtained and analyzed in this paper. The results show that the nanoparticle modifying transformer oil-paper system has better insula-tion property than the traditional oil-paper system （10% increase） and the surface charge density decreases from 0. 020 C/m2 in pure oil-paper system to 0. 016 C/m2 in nanoparticle modified oil-paper system. The nanoparticles in transformer oil not only restrain the streamer development in the oil, but also restrain surface streamer and decrease the surface charge density on the paper insulation, which are beneficial for the improvement of the oil-paper insulation.

关 键 词：变压器油 冲击绝缘性能 流注 面电荷 纳米改性 油纸复合绝缘 

分 类 号：TM863[电气工程—高电压与绝缘技术]