变压器纳米改性油纸复合绝缘研究综述  

Research Overview of Oil-Paper Composite Insulation Modified by Nano Particles for Transformer

作　　者：刘道生 周春华 丁金 叶敬 杜伯学 Liu Daosheng;Zhou Chunhua;Ding Jin;Ye Jing;Du Boxue(School of Electrical Engineering and Automation Jiangxi University of Science and Technology,Ganzhou,341000,China;Huaneng Qinmei Ruijin Power Generation Co.Ltd,Ganzhou,341000,China;School of Electrical and Information Engineering Tianjin University,Tianjin,300072,China)

机构地区：[1]江西理工大学电气工程与自动化学院,赣州341000 [2]华能秦煤瑞金发电责任有限公司,赣州341000 [3]天津大学电气自动化与信息工程学院,天津300072

出　　处：《电工技术学报》2023年第9期2464-2479,2490,共17页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(52167017);江西省研究生创新专项项目(YC2021-S584)资助。

摘　　要：油纸复合绝缘作为电力变压器内部的主要绝缘,其电气性能备受电力设备制造与运行人员的关注。纳米颗粒结构因具有大比表面积、量子尺寸及宏观量子隧道效应等优异性能,常作为提高绝缘材料电气性能的添加物质。该文总结了近年来变压器油纸复合绝缘纳米改性的研究成果,首先概述变压器油纸复合绝缘纳米改性的方法;其次详细介绍三种纳米颗粒改性机理的理论模型,并分析改性前后绝缘油纸内部与表面的电荷行为、局部放电特性和交直流复合及雷电冲击电压下的击穿特性;最后对目前研究成果进行总结,并展望未来变压器油纸绝缘纳米改性的研究和发展方向。这些研究成果的总结将为改性油纸绝缘的发展与电气性能改善提供参考和借鉴。As the main internal insulation of power transformer,the electric performance of oil-paper composite insulation is concerned by power equipment manufacturers and operators.It is of great significance to improve the performance of oil-paper composite insulation,reduce the probability of insulation damage and improve the reliability of transformer insulation.The nanoparticles are often used as additives to improve the electrical properties of insulating materials due to their excellent physical properties,such as large specific surface area,quantum size and macroscopic quantum tunneling effects.Based on them,the recent research achievements of nano-modification of transformer oil-paper composite insulation are summarized.The modification methods of oil-paper composite insulation system for power transformer in recent years are introduced.Then the three kinds of theoretical models to explain the modification mechanism of nanoparticles are introduced.What’s more,the charge behaviors inside and on the surface of oil-paper before and after modification are analyzed,as well as the partial discharge and the breakdown characteristics under AC/DC and lightning impulse voltage.Finally,the present research achievements are summarized.Moreover,the development direction of transformer oil-paper insulation nano-modification is prospected.Firstly,the method of nano-modified oil-paper composite insulation for transformer is summarized.One-step and two-step methods are usually used to prepare nano-modified transformer oil.The preparation of nano-modified cellulose paper can be divided into chemical modification and physical modification.Secondly,the three kinds of theoretical models for the modification mechanism are particle surface capture model,spatial polarization potential well model and trap model,respectively.These three kinds of models have their own distinct advantages and certain limitations.However,trap model is more persuasive,which is the most widely used at present.In terms of universality,this method not only can

关 键 词：电力变压器 纳米改性 油纸复合绝缘 电荷特性 

分 类 号：TM215[一般工业技术—材料科学与工程]