套管油纸绝缘受潮与老化的介电响应非线性特性和辨识方法  

Nonlinear characteristics of dielectric response and identification method of moisture and aging of oil-paper insulated bushing

作　　者：张大宁 梁兆杰 李璇 田杰 穆海宝[1] 张冠军[1] ZHANG Da-ning;LIANG Zhao-jie;LI Xuan;TIAN Jie;MU Hai-bao;ZHANG Guan-jun(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;Shenzhen Power Supply Co.,Ltd,Shenzhen 518000,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049 [2]深圳供电局有限公司,广东深圳518000

出　　处：《电机与控制学报》2022年第6期18-30,共13页Electric Machines and Control

基　　金：国家自然科学基金(52107165);陕西省重点研发计划(2022GY-269);西安市碑林区科技计划项目(GX2124)。

摘　　要：介电响应作为油纸绝缘的新型无损诊断方法,具有内含绝缘信息丰富,不破坏绝缘等优点,因而受到国内外广泛关注。油纸绝缘受潮和老化时表现出相近的介电响应特征,对该方法的推广应用造成了困难。本文旨在研究变电压激励下油纸绝缘变压器套管的介电响应非线性特性与绝缘状态辨识方法。首先研究了受潮油纸样品非线性介电响应的机理与模型,进一步研究了热老化油纸绝缘的非线性介电响应特性与典型特征量,最终建立油纸绝缘非线性损耗峰、老化程度、含水量之间的关系式,并对油纸受潮与热老化并存时FDS特征规律进行验证,实现了套管油纸绝缘受潮与老化的状态评价与区分。Dielectric response has the advantages of rich insulation information and no damage to insulation. As a new nondestructive diagnosis method of oil paper insulation, it has attracted extensive attention at home and abroad. Oil paper insulation shows similar dielectric response characteristics when affected by moisture and aging, which makes it difficult to popularize and apply this method. This paper is to study the nonlinear characteristics of dielectric response and insulation state identification method of oil paper insulated transformer bushing under variable voltage excitation. The mechanism and model of the nonlinear dielectric response of damp oil paper samples were investigated, followed by a study of the nonlinear dielectric response traits and characteristic quantities of thermally aging oil paper insulation. The relationship was established between oil paper insulation nonlinear loss peak, aging degree and water content, and the state evaluation and differentiation of moisture and aging of bushing oil paper insulation was realized.

关 键 词：油纸绝缘 套管 介电响应 绝缘老化 绝缘受潮 绝缘辨识 

分 类 号：TM855[电气工程—高电压与绝缘技术]