变压器油中气泡杂质相局部放电特性研究综述  

Review on Partial Discharge Characteristics of Bubble Impurity Phase in Transformer Oil

作　　者：张宁[1] 刘士利 郝建[2] 陈厚合 Zhang Ning;Liu Shili;Hao Jian;Chen Houhe(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education Northeast Electric Power University,Jilin 132012 China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing University,Chongqing 400044 China)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林132012 [2]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044

出　　处：《电工技术学报》2023年第10期2757-2776,共20页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金创新研究群体基金资助项目(51321063)。

摘　　要：变压器油道中的悬浮气泡受电磁场、温度场和流场的综合作用,呈现出极其复杂的形态演变、运动规律和放电过程,严重威胁变压器油的绝缘性能,因此研究变压器油中气泡放电机制具有重要意义。目前,国内外学者已在该领域取得了大量的研究成果,该文重点回顾了相关研究人员近二十年对含气泡变压器油局部放电特性的探索,以研究手段为主线,分别从理论分析、仿真模拟及试验测试三个角度对现有成果进行了系统地梳理和论述,研究内容涵盖气泡放电机理与模型、动力学行为及放电试验特性等,但总体来看,含气泡变压器油绝缘失效机制的研究仍面临诸多科学问题与挑战。在此基础上,该文结合分子模拟、多物理场耦合及数字孪生等理论和技术展望了含气泡变压器油绝缘性能的潜在研究方向。As the core equipment in the transmission and transformation system,large power transformers assume the key role of transforming voltage and transmitting electric energy.However,with the widespread use of large-capacity oil-immersed power transformers,their operating temperature rises and the oil-paper insulation system tends to become more complex,leading to a gradual increase in the chances of moisture in the oil-immersed insulation paper,decomposition of fiber molecules breaking chains and aging of transformer oil insulation,all of which promote the precipitation of suspended bubbles in the oil channel.These bubbles,under the combined effect of electromagnetic,thermal and fluid fields,show extremely complex morphological evolution and movement patterns,resulting in partial bubble discharge and subsequent oil channel breakdown,which has been one of the main factors threatening the insulation performance of transformers.A large number of research results have been obtained by domestic and foreign scholars for the exploration of bubble partial discharge characteristics in transformer oil.It has been shown that the electrohydrodynamic behavior of the gas-liquid two-phase flow in transformer oil and the dielectric discharge mechanism are closely related,and the precise description and quantitative expression of the bubble and transformer oil discharge phenomena and laws require the precise capture of the key characteristic physical quantities in the discharge process.However,the detailed microscopic mechanism of transformer oil insulation failure is still unclear due to the limitations of current scientific and technological means and applied mathematical methods,and thus the discharge evolution of transformer oil containing bubbles cannot be accurately characterized.This paper reviews the research on partial discharge characteristics of transformer oil with bubbles in the past two decades,and systematically reviews and discusses them from three perspectives:theoretical analysis,simulation models and experimental t

关 键 词：变压器油 悬浮气泡 放电特性 动力学行为 绝缘失效 

分 类 号：TM216[一般工业技术—材料科学与工程]