高空核爆电磁脉冲晚期效应对变压器的影响  

Effect of strong electromagnetic pulse E3 environment on transformer

作　　者：田君杨 蒋连钿 李海勇 沈梓正 冯瑞发 祁汭晗 刘磊 TIAN Junyang;JIANG Liandian;LI Haiyong;SHEN Zizheng;FENG Ruifa;QI Ruihan;LIU Lei(Guangxi Power Grid Power Dispatching and Control Center,Guangxi 530013,China;China Southern Power Grid Research Institute,Guangzhou 510799,China)

机构地区：[1]广西电网电力调度控制中心,南宁530013 [2]南方电网科学研究院,广州510799

出　　处：《电波科学学报》2024年第5期870-877,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金联合基金(U23B20132);南方电网公司科技项目(046000KK52210030)。

摘　　要：高空核爆电磁脉冲晚期效应(即E3效应)产生的直流偏磁严重影响电力设备的正常运行,甚至导致供电系统瘫痪。针对此现象,本文模拟高空核爆电磁脉冲晚期环境,建立变压器模型,开展直流偏磁对变压器影响的综合分析,包括变压器内部的振动位移、变压器声压级以及变压器内部铁芯的温度增长等。仿真结果表明,随着高空核爆电磁脉冲E3效应在变压器引入的电流增大,变压器铁芯产生的位移、噪声声压级、铁芯温升快速增大,且值极有可能超过变压器的相关阈值,从而对变压器造成损坏。本文可为变压器的安全运行提供理论支撑。The late effect of high-altitude nuclear electromagnetic pulse(E3 effect)seriously affects the operation of power equipment and even paralyzes the power supply system by generating DC bias magnetism.In view of this phenomenon,this paper simulates the late environment of high-altitude nuclear electromagnetic pulse,establishes a transformer model,and carries out a comprehensive analysis of the impact of DC bias on the transformer,including the vibration displacement inside the transformer,the sound pressure level of the transformer,and the temperature increase of the core inside the transformer.The simulation results show that with the increase of the current introduced into the transformer in the E3 stage of the nuclear explosion electromagnetic pulse,the displacement,noise and sound pressure and temperature rise of the transformer core will increase rapidly,and it is very likely to exceed the relevant threshold of the transformer,thus causing damage to the transformer.

关 键 词：高空核爆电磁脉冲晚期效应 三相双绕组变压器 振动 噪声 温升 

分 类 号：O441.5[理学—电磁学]