输电线缆耦合强电磁脉冲特性的分析  

Characteristics of Power Transmission Cable Coupled Strong Electromagnetic Pulse

作　　者：李祥超[1] 王贤超 LI Xiangchao;WANG Xianchao(School of Meteorological Disaster and Emergency Management,Nanjing University of Information Science&Technology(NUIST),Nanjing 210044,China)

机构地区：[1]南京信息工程大学气象灾害与应急管理学院,南京210044

出　　处：《电瓷避雷器》2024年第5期1-11,共11页Insulators and Surge Arresters

基　　金：国家重点研发计划[编号:2017YF(1501505)]。

摘　　要：针对输电线缆耦合强电磁脉冲感应过电压的问题,利用有界波模拟器产生2.3/23ns的电场波形,对LGJ和ZR-VVR两种架空输电线缆进行耦合实验,用直接实验法分析其不同条件下耦合到的感应过电压特征和差别。试验结果表明:电场强度在10kV/m以下时,这两种输电线缆耦合到的电压随着电场强度的增加而增大并近似为线性增加;电压波形近似为阻尼振荡,振荡周期为纳秒级;输电线缆耦合到的电压会随着架空高度、入射仰角、横截面积、耦合长度的增大而增大。在输电线缆近端负载接50Ω阻抗匹配时,耦合到的电压和能量最大;而接储能元件电感器和电容器时基本上没有很大差别。Aiming at the problem of overvoltage induced by coupling strong electromagnetic pulse with a single transmission cable,the bounded wave simulator is used to generate an electric field waveform of 2.3/23 ns.The coupling tests of LGJ and ZR-VVR overhead transmission cables are carried out,and the characteristics and differences of induced overvoltage coupled under different conditions are analyzed by direct test method.The test results show that when the electric field intensity is below 10 kV/m,the voltage coupled to the two transmission cables increases with the increase of electric field intensity and increases approximately linearly;The voltage waveform is approximately damped oscillation,and the oscillation period is nanosecond;The voltage coupled to the transmission cable will increase with the increase of overhead height,incident elevation,cross-sectional area and coupling length.When the load at the near end of the transmission cable is connected with 50Ωimpedance matching,the coupled voltage and energy are the largest;When connecting the energy storage element such as inductor and capacitor,there is basically no great difference.

关 键 词：输电线缆 强电磁脉冲 耦合特性 感应过电压 

分 类 号：TM75[电气工程—电力系统及自动化]