摘要
针对双层土壤下线缆在复杂电磁环境中的电磁防护,采用了电磁波在介质中的传输理论,推导出电磁脉冲透过双层土壤的透射系数表达式,根据该表达式计算出双层土壤下线缆的激励电场,然后结合传输线方程计算出线缆的感应电流,对比CST软件仿真的结果,验证了双层土壤透射系数表达式的有效性。在此基础上研究了上层介质厚度、湿度、环境以及布线深度对埋地线缆上感应电流的影响。结果表明,上层介质厚度对线缆的感应电流影响较小,但上层介质的湿度、环境以及布线深度对线缆的感应电流影响较大。
For the electromagnetic protection of double⁃layer buriedcables in thecomplex electromagnetic environment,the transmission theory of electromagnetic wave in medium is adopted to derive the expression of transmission coefficient of electromagnetic pulsethrough double⁃layer soil.The excitation electric field of double⁃layer buriedcable is calculatedaccording to the expression,and then the induced current of cables is calculatedaccording to the transmission line equation.Compared with the results of CST software simulation,the validity of the expression of transmission coefficient of double⁃layer soil is verified.On this basis,the effects of the upperlayeredsoilthickness,upper layeredsoil humidity,upper layeredsoil environment and wiring depth on the induced current of buried cables are studied.The results show that the thickness of the upper layer medium has little effect on the induced current of the cable,but the upperlayeredsoilhumidity,upper layeredsoil environment and wiring depth have a greater effect on the induced current of the cable.
作者
刘峻林
徐荣青
LIU Junlin;XU Rongqing(College of Electronic and Optical Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)
出处
《电子设计工程》
2023年第9期99-103,108,共6页
Electronic Design Engineering
基金
国家青年自然科学基金(61905117)。
关键词
核电磁脉冲
埋地线缆
耦合效应
数值仿真
土壤特性
nuclear electromagnetic pulse
buried cables
coupling effect
numerical simulation
soil characteristics
