连续雷电冲击下土壤恢复特性分析及仿真研究  

Analysis and Simulation of Soil Recovery Characteristics Under Continuous Lightning Strike

作　　者：刘石玉 周力行[1] 邓勇 LIU Shiyu;ZHOU Lixing;DENG Yong(Changsha University of Science&Technology,Changsha 410000,China)

机构地区：[1]长沙理工大学电气学院,长沙410000

出　　处：《电瓷避雷器》2023年第1期92-98,共7页Insulators and Surge Arresters

基　　金：国家自然科学基金项目(编号:52177015)。

摘　　要：根据对雷电现象的研究发现,闪电通常包含了多个回击。在多脉冲电流下,土壤特性不仅与击穿特性有关,还与电参数恢复有关。不同地区,不同季节土壤的含水量不同,雷击对接地电阻的影响差异很大。构建了连续冲击试验平台,对典型接地体进行连续冲击试验。对连续冲击电流下作用下不同含水量的土壤的放电特性进行了研究,根据实验结果,讨论了连续冲击电流下土壤电阻率的修正方法。最后以ATP-EMTP软件为仿真平台搭建了连续雷击下接地装置的仿真模型。According to research on the phenomenon of lightning,lightning usually consists of multiple strikes.Under multi-pulse current,soil properties are not only related to breakdown properties,but also to electrical parameter recovery.Different regions and different seasons have different soil moisture content,and the impact of lightning strikes on grounding resistance is very different.In this paper,a continuous impact test platform is constructed to conduct continuous impact tests on typical grounding bodies.The discharge characteristics of soils with different water contents under continuous impulse current are studied.According to the experimental results,the correction method of soil resistivity under continuous impulse current is discussed.Then,the simulation model of the grounding device under continuous lightning strike is built with ATP-EMTP software as the simulation platform.

关 键 词：连续雷电冲击 土壤含水量 土壤电阻率 冲击接地电阻 

分 类 号：S151.9[农业科学—土壤学] TM862[农业科学—农业基础科学]