基于ATP-EMTP的杆塔接地装置冲击接地电阻仿真研究  

Simulation Study on Impulse Grounding Resistance of Tower Grounding Device Based on ATP-EMTP

作　　者：王思捷 黄松 赵海龙 WANG Sijie;HUANG Song;ZHAO Hailong(Electric Power Research Institute of Hainan Power Grid Corporation,Haikou 570311;Key Laboratory of Physical and Chemical Analysis for Electric Power of Hainan Province,Haikou 570311)

机构地区：[1]海南电网有限责任公司电力科学研究院,海口570311 [2]海南省电网理化分析重点实验室,海口570311

出　　处：《计算机与数字工程》2020年第5期1258-1263,共6页Computer & Digital Engineering

摘　　要：杆塔的冲击接地电阻是反映接地装置雷电冲击特性的一项重要指标。首先搭建了接地体的π型等值电路模型。接着以ATP-EMTP软件为仿真平台搭建了接地装置仿真模型。然后仿真分析了雷电流注入点、雷电流幅值大小、接地装置长度及土壤电阻率对典型接地装置冲击接地电阻的影响。结果表明:雷电流注入点数增加会使接地电阻值略微下降;在一定范围内增加接地装置的长度能降低接地电阻;高、低土壤电阻率下的冲击接地电阻的差别会随雷电流幅值的增大而缩小。最后选取了一组实际输电线路杆塔的接地装置,对8个冲击接地电阻进行了仿真,分析了其在实际应用中的接地性能,并给出了改进建议。The impact grounding resistance of the tower is an important indicator reflecting the lightning impulse characteristics of the grounding device.Theπ-equivalent circuit model of the grounding device is built first.Then the grounding device simulation model is built with ATP-EMTP software.And the effects of lightning current injection point,lightning current amplitude,grounding device length and soil resistivity on the grounding resistance of typical grounding devices are analyzed.The results show that increasing the number of lightning current injection points will slightly reduce the grounding resistance value.Increasing the length of the grounding device within a certain range can reduce the grounding resistance more.When increase of the lightning current amplitude,the differences of the grounding resistance will decrease while the soil resistivity is different.Finally,a set of grounding devices of actual transmission line towers are simulated,eight impact grounding resistances are calculated,and the grounding performance in practical applications is analyzed and suggestions for improvement are given.

关 键 词：杆塔接地装置 冲击接地电阻 雷电流 土壤电阻率 ATP-EMTP 仿真研究 

分 类 号：TM862[电气工程—高电压与绝缘技术]