摘要
本文主要对接地极为等间距布置情况下的大型地网进行大量建模,模拟在均匀土壤中,不同管壁厚度、不同接地极半径、有无垂直接地极的情况下,地网的各项电气参数变化规律。结果表明,铜材作为地网接地极金属材料时,接地极半径的大小对地网各项电气参数的影响较大,且几乎是按正比例增长,但内半径的改变对地网各项电气参数的影响很小。垂直接地极的使用会明显地降低地网跨步电压、接触电压及接地电阻。通过公式计算的方法对仿真结果进行了验证,为地网经济、安全合理地建设提供有效的理论依据。
This article mainly models a large grounding network with equidistant grounding electrodes,simulating the changes in various electrical parameters of the grounding network in uniform soil with different pipe wall thicknesses,grounding electrode radius,and the presence or absence of vertical grounding electrodes.The results show that when copper was used as the grounding electrode metal material for the grounding grid,the radius of the grounding electrode had a significant impact on various electrical parameters of the grounding grid,and it increased almost proportionally.However,changes in the inner radius had little effect on various electrical parameters of the grounding grid.The use of vertical grounding electrodes significantly reduce the step voltage,contact voltage,and grounding resistance of the grounding grid.The simulation reduced were verified through formula calculation,providing effective theoretical basis for the economical,safe and reasonable construction of the grounding network.
作者
李科林
梁仕斌
万雄彪
王陈喜
李茂昌
LI Kelin;LIANG Shibin;WAN Xiongbiao;WANG Chenxi;LI Maochang(Yunnan Electric Power Test and Research Institute(Group)Co.,Ltd.,Kunming 650000,China;Nujiang Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Nujiang 673100,China)
出处
《电工材料》
2025年第6期95-99,共5页
Electrical Engineering Materials
关键词
等间距地网
均匀土壤
跨步电压
仿真
垂直接地极
equidistant grounding network
uniform soil
step voltage
simulation
vertical grounding electrodes
