电瓷避雷器Issue(3)：1-7,7.DOI:10.16188/j.isa.1003-8337.2025.03.001
考虑火花放电的垂直接地极排布方式散流特性研究
Scattering Characteristics of Vertical Earth Electrode Arrangement Considering Spark Discharge
摘要
Abstract
The impact grounding resistance of tower grounding device is one of the important parameters that affect the lightning resistance of transmission line.Vertical grounding electrode can be three-dimen-sional flow impact current,using the combination of horizontal grounding electrode and vertical grounding device often can play a good effect.Due to the change of vertical grounding pole arrangement,the current flowing in each conductor segment will also change,taking into account the soil spark discharge,which is bound to affect the equivalent radius of the grounding conductor.A transient circuit model of the ground-ing device which combines the vertical grounding pole with the horizontal grounding pole and considers the soil spark effect is established in this paper,and the equivalent radius of each grounding conductor is solved by this circuit model,so as to analyze the impact characteristics of this kind of composite ground-ing device.Combining with the actual analysis,the author presents an arithmetic arrangement of vertical grounding pole.Simulation results show that this arrangement can effectively improve the ability of the vertical grounding electrode scattering lightning current.At the soil resistivity of 150Ω·m,the impact grounding resistance of the earth device using the isometric arrangement is reduced by 2.4%compared with the traditional isometric arrangement,and the maximum current density distribution on the surface is reduced by 7.2%.关键词
接地装置/冲击特性/等差排布方式/火花放电/垂直接地极Key words
grounding device/impact performance/arithmetic arrangement/spark discharge/vertical earth electrode引用本文复制引用
王润璞,杨廷方,单淞译,谢泽龙,周慧康,周强辉..考虑火花放电的垂直接地极排布方式散流特性研究[J].电瓷避雷器,2025,(3):1-7,7.基金项目
国家自然科学基金(编号:51777015).Project supported by National Natural Science Foundation of China(No.51777015). （编号:51777015）
