输电线路杆塔分形外延接地网接地特性及影响因素研究  

Grounding Characteristics and Influencing Factors of Fractal Epitaxial Grounding Grid of Transmission Line Tower

作　　者：杨剑飞 姜志鹏 舒胜文[3] 胡元潮[1] 苏小乐 刘伟 YANG Jianfei;JIANG Zhipeng;SHU Shengwen;HU Yuanchao;SU Xiaole;LIU Wei(Electrical and Electronic Engineering College,Shandong University of Technology,Zibo 255000,China;State Grid Hubei Ezhou Power Supply Company,Ezhou 436000,China;School of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000 [2]国网湖北省电力有限公司鄂州供电公司,湖北鄂州436000 [3]福州大学电气工程与自动化学院,福建福州350108

出　　处：《智慧电力》2023年第7期1-8,38,共9页Smart Power

基　　金：国家自然科学基金资助项目(52207150);国网湖北省电力有限公司科技项目(B315F0222836)。

摘　　要：降低输电杆塔接地电阻是减少雷击跳闸事故的重要措施,而山区等地势复杂区域存在传统外延接地网施工困难、土壤电阻率高等问题。提出基于分形理论的分形外延接地网敷设方案。采用有限元仿真软件建立分形外延接地网模型,研究角度、分形维数、分形层数等因素对接地电阻、分流系数的影响,并比较典型外延接地网的接地特性。研究表明,适中的角度、较小的分形维数及分形层数有利于促进分形外延接地网散流降阻。该研究可为地势复杂且土壤电阻率高的山区等区域输电线路杆塔接地设计提供参考。Reducing the grounding resistance of transmission line tower is an important measure to reduce lightning trip accidents,but there are problems,such as the traditional epitaxial grounding grid construction difficulties and high soil resistivity in mountainous areas and other complex terrain.Therefore,a fractal epitaxial grounding grid laying scheme based on fractal theory is proposed.The finite element simulation software is used to establish the fractal epitaxial grounding grid model,and the influence of angle,fractal dimension,fractal layer number and other factors on grounding resistance and shunt coefficient is studied.At the same time,the grounding characteristics of fractal epitaxial grounding grid and typical epitaxial grounding grid are compared.The results show that the medium angle,small fractal dimension and small fractal layer number are beneficial to the improvement of current dispersion and grounding resistance reduction characteristics of the fractal epitaxial grounding grid.This study can provide reference for the grounding design of transmission line towers in mountainous areas with complex terrain and high soil resistivity.

关 键 词：分形理论 柔性石墨 分流系数 外延接地网 接地电阻 

分 类 号：TM862[电气工程—高电压与绝缘技术]