电力架空线路与管道交叉点雷电冲击防护措施研究  

Safety Protection Measures of Lightning Strike at the Intersection of Overhead Line and Pipeline

作　　者：高晓晶 胡元潮[2] 姜志鹏 柯方超 周秋鹏 段志强 周蠡 GAO Xiaojing;HU Yuanchao;JIANG Zhipeng;KE Fangchao;ZHOU Qiupeng;DUAN Zhiqiang;ZHOU Li(State Grid Hubei Power Supply Limited Company,Economic&Technology Research Institute,Wuhan 430000,China;Electrical and Electronic Engineering College,Shandong University of Technology,Zibo 255000,China;State Grid Hubei Power Supply Limited Company Ezhou Power Supply Company,Ezhou 436000,China)

机构地区：[1]国网湖北省电力有限公司经济技术研究院,武汉430000 [2]山东理工大学电气与电子工程学院,山东淄博255000 [3]国网湖北省电力有限公司鄂州供电公司,湖北鄂州436000

出　　处：《电瓷避雷器》2022年第1期22-28,共7页Insulators and Surge Arresters

基　　金：山东省自然科学基金(编号:ZR2016EEQ20);国网湖北省电力有限公司科技项目(编号:SGTYHT18JS208)。

摘　　要：随着综合能源走廊修建,电力架空线与油气管道交叉跨越情形时有发生,电力架空线在雷电袭击时会影响周围的埋地油气管道,此种情况下雷电冲击安全防护措施研究极为重要。本研究通过COMSOL Multiphysics有限元软件对混凝土桩基加设人工接地体方案进行建模计算,分析了土壤电阻率、外延接地体长度对管道电位的影响,对比了人工接地体与混凝土桩基钢筋导体的散流作用。针对杆塔水平与垂直方向接地体"引流"对临近管道电位的影响,提出了管道临近处杆塔接地网散流优化方案,并分析了杆塔接地网散流结构优化前后临近管道过电压的防护效果。仿真计算表明:在50~1200Ω·m土壤电阻率下,本研究所述两种桩基垂直接地散流优化方案均满足接地标准限值且裕量较大,能够降低临近管道电位及绝缘层耐受电压,减少电力线路临近处管道安全防护施工及材料成本。With the construction of comprehensive energy corridors,overhead power lines often cross the pipeline.Overhead power lines will affect surrounding buried oil and gas pipelines during lightning strikes.In this case,the research on lightning protection measures is extremely important.COMSOL multiphysics software is used for modeling and calculation,and the effects of soil resistivity and the length of epitaxial grounding electrode on pipeline potential are analyzed.The dispersion effects of the artificial grounding electrode and the metal of the concrete tower foundation were compared.According to the influence of current in horizontal and vertical grounding electrode on pipeline potential,an optimal scheme is put forward for the current dispersion of tower grounding grid near the pipeline,and the effect of dispersion structure optimization used in pipeline overvoltage protection is analyzed.The simulation results show that:in 50~1200Ω·m soil resistivity,two kinds of tower foundation vertical grounding flow optimization plans can meet the standard limits with enough margin,the optimization plans can reduce pipeline voltage and insulation resistance voltage,at the same time,the plan can reduce the cost of pipeline safety protection and material near the power line.

关 键 词：雷击 油气管道 混凝土桩基 接地网结构 

分 类 号：TM863[电气工程—高电压与绝缘技术]