摘要
为明确接地网外延射线结构对其引流作用的影响,提出降低由雷电自然灾害所引起的输电杆塔临近处的油气管道过电压防护措施,采用防雷计算软件CDEGS建立电力杆塔接地网与其临近管道的结构模型,研究在不同电流幅值、土壤电阻率和杆塔与管道间距条件下,接地网外延射线迫近、背离和平行等3种结构对管道电位的影响,以及采取续接方案后管道过电压的变化情况。研究结果表明:外延射线的引流能力在迫近、平行和背离状态下对管道雷电过电压的影响呈现出不同的趋势;采取续接方案后,管道过电压出现明显降低趋势;外延射线续接方案可作为管道雷电过电压的防护措施。
In order to study influence of epitaxial ray structure of grounding grid on its drainage,protection measures were proposed to reduce overvoltage of oil and gas pipelines near transmission towers caused by the natural disaster of lightning.Firstly,lightning protection calculation software CDEGS was used to build a structural model of grounding grid and nearby pipelines.Then,influence of epitaxial rays in three states,namely approaching,deviating and parallel,on pipelines'potential was studied in conditions of different current amplitude,soil resistivity and pole tower and pipeline spacing,and variation law of pipeline overvoltage after adoption of continuation scheme was explored.The results show that influence of drainage capacity of epitaxial rays at three states on lightning overvoltage of pipelines shows different trends.After adoption of continuation scheme,the overvoltage is significantly reduced,therefore this scheme can be used as a protection measure against pipeline lightning overvoltage.
作者
胡元潮
刘乐
安韵竹
向真
黄涛
吕启深
HU Yuanchao;LIU Le;AN Yunzhu;XIANG Zhen;HUANG Tao;LYU Qishen(Electrical and Electronic Engineering College,Shandong University of Technology,Zibo Shandong 255000,China;Shenzhen Power Supply Co.,Ltd.,Shenzhen Guangdong 518000,China;State Grid Jiangsu Power Engineering Consulting Limited Company,Nanjing Jiangsu 210000,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2020年第2期140-145,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51807113)
山东省自然科学基金资助(ZR2016EEQ20)
南方电网公司科技项目(090000KK52180084)
关键词
埋地管道
接地网
结构优化
雷击过电压
管道防护
buried pipeline
grounding grid
structural optimization
lightning overvoltage
pipeline protection
