输电线路短路电流对埋地管道电位抬升及抑制方法研究  

Research of the short-circuit current of transmission line on potential rise of buried pipeline and its suppression method

作　　者：段绍辉 宗伟 周灵杰 阮江军[2] 黄道春[2] 陈辉荣 DUAN Shaohui;ZONG Wei;ZHOU Lingjie;RUAN Jiangjun;HUANG Daochun;CHEN Huirong(Shenzhen Power Supply Co.,Ltd.,Shenzhen 518010,Guangdong,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]深圳供电局有限公司,广东深圳518010 [2]武汉大学电气与自动化学院,武汉430072

出　　处：《电测与仪表》2024年第3期89-94,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51977152);中国南方电网有限责任公司科技项目(SZKJXM20170894)。

摘　　要：针对城市中输电线路与埋地油气金属管道临近问题,通过建立架空导/地线-杆塔-接地网-埋地管道一体化电磁场计算模型,综合考虑导线和避雷线对金属管道的感性耦合影响以及杆塔入地电流对管道的阻性耦合影响。基于此模型研究土壤电阻率、临近距离、管道参数、交叉跨越角度以及不同供流方式对金属管道电位、防腐层耐受电压的影响规律,并开展管道电位抬升的抑制方法研究,可以为输电线路发生接地短路故障时临近燃油(气)管道安全防护提供指导。Aiming at the problem of the proximity of transmission lines and buried pipelines in cities,through the establishment of a line-tower-grounding-buried pipeline integrated model,comprehensive consideration is given to the process that the shunt of adjacent towers and lightning conductors and the fault current entering the ground via the tower grounding grid.Based on this model,the effect laws of soil resistivity,proximity distance,pipeline parameters,crossover angles,and different current supply methods on the potential of metal pipelines and corrosion resistance voltage are studied.Research on the suppression method of pipeline potential rise can also be carried out for transmission lines,which provides guidance on the safety protection of adjacent fuel(gas)pipelines when a ground short circuit fault occurs.

关 键 词：输电线路 埋地金属管道 电位抬升 抑制方法 

分 类 号：TM75[电气工程—电力系统及自动化]