地铁附近燃气管道杂散电流干扰分析及评价  

Analysis and Evaluation of Stray Current Interference on Gas Pipelines near Subway

作　　者：文陈鼎 黎金华 秦朝葵[2] WEN Chending;LI Jinhua;QIN Chaokui(Foshan Natural Gas Pipe Network Co.,Ltd.;School of Mechanical Engineering,Tongji University)

机构地区：[1]广东佛山市天然气高压管网有限公司 [2]同济大学机械与能源工程学院

出　　处：《上海煤气》2024年第3期1-4,11,共5页Shanghai Gas

摘　　要：以广东佛山桂城区域交叉穿越2条地铁线路的高压燃气管道监测为例,研究地铁与燃气钢质管道交叉情形下,杂散电流对管道的干扰规律及杂散电流流动路径。通过无线远传数据记录仪连续监测通电电位、断电电位和牺牲阳极电流数据,结合法拉第定律,得出在地铁动态杂散电流干扰下,该管道3个测点牺牲阳极电流平均消耗速率分别为4.75 kg/a、2.25 kg/a和1.93 kg/a。同时进一步分析杂散电流在管道中的暂态和瞬时流动,从而确定杂散电流的主要干扰源,为下一步缓解管道干扰影响的防护措施提供依据。Based on monitoring examples of high pressure gas pipelines crossing two subway lines in Guicheng area,Foshan,Guangdong.The interference rule on pipelines and the flow path of stray current under the crossing condition of subway and steel gas pipelines are studied.The datum of on-going potential,off-going potential and sacrificial anodes current are continuously monitored by wireless remote data recorder,and the average consumption rate of sacrificial anodes current of three measuring points in the pipeline is 4.75 kg/a,2.25 kg/a and 1.93 kg/a under the dynamic interference of stray current by Faraday's laws.At the same time,the transient and instantaneous flow of stray current in the pipeline is further analyzed,so as to determine the main interference source of stray current and provide the basis for protection measures to alleviate the interference on pipelines in the next step.

关 键 词：地铁杂散电流 埋地燃气管道 动态干扰 牺牲阳极 

分 类 号：U231[交通运输工程—道路与铁道工程] TU996.9[建筑科学—供热、供燃气、通风及空调工程]