城市轨道对油气管道直流干扰站控防护技术
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摘要
相国寺储气库工程铜相线管道遭受了设计阶段不可预见、只能在管道投运后通过实测才能获知干扰程度和范围的地铁杂散电流直流干扰,导致铜相线管-地电位波动剧烈,无法给管道提供正常的阴极保护,造成原有阴极保护系统不能正常运行。经过现场测试和资料分析,对城市轨道干扰特征和规律以及各种排流方式对铜相线的适用性进行研究,结合工程实际情况,提出在干扰环境下阴极保护站正常投运的防护方案。正常投运后采用数据记录仪UDL 2长时间采集管线电位数据,开展现场实测验证,采用澳大利亚标准AS 2832. 1提出的动态电位评价方法来评价排流防护后的效果,根据评价结果可知干扰抑制效果明显,铜相线阴极保护系统能正常运行。
The Tongxiang pipeline of the Xiangguosi gas storage project suffered DC interference of the subway stray current which was unpredictable at the design stage,and the interference extent and range could be known through actual measurement only after the pipeline was put into operation,resulting the Tongxiang pipeline pipe-to-soil potential fluctuated intensely. Normal cathodic protection could not be provided for pipeline,and the original cathodic protection system failed to operate properly. After on-site testing and data analysis,through the study of the characteristics and patterns of urban track interference and the applicability of various drainage methods to Tongxiang pipeline,combined with the actual situation of the project,the methods for protection of cathodic protection stations under DC interference was proposed for normal operation. After commissioning,the data recorder UDL2 was used to gather pipeline potential data for a long period of time,and field test verification was carried out as well,with the dynamic potential evaluation method proposed by Australian Standard AS 2832.1 to evaluate the effect of drainage protection.According to the evaluation results,the interference suppression effect is obvious,and the cathodic protection system of Tongxiang pipeline can operate normally.
The Tongxiang pipeline of the Xiangguosi gas storage project suffered DC interference of the subway stray current which was unpredictable at the design stage,and the interference extent and range could be known through actual measurement only after the pipeline was put into operation,resulting the Tongxiang pipeline pipe-to-soil potential fluctuated intensely. Normal cathodic protection could not be provided for pipeline,and the original cathodic protection system failed to operate properly. After on-site testing and data analysis,through the study of the characteristics and patterns of urban track interference and the applicability of various drainage methods to Tongxiang pipeline,combined with the actual situation of the project,the methods for protection of cathodic protection stations under DC interference was proposed for normal operation. After commissioning,the data recorder UDL2 was used to gather pipeline potential data for a long period of time,and field test verification was carried out as well,with the dynamic potential evaluation method proposed by Australian Standard AS 2832.1 to evaluate the effect of drainage protection.According to the evaluation results,the interference suppression effect is obvious,and the cathodic protection system of Tongxiang pipeline can operate normally.
引文
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[17]闫明珍,龚亮,李秋萍,等.忠县—武汉输气管道遇到的交直流干扰及防护措施[J].腐蚀与防护,2008,29(2):95-97.Yan Mingzhen,Gong Liang,Li Qiuping,et al. Ac and Dc Influence on the Pipeline from Zhongxian to Wuhan and Disposal Measures[J]. Corrosion&Protection,2008,29(2):95-97.
[18]王若丹.直流杂散电流对某埋地管道的影响与治理[J].科技创新与应用,2015,(15):82.Wang Ruodan. Influence of DC Stray Current on a Buried Pipeline and Its Treatment[J]. Technological Innovation and Application,2015,(15):82.
[19]李兆玲.高压直流接地极对埋地管道的干扰与防护[J].管道技术与设备,2017,(3):39-42.Li Zhaoling. Interference and Protection on Buried Pipeline of High Voltage Direct Current Grounding Electrode[J].Pipeline Technique and Equipment,2017,(3):39-42.
[20] Standards Australia Limited. Cathodic Protection of MetalsPipes and Cables:AS 2832. 1[S]. Sydney:SAI Global Limited,2004.
[2]夏慧芳,刘根胜.地铁直流杂散电流干扰埋地金属管道的防护与研究[J].石油库与加油站,2016,25(1):9-11.Xia Huifang,Liu Gensheng. Research on Interference of Metro DC Stray Current on Oil Products Pipeline and Prevention[J].Oil Depot and Gas Station,2016,25(1):9-11.
[3]金醒群.地铁杂散电流对埋地钢质燃气管道的腐蚀[J].煤气与热力,2012,32(3):31-34.Jin Xingqun. Corrosion of Subway Stray Current on Buried Steel Gas Pipeline[J]. Gas&heat,2012,32(3):31-34.
[4]柯甜甜,方江敏,钱瑶虹,等.地铁杂散电流对埋地金属管道阴极保护的影响[J].城市轨道交通研究,2017,20(3):90-93.Ke Tiantian,Fang Jiangmin,Qian Yaohong,et al. Effect of Metro Stray Current on Cathode Protection for Buried Metal Pipelines[J]. Urban Mass Transit,2017,20(3):90-93.
[5]徐金平.城市轨道交通中埋地管道杂散电流分析与防护[J].城市轨道交通研究,2017,20(7):60-64.Xu Jinping. Analysis of Urban Rail Transit Stray Current in Buried Pipeline and Protective Measures[J]. Urban Mass Transi,2017,20(7):60-64.
[6]赵英新,单鲁文.埋地燃气管道地铁杂散电流腐蚀的防护[J].煤气与热力,2014,34(1):5-8.Zhao Yingxin,Shan Luwen. Protection of Buried Gas Pipeline from Metro Stray Current Corrosion[J]. Gas&heat,2014,34(1):5-8.
[7]董亮,姜子涛,杜艳霞,等.地铁杂散电流对管道牺牲阳极的影响及防护[J].石油学报,2016,37(1):117-124.Dong Liang,Jiang Zitao,Du Yanxia,et al. Influence and Protection of Metro Stray Current on Pipeline Sacrificial Anode[J]. Acta Petrolei Sinica,2016,37(1):117-124.
[8]张胜利,程明,张平.相国寺地下储气库地面管网直流排流设计[J].天然气与石油,2012,30(6):60-62.Zhang Shengli, Cheng Ming, Zhang Ping. DC Discharge Design of Surface Pipeline Network in Xiangguo Temple Underground Gas Storage[J]. Natural Gas and Oil,2012,30(6):60-62.
[9]陈飞,周吉祥,牟南翔.埋地管道直流杂散电流排除实践[J].腐蚀与防护,2013,34(2):171-173.Chen Fei, Zhou Jixiang, Mou Nanxiang. Detection and Prevention of DC Stray Current in Buried Gas Pipeline[J].Corrosion and Protection,2013,34(2):171-173.
[10]陈明.轨道交通杂散电流对埋地燃气管道应用的影响研究[J].中国高新技术企业,2016,(32):95-96.Chen Ming. Study on the Influence of Stochastic Current in Rail Traffic on the Application of Buried Gas Pipeline[J].China High-Tech Enterprise,2016,(32):95-96.
[11]张玉星,杜艳霞,路民旭.动态直流杂散电流干扰下埋地管道的腐蚀行为[J].腐蚀与防护,2013,34(9):771-774.Zhang Yuxing,Du Yanxia,Lu Minxu. Corrosion Behavior of Buried Pipeline Under Dynamic DC Stray Current Interference[J]. Corrosion&Protection,2013,34(9):771-774.
[12]刘海禄,张国虎,马含悦,等.天然气处理厂阴极保护投运问题分析[J].天然气与石油,2014,32(3):53-55.Liu Hailu,Zhang Guohu,Ma Hanyue,et al. Analysis on Problems Occurring During Cathodic Protection System Commissioning in Natural Gas Treatment Plant[J]. Natural Gas and Oil,2014,32(3):53-55.
[13]程明,张平.鱼龙岭接地极入地电流对西气东输二线埋地钢质管道的影响分析[J].天然气与石油,2010,28(5):22-26.Cheng Ming,Zhang Ping. Effect of Yulongling Grounding Current on Buried Steel Pipeline of West-East Gas Pipeline 2[J]. Natural Gas and Oil,2010,28(5):22-26.
[14]程明,唐强,魏德军,等.高压直流接地极干扰区埋地钢质油气管道的综合防护[J].天然气工业,2015,35(9):105-111.Cheng Ming,Tang Qiang,Wei Dejun,et al. Comprehensive Protection of Buried Steel Pipelines at HVDC Earthed Electrode Interference Area[J]. Natural Gas Industry,2015,35(9):105-111.
[15]韩非.馈电试验在地铁杂散电流干扰排流中的应用[J].腐蚀与防护,2015,36(11):1101-1103.Han Fei. Application of Current Requirement Test to Mitigation of DC Transit Stray Current Interference[J].Corrosion&Protection,2015,36(11):1101-1103.
[16]孙银娟,成杰,王勃,等.天然气管道杂散电流干扰监测及防护措施[J].油气田地面工程,2015,34(9):76-78.Sun Yinjuan,Cheng Jie,Wang Bo,et al. Stray Current Interference Monitoring and Protective Measures on Natural Gas Pipeline[J]. Oil-Gas Field Surface Engineering,2015,34(9):76-78.
[17]闫明珍,龚亮,李秋萍,等.忠县—武汉输气管道遇到的交直流干扰及防护措施[J].腐蚀与防护,2008,29(2):95-97.Yan Mingzhen,Gong Liang,Li Qiuping,et al. Ac and Dc Influence on the Pipeline from Zhongxian to Wuhan and Disposal Measures[J]. Corrosion&Protection,2008,29(2):95-97.
[18]王若丹.直流杂散电流对某埋地管道的影响与治理[J].科技创新与应用,2015,(15):82.Wang Ruodan. Influence of DC Stray Current on a Buried Pipeline and Its Treatment[J]. Technological Innovation and Application,2015,(15):82.
[19]李兆玲.高压直流接地极对埋地管道的干扰与防护[J].管道技术与设备,2017,(3):39-42.Li Zhaoling. Interference and Protection on Buried Pipeline of High Voltage Direct Current Grounding Electrode[J].Pipeline Technique and Equipment,2017,(3):39-42.
[20] Standards Australia Limited. Cathodic Protection of MetalsPipes and Cables:AS 2832. 1[S]. Sydney:SAI Global Limited,2004.