城市轨道对油气管道直流干扰站控防护技术
Study on Direct Current Interference Protection Technology of Urban Track to Oil and Gas Pipeline
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- 引用格式:
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张胜利,牙亚萌,张国虎,唐强,陆剑锋,许捷.城市轨道对油气管道直流干扰站控防护技术[J].天然气与石油,2018,36(5):0.doi:
Zhang Shengli, Ya Yameng, Tang Qiang, Zhang Guohu, Lu Jianfeng, Xu Jie.Study on Direct Current Interference Protection Technology of Urban Track to Oil and Gas Pipeline[J].Natural Gas and Oil,2018,36(5):0.doi:
- DOI:
- 作者:
- 张胜利1 牙亚萌1 张国虎1 唐 强1 陆剑锋2 许 捷3
Zhang Shengli1, Ya Yameng1, Tang Qiang1, Zhang Guohu1, Lu Jianfeng2, Xu Jie3
- 作者单位:
- 1. 中国石油工程建设有限公司西南分公司,2. 四川北尚新材料科技有限公司,3. 中国石油天然气股份有限公司西南油气田分公司储气库管理处
1. China Petroleum Engineering & Construction Corp. Southwest Company, Chengdu, Sichuan, 610041, China 2. Sichuan Beishang New Material Technology Co., Ltd., Chengdu, Sichuan, 610101, China 3. PetroChina Southwest Oil & Gasfield Company Gas Storage Management Office
- 关键词:
- 城市轨道;地铁;杂散电流;直流干扰;阴极保护;排流;管道
Urban track; Subway; Stray current; DC interference; Cathodic protection; Drainage; Pipeline
- 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.
