摘要
埋地管道受地铁杂散电流干扰影响而在电流流出管段存在腐蚀风险,为有效缓解此类干扰,构建了具有多个牵引区间、排流网、地铁接地系统的地铁系统以及与其交叉的埋地管道及其阴极保护系统模型,选取了典型的以轨道泄漏杂散电流干扰为主和以局部集中接地泄漏杂散电流干扰为主的干扰情形主要缓解对象,分别设计了埋地管道侧、管轨连接方式以及地铁系统侧常见缓解方法的细化方案,基于数值模拟方法采用专业软件计算获得了不同缓解方案下埋地管道电位分布变化、地铁系统泄漏杂散电流分布等.基于此,分析总结了不同缓解方案的缓解效果.结果表明:设计的缓解方案均可有效缓解轨道泄漏杂散电流造成的干扰,而难以有效缓解局部集中接地泄漏杂散电流造成的干扰,应配合采取有效措施严格限制此类干扰累计出现时间,以满足埋地管道防护要求.
Corrosion risk where stray current leaks exists in buried pipeline interfered by metro stray current. In order to effectively mitigate such interference, a numerical simulation model including an entire metro system with multiple traction sections, drainage network, and grounding systems in stations, the buried pipeline its cathodic protection system is constructed in this paper. Typical stray current interference case dominated by track leakage, and case mainly caused by local stray current leakage from grounding system are selected to be mitigated. Detailed schemes are designed based on common mitigation methods on buried pipeline, drainage to rails, and metro system respectively. Based on the numerical simulation method and professional software, the potential distribution of buried pipeline and stray current density distribution on rails, and so on are obtained. Based on the data, the mitigation effects of different mitigation schemes are analyzed and summarized. The results show that the designed mitigation scheme can effectively mitigate the interference caused by leakage stray current from rail. However, it is difficult to effectively mitigated the interference caused by local stray current leakage from grounding system. Effective measures should be taken to strictly limit the cumulative occurrence time of such interference to meet the protection requirements of buried pipelines.
作者
董亮
石超杰
陈树新
刘佳
姚知林
DONG Liang;SHI Chaojie;CHEN Shuxin;LIU Jia;YAO Zhilin(School of Petroleum Engineering,Changzhou University,Jiangsu Changzhou 213164,China;Baoding Antai Appraisal Company Limited,Baoding Hebei071051,China;China Petroleum Pipeline Engineering Corporation,LangfangHebei 065000,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2020年第3期19-29,共11页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金(51401017)
2018年江苏省油气储运技术重点实验室开放课题
2019年江苏省研究生科研与创新计划(SJCX19_0669)。
关键词
地铁杂散电流
缓解效果
数值模拟
埋地管道
干扰
metro stray current
mitigation effects
numerical simulation
buried pipeline
interference
