考虑管道阴极保护的直流接地极对管道干扰及防腐措施研究  

Study on interference of direct-current grounding electrode on pipeline considering cathodic protection of pipeline and anticorrosion measures

作　　者：陈晓 李琳[1,2] 张伯阳 CHEN Xiao;LI Lin;ZHANG Boyang(School of Electronic Engineering,Xi’an Shiyou University,Xi’an 710065,China;Key Laboratory of Oil and Gas Well Measurement and Control Technology in Shaanxi Province,Xi’an 710065,China)

机构地区：[1]西安石油大学电子工程学院,陕西西安710065 [2]陕西省油气井测控技术重点实验室,陕西西安710065

出　　处：《电镀与涂饰》2023年第22期48-56,共9页Electroplating & Finishing

基　　金：陕西省咸阳市科技局项目(2021ZDYF-GY-0023)。

摘　　要：为研究高压直流(HVDC)输电接地极在单极大地回线方式运行时其入地电流对附近油气管道的影响,考虑管道阴极保护在内,针对接地极入地电流,在不同的接地极与管道间距离、土壤电阻率、管道涂层电阻和管道外径的条件下,对管道的干扰情况进行了模拟。采用COMSOL Multiphysics软件,基于有限元法建立了HVDC接地极对管道的干扰模型,通过直流干扰实验验证了干扰模型的准确性,并仿真得出管道阴极保护电位受接地极干扰的分布规律。结果表明,管道阴极保护电位的偏移随接地极电流和土壤电阻率增大而增大,随接地极与管道间距、管道外径和管道涂层电阻增大而减小。还对管道的其他防腐措施进行了分析。研究结果可为优化管道阴极保护系统和接地极埋地提供依据与参考。To investigate the impact of incoming current from high-voltage direct current(HVDC)transmission grounding electrodes on nearby oil and gas pipelines operating in single-pole earth return mode,the pipeline interference was simulated considering cathodic protection for different conditions such as the distance between grounding electrode and pipeline,soil resistivity,pipeline coating resistance,and outer diameter of pipeline.An interference model of HVDC grounding electrode on pipeline was established by finite element method using COMSOL Multiphysics software and validated experimentally.The distribution of cathodic protection potential on pipeline caused by grounding electrode interference was derived.The results showed that the offset of cathodic protection potential on pipeline was increased with the increasing of grounding electrode current and soil resistivity,but decreased with the increasing of the distance between grounding electrode and pipeline,

关 键 词：油气管道 高压直流输电 接地极 阴极保护 干扰 腐蚀 

分 类 号：TE988[石油与天然气工程—石油机械设备]