区域阴极保护实践与分析
Practice and Analysis on Regional Cathodic Protection
浏览(3163) 下载(4)
- 引用格式:
-
李海坤,谢涛,王颖,王文忠.区域阴极保护实践与分析[J].天然气与石油,2013,31(2):0.doi:
.Practice and Analysis on Regional Cathodic Protection[J].Natural Gas and Oil,2013,31(2):0.doi:
- DOI:
- 作者:
- 李海坤1，2 谢 涛1，2 王 颖1，2 王文忠3
- 作者单位:
- 1.中国石油天然气管道科学研究院，2.油气管道输送安全国家工程实验室，3.新地能源工程技术有限公司
- 关键词:
- 输气站场；区域阴极保护；深井阳极地床；分布式浅埋阳极地床
Oil and gas transportation station； Region； Cathodic protection； Interference
- 摘要:
- 为验证输气站场区域阴极保护方案的效果并发现问题，在某个输气站场进行了深井阳极和分布式浅埋阳极地床阴极保护系统安装试验，并进行了测试，分析了阳极地床位置、接地系统对管/地电位分布及干线管道电干扰的影响。测试结果表明，深井阳极地床倾向于把保护对象整体极化，保护区域边缘极化效果明显，区域中心则因管道及接地系统密集导致极化程度较低，宜采用分布式浅埋阳极地床局部补足。深井阳极地床应尽可能远离干线管道，并适当接近保护对象，合适的情况下可利用深井阳极地床扩散出去的部分电流保护干线管道。
In order to validate the effect of regional cathodic protection scheme for gas stations and find potential problems， installed and test is a set of deep well anode + shallow-buried ground bed cathodic protection system in a gas station， analyzed are effects of the anode ground bed position and grounding system on pipe-to-soil potential distribution and electrical interference of main pipeline and test results show that deep well anode ground bed tends to put the protected object into whole polarization， polarization effect in station edge is obvious， polarization effect in station center area is poor due to concentration of pipelines and grounding system， where shallow-buried anode should be applied for local supplement. Deep well anode shall be installed away from main pipeline as far as possible and close to the protected object properly. If appropriate， it is feasible to utilize part of current diffusing from deep well anode to protect main pipeline.
