高压输电线路对埋地输油管道中杂散电流影响规律

油田埋地金属管道周围存在着大量的高压输电线路,这些设施在运行过程中会向大地释放大量的杂散电流,造成油气管道的腐蚀泄露。本文进行了高压输电线路周围埋地金属管道杂散电流的现场测试,结果表明:长输石油管道受杂散电流影响严重。尤其当高压输电线路与埋地输油管道近距离平行时,埋地输油管道中杂散电流更严重;油气集输管道受杂散电流影响也十分严重,管地电位波动值和管地电位最大正向偏移值都随着与高压输电线路距离的增加而减小;经排流保护措施后,管道的管地电位波动值和最大正向偏移值都明显减小,管道受杂散电流影响明显减弱,并达到了排流保护的标准。

Influence of Stray Current in the Oil Pipeline Under High-Voltage Line

There were amounts of high-voltage lines around buried pipelines.Much stray currents were released to the ground during these facilities operation process,and caused the leakage of pipeline in oil field.The in-situ test of stray current around buried pipeline was performed.The results showed that the stray current had serious influence to long-distance pipeline.Especially,the effect was more serious when the pipelines were paralleled or cross to the high-voltage lines.The oil-gas gathering and transferring ...