高压直流输电系统接地极对西气东输管道的影响

发布时间：2018-04-08 16:34

本文选题：高压直流输电系统　切入点：杂散电流　出处：《腐蚀与防护》2017年08期

【摘要】：测试了翁源高压直流输电接地极采用单极大地回路方式运行时,对西气东输二线天然气管道的影响,分析了高压直流输电系统中入地电流与管道干扰电位的关系。结果表明:在翁源接地极入地电流为1 200A时,管道的干扰电位能达到100V,靠近接地极段管道的电位干扰程度大于远离接地极段管道的,靠近和远离接地极段管道的电位偏移方向相反;站场、阀室接地网与管道直接跨接作为缓解措施,能有效降低跨接位置的管道电位偏移量,降低跨接处的管道风险,但会增大管道中的杂散电流,造成其他管道位置干扰的增加,提高了其他管道位置的风险。因此,采用接地网作为高压直流输电系统接地极干扰的缓解措施,需要进行合理的选点和有效的测试与优化。
[Abstract]:The influence of the ground pole of Wengyuan HVDC transmission line on the natural gas pipeline from west to east is tested, and the relationship between the earth current and the interference potential of the pipeline is analyzed.The results show that when the ground current of Wengyuan earth pole is 1 200A, the interference potential of the pipeline can reach 100 V, and the interference degree of the pipeline near the earth-pole section is greater than that of the pipe away from the earth-pole section.The direction of potential deviation of pipeline near and away from the earth pole is opposite, the station, valve chamber grounding network and pipeline directly straddle are used as mitigation measures, which can effectively reduce the pipeline potential offset and reduce the pipeline risk at the cross junction.However, the stray current in the pipeline will be increased, resulting in the increase of other pipeline location interference, which increases the risk of other pipeline positions.Therefore, using grounding grid as the mitigation measure of ground pole interference in HVDC transmission system requires reasonable selection of points and effective test and optimization.
【作者单位】：中石油东部管道有限公司;北京安科管道工程科技有限公司;北京科技大学;
【分类号】：TE973;TM721.1

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