Potential Influence of Ground Return Current from HVDC Grounding Electrode on Buried Pipeline

被引：0
|
作者：
Meng X. [1 ]
Zhang B. [2 ]
Liao Y. [1 ]
Li R. [1 ]
Gong B. [1 ]
Cao F. [2 ]
机构：
[1] Electric Power Research Institute, CSG, Guangzhou, 510080, Guangdong Province
[2] Department of Electrical Engineering, Tsinghua University, Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Circuit model; DC current; Grounding; HVDC transmission; Moment methods; Pipeline protection;
D O I：
10.13334/j.0258-8013.pcsee.182218
中图分类号：
学科分类号：
摘要：
With the rapid growth of energy demand, the construction of HVDC transmission projects and gas transmission pipelines is also increasing rapidly. In developed area, there is not only dense electric power grid, but also dense gas pipelines. In this situation, the DC current injected into the earth through the HVDC grounding electrodes would aggravate the corrosion of the pipelines and even destroy the protection devices of the pipelines. The influence of the ground return current from HVDC grounding electrode on buried metal pipeline is not studied in depth. The research on the horizontal partition soil model and the polarization effect of the buried pipeline has never been carried out effectively. The influence of ground return current on buried metal pipeline could not be analyzed systematically and comprehensively. In the project, the calculation method of the horizontal partition soil model was presented. On this basis, the simulation model of the influence of ground return current on buried metal pipeline considered the main cathodic protection methods was built in multi-region layered soil structure. The results from actual pipeline measurement test and small-scale model test were used to optimize the simulation mode. Then, the simulation model was used to study the influence of the ground return current on the buried pipelines. The comprehensive protection measures were presented, which provided theoretical basis for the design and implementation of the pipeline. © 2019 Chin. Soc. for Elec. Eng.
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页码：6113 / 6121
页数：8
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