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高压直流输电接地极对管道阴极保护系统的干扰研究

Study on the Interference of the HVDC Transmission Grounding Electrode to the Pipeline Cathodic Protection System.

作者信息

Chen Xiao, Li Lin

机构信息

Key Laboratory of Shaanxi Province for Gas-Oil Logging Technology, Xi'an Shiyou University, Xi'an, Shaanxi 710065, China.

出版信息

ACS Omega. 2023 Jun 5;8(24):22088-22098. doi: 10.1021/acsomega.3c02187. eCollection 2023 Jun 20.

DOI:10.1021/acsomega.3c02187
PMID:37360437
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10286306/
Abstract

Oil and gas are still largely transported by long-distance pipelines. In this study, we aimed to examine the impact of the high-voltage DC transmission grounding electrode on long-distance pipelines' cathodic protection system nearby. The writer built the interference model of the DC transmission grounding electrode on the pipeline using COMSOL Multiphysics based on the parameters of the actual project and considering the cathodic protection system within and then tested the model using experimental data. By simulating and calculating the model under different conditions of grounding electrode inlet current, grounding electrode-pipe distance, soil conductivity, and pipeline coating surface resistance, we obtained the current density distribution in the pipeline and the cathodic protection potential distribution law. The outcome presents a visual representation of the corrosion occurring in adjacent pipes as a result of DC grounding electrodes operating in monopole mode.

摘要

石油和天然气仍主要通过长距离管道运输。在本研究中，我们旨在研究高压直流输电接地极对附近长距离管道阴极保护系统的影响。作者基于实际工程参数，利用COMSOL Multiphysics建立了直流输电接地极在管道上的干扰模型，并考虑了内部的阴极保护系统，然后用实验数据对模型进行了测试。通过在接地极入地电流、接地极与管道距离、土壤电导率和管道涂层表面电阻等不同条件下对模型进行模拟和计算，我们得到了管道内的电流密度分布和阴极保护电位分布规律。结果直观地呈现了直流接地极以单极模式运行时相邻管道发生腐蚀的情况。

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