胶东接地极对某管道干扰检测及模拟分析研究

Detection and Simulation Analysis of Jiaodong HVDC Grounding Electrodes on Direct Current of a Pipeline

文章介绍了高压直流输电系统接地极对管道的电磁干扰影响机理,针对±660KV银东直流输电线胶东接地极对临近LNG管道产生的直流干扰影响,通过开展现场检测,监测管道电位情况,评估接地极对管道直流干扰影响的范围和程度,同时利用CDEGS软件模拟分析直流输电线路在单极大地回路模式下胶东接地极对管道产生的直流杂散电流干扰影响范围和程度,并与现场检测结果进行对比分析。根据评估分析结果提出接地极对管道干扰的缓解治理措施和腐蚀监测方案。

The paper introduced the mechanism of the electromagnet interference of HVDC transmission system earth-electrode on the pipeline.Directed at the DC disturbances of±660KV Yinchuan-Jiaodong HVDC earth-electrode on the nearby LNG pipeline,through field test and monitoring of pipeline electric potential,the range and extent of such disturbances were evaluated.Meanwhile,the range and extent of direct stray current disturbances from the DC transmission line on the pipeline under monopolar earth-return mode were analyzed using CDEGS,results of which were then compared with field test results.Based on results of evaluation and analysis,mitigation and control measures of the pipeline interference from earth-electrode and a corrosion monitoring program were put forward.