高压入地电流对埋地管道电位的影响

Influence of the High Voltage Ground Current on Buried Pipeline’s Potential

当高压直流输电系统处于单极运行方式时,会有很大的入地电流流入大地,对埋地金属管道带来负面影响,能够造成或者加速金属管道的腐蚀。论文研究了不同影响因素下,高压直流入地电流对埋地金属管道的干扰规律。结果表明土壤电阻率越大、被干扰管道到接地极的距离越大、入地电流越小、防腐层电阻率越大,高压直流输电对埋地金属管道的干扰越小。论文内容能够为新建输电线路和管道的选址以及布局提供依据。

When the high voltage direct current system runs in the unipolarway, high current will flow into the ground, which has a negative influence on buried pipelines and can cause or accelerate corrosion of metal pipelines. This paper studies the influence of the ground current to buried metal pipelines under different factors. The results show that the greater soil resistivity, the greater distance from the interfering pipe to the grounding electrode, the smaller ground current, the greater resistivity of protecting coating, the influence is smaller. The content of this paper can provide the basis for the location and layout of newly built transmission lines and pipelines.