广东地区天然气埋地管道防高压直流输电接地极干扰措施及其缓解效果

Auti-interference Measures and Their Mitigation Effect of HVDC Grounding Electrode for Natural Gas Buried Pipeline in Guangdong

广东地区天然气埋地管道因受高压直流输电(HVDC)接地极干扰,采用了铺设锌带、阀室接地、阴极保护等防干扰措施,通过管道电位和腐蚀速率分析研究了这些防干扰措施对高压直流输电干扰的缓解效果。结果表明:管道方的防干扰措施可以在一定程度上缓解管道受到的干扰,但控制干扰源与管道的间距、减少接地极放电时长、降低接地极放电频次才是效果最佳的防干扰措施。

Due to the interference of high voltage direct current(HVDC)grounding electrodes to natural gas buried pipelines,anti-interference measures were adopted,such as zinc ribbon paving,valve chamber grounding,cathodic protection and others.The mitigation effect of these measures was studied by the analysis of pipeline potentials and corrosion rates.The results show that the anti-interference measures adopted by pipeline side could alleviate the interference degree of the pipeline to a certain extent.But the best measures are controlling the distance between interference source and pipeline,reducing the discharging time and frequency of grounding electrode.