摘要
基于COMSOL软件建立了±800 kV高压直流接地电流对埋地管道干扰模型,研究接地电流对埋地管道的干扰规律,详细分析了管道最小防护距离的影响因素。结果表明:管道长度、管道防腐涂层类型、土壤电导率对受到高压直流接地电流干扰的管道影响较大。管道越长,管道防腐涂层电导率越大,土壤电导率越小,管道的最小防护距离越大,其受到的干扰越大。当管道长度达到或超过600 km时,管道受到的干扰程度趋于稳定;管道常用的3PE、环氧粉末、石油沥青3种防腐涂层中,3PE防腐涂层管道最小防护距离最小,其受到的干扰程度最小;在多层土壤结构中,管道最小防护距离的影响主要由电导率最小的一层土壤决定,可将电导率最小的一层土壤的电导率视为整体土壤的电导率来考虑。
A interference model of grounded high-voltage direct current(HVDC)of±800 kV on buried pipelines was established based on COMSOL software,and the interference law of the grounded HVDC on buried pipelines was studied.The influencing factors of the minimum protection distance of pipelines were analyzed.The results indicate that pipeline length,type of pipeline anti-corrosion coating and soil conductivity have a significant impact on pipelines affected by grounded high-voltage direct current interference.The longer the pipeline,the higher the conductivity of the pipeline anti-corrosion coating,the lower the soil conductivity,and the larger the minimum protection distance of the pipeline,the greater the interference it is subjected to.When the length of the pipeline reaches or exceeds 600 km,the interference experienced by the pipeline tends to stabilize;Among the three commonly used pipeline anti-corrosion coatings 3PE,epoxy powder and petroleum asphalt,the pipeline using 3PE anti-corrosion coating has the smallest protection distance and the least interference;For multi-layer soil structure,the minimum protection distance of pipelines is mainly determined by the soil layer with the lowest conductivity,and the conductivity of the soil layer with the lowest conductivity can be regarded as the conductivity of overall soil.
作者
赵书华
卢小蝶
黎少飞
饶永超
ZHAO Shuhua;LU Xiaodie;LI Shaofei;RAO Yongchao(School of Oil and Natural Gas Engineering in School of Energy,Changzhou University,Changzhou,Jiangsu 213016,China;Key Laboratory of Jiangsu Province for Oil and Gas Storage and Transportation Technology,Changzhou University,Changzhou,Jiangsu 213016,China;Tianshui Oil and Gas Transmission Branch,PipeChina Southwest Pipeline Co.,Ltd.,Tianshui,Gansu 741002,China)
出处
《西安石油大学学报(自然科学版)》
北大核心
2025年第1期99-105,共7页
Journal of Xi’an Shiyou University(Natural Science Edition)
基金
国家自然科学基金项目(51974037)
江苏省高校省级实验室开放基金项目(CDYQCY202101)。
关键词
高压直流
油气管道
电流干扰
最小防护距离
数值模拟
HVDC
oil and gas pipeline
current interference
minimum protection distance
numerical simulation
