高压直流接地极单极运行对埋地管道电位的干扰与影响  

Interference and Impact of HVDC Grounding Electrode Monopolar Operation on Buried Pipeline Potential

作　　者：胡上茂 刘刚 廖民传 刘青松[2] 贾磊 吴泳聪 屈路 张义 蔡汉生 HU Shangmao;LIU Gang;LIAO Minchuan;LIU Qingsong;JIA Lei;WU Yongcong;QU Lu;ZHANG Yi;CAI Hansheng(State Key Labratory of HVDC,Electrical Power Research Institute,CSG,Guangzhou 510663,China;Maintenance&Test Center of EHV Power Transmission Company,CSG,Guangzhou 510663,China)

机构地区：[1]直流输电技术全国重点实验室(南方电网科学研究院),广州510663 [2]中国南方电网有限责任公司超高压输电公司检修试验中心,广州510663

出　　处：《南方电网技术》2023年第9期104-111,共8页Southern Power System Technology

基　　金：中国南方电网有限责任公司科技项目(CGYKLXM 20190489);国家自然科学基金资助项目(52277158)。

摘　　要：为评价接地极单极运行对埋地油气管道的电位干扰情况,采用Beasy仿真计算软件建立了考虑管道阴极保护系统和管道极化效应的电路仿真模型,通过仿真计算研究了接地极不同极性、不同入地电流和接地极与管道的距离对管道的极化电位分布影响规律。结果表明:接地极的入地电流越大,管道受干扰的极化电位越大,入地电流与极化电位满足线性关系;接地极与管道的垂直距离越短,靠近接地极端的近端管道越短,管道受干扰的极化电位越大。管道的阴极保护系统会抑制部分高压直流产生的杂散电流;对于现场实际工况,需考虑管道阴极保护系统对接地极杂散电流的影响。To evaluate the potential interference of grounding electrode in monopolar operation on buried oil and gas pipeline,a circuit simulation model considering cathodic protection system and polarization effect of the pipeline is established by using Beasy software.Through simulation calculation,the influence of different monopolar polarity,operating current of grounding electrode and distance away from the pipeline on the distribution of polarization potential of pipeline is studied.The results shows that the higher the operating current is,the greater the polarization potential shifts.The linear relationship between the operating current and polariza-tion potential is found out that the closer the grounding electrode is to the pipeline,the shorter the pipeline span under severe interfer-ence is at the near end of the grounding electrode,and meantime,the greater the polarization potential shifts.The cathodic protection system of the pipeline can suppress certain stray current generated by HVDC.For real conditions,the suppressing effect of the cathodic protection system should be considered to evaluate HVDC interference on the pipeline.

关 键 词：高压直流 接地极 单极运行 管道 阴极保护 极化电位 

分 类 号：TM862[电气工程—高电压与绝缘技术]