摘要
通过数值模拟技术,研究了海缆和陆上换流站的杂散电流对海底管线的干扰程度及影响因素,并根据管线运行状况及干扰程度给出了优化方案。结果表明:海缆稳态运行下电流不平衡度为1.39%、2%和4%时,海底与陆地管线的交流干扰电压和电流密度均满足评价指标要求,无需缓解设计;海缆故障运行时,在C线、B线及A线的登陆段分别敷设100m、100m及150m的锌带,可以使管道接触电压低于779V人身安全电压限值的要求。
Through numerical simulation technology,the interference degree and influencing factors of AC stray current of submarine cables and onshore converter stations on submarine pipelines were studied.And according to the pipeline operation condition and interference degree,the optimized solutions were proposed.The results show that current imbalance degrees were 1.39%,2%and 4%under steady-state operating condition of submarine cable,the AC interference voltage and current density of the submarine and land pipelines met the evaluation index requirements,and there was no need to mitigation design;100 m,100 mand 150 mzinc tapes were laid on the landing sections of line C,line B and line A respectively,which made the contact voltage of pipeline lower than the personal safety voltage limit of 779 V.
作者
李平
LI Ping(Sinopec Pipeline Storage and Transportation Co.,Ltd.,Xuzhou 221008,China)
出处
《腐蚀与防护》
CAS
北大核心
2021年第3期46-56,72,共12页
Corrosion & Protection
关键词
海底管线
交流干扰
腐蚀评价
数值模拟
subsea pipeline
AC interference
corrosion evaluation
numerical simulation
