摘要
随着我国经济的持续增长,交流输电线路对输油输气管道的电磁影响问题日益突出。基于管道-大地回路传输线模型,获得了交流输电线路正常运行时在输油输气管道上产生的感性耦合电压的解析表达式。经过严格推导,提出了管道两端接匹配阻抗时管道饱和平行长度的概念,即随着管道平行长度的增大,管道感性耦合电压先逐渐增大,然后略有降低,并最终基本趋于稳定。通过仿真计算,拓展了线路与管道斜接近时等效接近距离现有经验公式的适用范围,计算误差可控制在5%以内。研究成果可供电力部门和石油管道部门进行管道安全评估或确定管道与线路的最小安全距离。
With the sustained growth of economy in China,electromagnetic influence on oil/gas pipeline near AC transmission line becomes increasingly prominent. Based on the transmission line model of pipeline-earth circuit,the analytic expressions of inductive coupling voltage generated by the normally operating AC transmission line were obtained for different terminal loads of the oil/gas pipeline in this paper. The conception of critical length was put forward from the strict derivation when the pipeline in parallel with the transmission line was connected with the matched loads at both ends. Namely,the inductive coupling voltage firstly increases,then slightly decreases,finally tends to some constant with the increase of parallelism length of the pipeline. For the oblique approach between the pipeline and transmission line,the existing empirical formula of the equivalent distance was extended and with the error below 5%. The proposed method can be used for the pipeline safety evaluation and the determination of minimum distance between the pipeline and the power transmission line.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第21期121-126,共6页
Proceedings of the CSEE
基金
中央高校基本科研业务费专项资金资助(09TG01)~~
关键词
特高压输电
输油输气管道
感性耦合
传输线
饱和平行长度
UHV power transmission
oil/gas pipeline
inductive coupling
transmission line
critical length of parallelism
