摘要
由于路面上可用的输电走廊资源日趋减少,电能输送渠道逐渐向埋地电缆倾斜。埋地电缆与输油输气管道往往共用走廊,交流电磁场会在管道上产生纵向感应电压。该电压可能损坏金属管道,甚至威胁作业人员的生命安全。为了研究埋地电缆对金属管道电磁干扰的特点,本文建立了埋地电缆与管道耦合模型,讨论了不同因素对感应电压和纵向电流影响规律。仿真结果表明:埋地电缆对金属管道的电磁干扰随着并行间距的增加逐渐减小,最终趋于稳定;随着并行长度的增加,埋地电缆对金属管道的电磁干扰呈现缓慢增大,最终趋于稳定。
As the available power transmission corridor resources on the road are gradually reduced,the power transmission channel is gradually inclined to the buried cable.Buried cables often share corridors with oil and gas pipelines,and AC electromagnetic fields will generate longitudinal induced voltage on the pipelines.The voltage may damage metal piping and even threaten the safety of operators.In order to investigate the characteristics of electromagnetic interference between buried cables and metal pipelines,the coupling model of buried cables and pipelines is established,and the influence of different factors on induced voltage and longitudinal current is discussed.The simulation results show that the electromagnetic interference of buried cable to metal pipe decreases gradually with the increase of parallel spacing and finally tends to be stable.With the increase of the parallel length,the electromagnetic interference of buried cable to metal pipe shows a slow and steady trend.
作者
吕智
Lv Zhi(Sinopec Jianghan Petroleum Engineering Design Co.,Ltd.Wuhan Hubei 430000,China)
出处
《工程与试验》
2020年第1期55-56,64,共3页
Engineering and Test
关键词
埋地电缆
金属管道
电磁干扰
感应电压
buried cable
metallic conduit
electromagnetic interference
induced voltage
