摘要
在公共走廊内,高压交流输电线路和埋地油气管道的共同敷设,不可避免地会产生交流电对埋地管道的干扰问题,这不仅会影响管道的正常运行,还会导致阴保系统异常。以甬绍金衢管道为研究对象,以交流干扰电压4 V为限值,通过CDEGS软件对不同相线高度和土壤电阻率条件下的埋地管道交流干扰安全间距进行了研究。研究结果表明:安全间距与并行长度总体呈对数关系,主要分为快速增大和平稳变化2个阶段;在研究条件下,当相线对地高度大于21.44 m时,高度对埋地管道交流干扰的安全间距没有影响,土壤电阻率的影响大于输电线路对地高度,土壤电阻率越大,对埋地管道干扰电压变化程度影响越大。
In public corridors, laying HVAC transmission lines and buried pipelines together will inevitably lead to the interference of AC power to buried pipelines, which will not only affect the normal operation of pipelines but lead to the abnormality of cathodic protection system. Taking the Yongshao-Jinqu pipeline as the subject in the study and the ac interference voltage of 4 V as the limit value, this paper studies the safe AC interference spacing of buried pipelines with different phase line heights and soil resistivity by using CDEGS software. The results show that there is a logarithmic relationship between the safety distance and the parallel length, which can be divided into two stages: under the research conditions in this paper, when the ground height of the phase line is greater than 21.44 m, the height has no influence on the safe spacing of AC interference of buried pipelines. The influence of soil resistivity is greater than that of the transmission line to the ground. Meanwhile, the greater the soil resistivity is, the greater the influence of it is on the disturbance voltage variation degree of buried pipelines.
作者
阮亦根
李自力
RUAN Yigen;LI Zili(Zhejiang Petroleum Branch of Sinopec,Hangzhou 310009,China;China University of Petroleum (East China),Qingdao Shandong 266580,China)
出处
《浙江电力》
2019年第4期92-95,共4页
Zhejiang Electric Power
基金
中国石化科技开发基金项目(313006)
关键词
交流干扰
埋地管道
安全间距
土壤电阻率
AC interference
buried pipelines
safety distance
soil resistivity
