埋地金属管与架空电力线路并行时管道饱和平行长度及最大金属电位计算  

Calculation of Critical Length and Maximum Metal Voltage for Underground Metal Pipeline in Parallel with the Overhead Power Transmission Line

作　　者：齐磊[1] 原辉[1] 崔翔[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《高电压技术》2011年第10期2601-2606,共6页High Voltage Engineering

基　　金：中央高校基本科研业务费专项资金(09TG01)~~

摘　　要：电力行业和石油天然气行业对传输路径的择优原则极为相近,输电线路与输油输气管道平行接近或交叉跨越的情况时有发生,对输油输气管道的电磁影响问题日益突出。为此,将变量置换和自适应Gauss-Lobatto数值积分方法相结合,计算均匀土壤情况下的大地返回阻抗,该方法具有较快的计算收敛速度。通过该方法与CDEGS软件和近似公式的计算结果进行比较,验证了该计算方法的正确性。结合现有文献的研究成果,该计算方法可推广应用于大地水平分层情况。通过严格理论推导,获得了管道两端接不同负载时管道饱和平行长度以及相应的最大管道金属电位的计算公式,同时还给出了相应的约束条件以及出现最大管道金属电位的管道位置。研究成果可为输电线路与管道工程建设中的走廊选择提供技术依据。By combining the variable substitution with the method of adaptive Gauss-Lobatto Quadrature, we calculated the earth return impedances for homogeneous earth case. Then we tested the method by comparing the results with CDEGS and approximated formula. Moreover, we investigated the formula of critical length and maximum metal potential of the pipeline from the strict derivation when the pipeline was connected with different loads at both ends. The results reveal that the method converges quickly, and the method can be applied to multilayer soils cases. Meanwhile, the corresponding constraints and position of maximum metal potential of the pipeline can be calculated. The research can provide a technical support for the selection of transmission line and pipeline engineering.

关 键 词：交流输电线路 埋地金属管道 输油输气管道 感性耦合 管道饱和平行长度 传输线模型 

分 类 号：TM751[电气工程—电力系统及自动化]