特高压交流架空线路与油气管道的防护间距

Protection Clearance Between UHV AC Overhead Line and Oil or Gas Pipelines

特高压交流架空输电线路与各种埋地金属油气管道长距离共用走廊时将带来对管道的稳态干扰。为确保特高压交流输电线路不对管道及工作人员产生安全影响,首先讨论了高压输电线路对管道及工作人员的影响限值,然后通过多导体传输线理论推导了两者间稳态干扰的简化计算方法,最后依据推荐的限值开展了两者间防护间距的计算研究。研究表明,给出的两者间稳态干扰的简化计算方法操作简便计算速度快,得到的最小防护间距可供特高压输电线路与埋地金属油气管道共用走廊时设计参考之用。

With the rapid construction of UHV AC transmission lines on the countrywide scale, it is unavoidable that the UHV AC overhead lines share the right -of-way with various buried metallic oil or gas pipelines in the region without sufficient soil sources, like East China. Steady interference on buried metallic pipeline will be generated by UHV AC overhead line under the condition that they are in the same long right-of-way. For the security of pipeline and pipeline workers, firstly, we discussed the influence limitation. Secondly, based on the theory of multi-conductor transmission lines （MTLsl, we deduced a set of simplified calcuiation method for above steady interference. Finally, we calculated the protective distance between the UHV AC overhead line and pipeline according to the limitation recommended above. The simplified calculation method, with the superiority of operation convenience and fast speed, and the minimum protection clearance can be used in design of right-of-way shared by UHV AC overhead line and pipeline.