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There will be more and more AC transmission lines near oil/gas pipelines in the future.So in order to determine the safe distance between them,simple and effective methods are required for engineers to efficiently evaluate the electromagnetic effect on oil/gas pipelines due to faults of AC transmission lines.In this paper,an easily handled fitting formula is obtained based on multiple calculation results,which is the maximum voltage on the pipeline anticorrosive coating produced by 1 000 kV AC transmission line under single phase ground fault.Although the calculation results obtained from the fitting formula differ from those gained by precise calculation with softwares,the verification of the formula shows that it is applicable for engineering calculation.This research could be applied to evaluate the electromagnetic effect of 1 000 kV AC transmission line under single-phase ground fault on nearby pipelines,as well as to determine the safe distance or the maximum parallel length.
There will be more and more AC transmission lines near oil / gas pipelines in the future.So in order to determine the safe distance between them, simple and effective methods are required for engineers to efficiently evaluate the electromagnetic effect on oil / gas pipelines due to faults of AC transmission lines. This paper, an easily handled fitting formula is obtained based on multiple calculation results, which is the maximum voltage on the pipeline anticorrosive coating produced by 1 000 kV AC transmission line under single phase ground fault. Although the calculation results obtained from the fitting formula differ from those gained by precise calculation with softwares, the verification of the formula shows that it is applicable for engineering calculation. This research could be applied to evaluate the electromagnetic effect of 1 kV kV transmission line under single- phase ground fault on nearby pipelines, as well as to determine the safe distance or the maximum parallel length.