Study On Stray Current Affection From AC Electrified Railway To Buried Pipelines

With the rapid development of China's economy, we need to construct more and more infrastructures of transportation and energy domain. In recent years, with raising the railway electrification rate and opening many special railway lines of passenger transportation, China's total length of electrified railways is close to 30,000 kilometers, which have been situated second in the world. Meanwhile, the length of oil and gas pipelines also grows day by day for satisfying the rising energy demand. As a result of geographical location, lots of oil and gas pipelines and electrified railways are parallel or crossed, which makes oil and gas pipelines inevitably be affected and even eroded by stray current. If we don't handle properly, this will have serious harm. In order to ensure pipelines safely transport oil and gas, it is important to study the rail-to-pipeline affecting rule and how to lower the rail-to-pipeline affection.This paper is based on studying the simulation principle of the rail-to-pipeline affection, establishing experimental apparatus to carry on the experiment and measure the pipeline AC influence voltage, which is combined with the actual situation at the scene. The goal is to study the rail-to-pipeline affecting rule under the different conditions. Meanwhile, it is based on the basic theory of electric field, carrying on the theory inferential reasoning and obtaining the formula of the pipe-to-ground potential. In addition, this paper determines the formulas of the pipeline and the railway alternating current parameter, with obtaining the formula of the AC traction network impedance parameter. On the basis of the analysis and comparison of the theoretical and experimental values, it amends the theoretical model for compiling the software, which is used to predict the extent of corrosion interference for how to carry on the stray current protection.