An Example of AC Interference Prediction and Protection Design for a High-speed Railway to a Buried Pipeline
The high-speed railway adopts AC power supply,and its power supply system will cause AC interference to the nearby buried pipelines and accelerate pipeline corrosion during operation,so it is necessary to mitigate the pipeline affected by AC interference.In this paper,the numerical simulation method is used to predict the AC interference of a pipeline crossing and parallel with high-speed rail,and the influence of locomotive position on the interference is studied,and the mitigation scheme is designed,forming a set of AC interference mitigation flow of high-speed rail.The research results show that the AC current density of the pipeline exceeds the interference evaluation index when the locomotive is located at the intersection of the pipeline and the high-speed railway.The mitigation scheme is designed as a solid state de-coupler and grounding method.The position and quantity of zinc strip laying are calculated for many times.After applying the mitigation scheme,the pipeline interference reaches the standard,and the mitigation effect is verified to be effective.
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