Regularity and Distinguishing Methods of the Interference on Oil and Gas Pipeline Caused by Urban Infrastructure

Based on the fact that some urban infrastructures such as multiple high-voltage AC/DC transmission lines, urban subway and high-speed railway, often cioss/span over a pipeline in the east of China, various parameters along the pipeline (such as on-off potential, AC interference voltage, current density, etc.) were monitored on-site and analyzed by theory. Through the comparison of interference sources, the types and laws of the disturbed sections along the pipeline were obtained. Based on these, the methods to identify the interference of various types of infrastructure were summarized, which may provide reference for the identification of other similar disturbances.