交流电气化铁路对某输气管道的交流干扰及防护措施

摘要

交流电气化铁路对临近路由的埋地钢制管道会产生交流杂散电流干扰，影响管道阴极保护系统的运行，并对管道设备和操作人员的人身安全造成威胁。本文以某条与交流电气化铁路并行达40km的天然气管道为例，阐述了交流电气化铁路对天然气管道的交流干扰的影响、判别、原理和危害，并对被干扰管道采取了接地排流防护措施，有效的减弱了交流干扰，并使管道的阴极保护系统恢复正常，确保了管道的安全运行。%AC electric railway can cause stray current interference on buried steel pipeline nearby, which will affect cathodic protection system operation, and threaten the safety of the pipeline equipment and operator. This paper take a natural gas pipeline as an example which is parallel to AC electriifed railway about 40km. The influence, discrimination, principle and AC interference harm of the AC electriifed railway on natural gas pipeline are expounded. Grounding drainage measure is adopted on pipeline which reduces the AC interference effectively, recovers Cathodic protection system and ensures the pipeline safe operation.