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Mitigation of induced voltages and AC corrosion effects on buried gas pipeline near to OHTL under normal and fault conditions

机译:正常和故障条件下对OHTL附近的地下燃气管道的感应电压和AC腐蚀的影响

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In this paper the induced voltages along the length of the buried gas pipeline, due to the inductive coupling and conductive coupling between this pipeline and the overhead transmission line (OHTL), are calculated under normal and fault conditions of the OHTL. Also, this paper deals with the mitigation of these induced voltages. Fault conditions of the OHTL include symmetric and un-symmetric faults. Where, ATP software is used to simulate the OHTL under all fault conditions. The obtained results from the ATP program are used to calculate the pipeline induced voltages under both normal and fault conditions. Mitigation system to minimize the impact of the OHTL on pipelines at normal and fault conditions is designed. Under normal condition, the pipeline induced voltages, after earthing system (mitigation system) was erected, are measured and compared with the calculated values. Also, pipeline coating discharging current and pipeline AC current density due to inductive coupling under normal operation and due to inductive and conductive coupling under single phase to ground fault condition of the OHTL, before and after erecting the mitigation system, are calculated and analyzed. (C) 2015 Elsevier B.V. All rights reserved.
机译:在本文中,由于该管道与架空输电线路(OHTL)之间的感应耦合和导电耦合,在地下和正常状态下计算了沿埋藏式天然气管道长度的感应电压。另外,本文还介绍了这些感应电压的缓解方法。 OHTL的故障条件包括对称故障和非对称故障。其中,ATP软件用于在所有故障条件下模拟OHTL。从ATP程序获得的结果用于计算正常和故障条件下的管道感应电压。设计了缓解系统,以在正常和故障情况下最大程度地减少OHTL对管道的影响。正常情况下,在架设接地系统(缓解系统)后,测量管道感应电压,并将其与计算值进行比较。此外,在缓解系统安装之前和之后,对在正常操作下的感应耦合以及在OHTL的单相接地故障条件下的感应和导电耦合所引起的管道涂层放电电流和管道AC电流密度进行了计算和分析。 (C)2015 Elsevier B.V.保留所有权利。

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