Al-Gabalawy Mostafa A, Mostafa Mohamed A, Hamza Abdel Salam, Hussien Shimaa A
Electrical Power and Control Department, Pyramids Higher Institute for Engineering and Technology, 6th October, Cairo, Egypt.
Electrical Power and Machines Department, MUST University, 6th October, Cairo, Egypt.
Heliyon. 2020 Mar 6;6(3):e03417. doi: 10.1016/j.heliyon.2020.e03417. eCollection 2020 Mar.
The problem of AC corrosion remains motivating for researchers because many factors influence the corrosion rate for buried pipelines due to the interference with overhead high voltage transmission lines (OHVTLs). Many researchers study the mechanisms of induced alternating current (AC) voltages, which are summarized as capacitive, inductive, and conductive coupling. In this work, only the induced AC voltage on the pipelines due to inductive coupling in steady-state conditions is studied. A holistic mathematical model for the pipelines, power lines, mitigation equipment for the induced voltage, and cathodic protection (CP) is illustrated. Potassium hydroxide polarization cells are electrically represented because these cells are considered the most common mitigation device for discharging the induced AC voltage from the pipeline to the soil. The overall model is implemented using MATLAB. The results show the profiles of induced AC voltage along the pipeline, the CP for the pipeline, the points of maximum voltage, and the influence of installing the AC mitigation units on the CP performance.
交流腐蚀问题仍然激励着研究人员，因为由于与架空高压输电线路（OHVTLs）的干扰，许多因素会影响埋地管道的腐蚀速率。许多研究人员研究感应交流（AC）电压的机制，这些机制可概括为电容耦合、电感耦合和传导耦合。在这项工作中，仅研究稳态条件下由于电感耦合在管道上产生的感应交流电压。阐述了管道、电力线、感应电压缓解设备和阴极保护（CP）的整体数学模型。对氢氧化钾极化电池进行了电气表示，因为这些电池被认为是将管道上感应的交流电压排放到土壤中的最常见缓解装置。使用MATLAB实现了整体模型。结果显示了沿管道的感应交流电压分布、管道的阴极保护、最大电压点以及安装交流缓解装置对阴极保护性能的影响。
