AC potential on pipelines nearby EHV power lines due to Low Frequency Induction

The effect of Low Frequency Induction (LFI) on pipelines has become a focus in recent years due to improvement in pipeline technology, the increase in load current level and an increased tendency to locate pipelines in power utility corridors. In this paper, a three phase double circuit extra high voltage Transmission line (220kV- EHV TL) running in parallel to a pipeline located above ground is presented and analyzed by applying the Alternative Transient Program Launcher which is the modelling version of the Electromagnetic Transients program (ATP/EMTP). Modeling, simulation and analysis of this system is presented in this paper to investigate LFI impact on the pipeline with respect to the separation distances for different soil resistivity and the induced potential on pipeline with respect to soil resistivity when the pipe is located above ground at different location profiles. The analysis has covered only two categories of interferences: the capacitive and inductive interferences since the pipeline is under load LFI impact (inductive) and located above ground (capacitive). Moreover, the induced potential on pipeline in case of LFI is discussed and compared to each for two load current values when the system is experiencing load LFI conditions.