Abstract
High voltage overhead transmission lines (HVOHTLs) often pass close to metallic pipelines. The parallelism between HVOHTLs and pipelines, where electromagnetic fields couple them, may cause several problems. If the pipelines are metallic, a corrosion problem has occurred because these fields induce an AC voltage on the pipelines. This paper presents a novel contribution of a low electrical hazard that can control by grounding the pipelines with a polarization cells system to mitigate the induced AC voltage without deteriorating the cathodic protection (CP) performance. This work further utilizes a comparative analysis of two different mitigation units: a potassium hydroxide polarization cell (KOH-PC) and the solid-state polarization cell (SS-PC) to decide which one of these methods is more suitable for cathodic protection distribution. This paper also explores the potential of the hill-climbing algorithm in optimizing the two proposed mitigation units’ parameters to guarantee better CP performance. Moreover, the effect of changing the numbers and parameters of polarization cells on both induced AC voltages and CP performance is introduced to achieve a global minimum DC voltage degradation. From the comparative analysis, it is observed that SS-PC is more controllable in comparison with KOH-PC in mitigating the induced voltage and minimizing the DC voltage disturbance. Therefore, the SS-PC is considered the most efficient mitigation technique due to fewer potential safety hazards produced. The proposed model is implemented through simulations on the MATLAB/Simulink platform with experimental validation. The obtained results reveal that the robustness of SS-PC in mitigating the induced voltage with minimum disturbance in the DC CP voltage. Also, it is found that the effectiveness of the hill-climbing algorithm for optimizing the polarization cell's parameters and has capable of compensating the cathodic protection disturbance.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call