Investigation of AC interference on underground gas pipeline due to parallel overhead high voltage power line

Abstract

Energy consumption in Indonesia is increasing along with the increasing population and industrial activities. Because of this phenomenon, high-voltage power transmission systems are needed to fulfill the energy consumption. The condition where high voltage power lines influence the gas pipeline makes the interaction more complex and results in AC interference, which may be dangerous to the application. Besides that, the adjacent pipeline and high voltage power lines condition may cause interference, a potential hazard for pipelines, operators, and surrounding local communities. In this paper, the characteristics of AC interference were studied on the underground gas pipeline due to parallel overhead high voltage power lines in the actual situation. The results of the theoretical mathematics calculation are compared to actual measurements to validate the approach. Besides that, the AC interference was also analyzed using several calculation models in steady-state and fault operation conditions. The AC corrosion tends not to happen in the steady-state condition because the current density value was below the limit of 20 A/m2, indicating a low chance of AC corrosion. In the fault operation condition, the T.02-D showed a high value of maximum voltage (62 kV) that exceeds the safe value of coating dielectric breakdown voltage. Therefore, mitigation was needed to prevent voltage spikes in lightning operation conditions.