Abstract
Gas and oil pipelines are widely used to supply customers. They are often laid in parallel with high voltage power lines, sharing right of way. When the pipeline is located near overhead high-voltage power, corrosion caused by induced voltages from AC power lines can occur in utility pipelines. Therefore, the calculation of induced voltage is always required for both interference and maintenance workers as well as pipeline facility safety. For parallel distribution lines, the calculation method for the induced voltage is not suitable due to the excessive error caused by using the screening factors of the neutral current. For a more practical analysis of the induced voltage, a new analysis is needed using the actual neutral current and which also considers the overhead ground conductor and the neutral conductor. This paper analyzed the induced voltage from a parallel distribution system using Carson’s formula and vector analysis. Simulation analysis results are verified by separate Electromagnetic Transient Program (EMTP) simulation.
Highlights
There are important issues to consider by both electrical utilities and pipeline operators when an underground pipeline is located proximal to the ground level in overhead highvoltage power lines [1,2,3,4,5,6], namely safety and corrosion
The induced voltage on the pipeline is analyzed using Electromagnetic Transient Program (EMTP) based on various conditions: unbalanced loading conditions, different pole types, and the separation distance between the overhead distribution line (ODL) and the pipeline
(5), (10), VEMTP is the EMTP simulation result, and the difference will be calculated based on VEMTP
Summary
There are important issues to consider by both electrical utilities and pipeline operators when an underground pipeline is located proximal to the ground level in overhead highvoltage power lines [1,2,3,4,5,6], namely safety and corrosion. G. Lucca [9] analyzed the induced voltage and current from a transmission line in fault condition on a nearby buried pipeline with the EMF. Lucca [9] analyzed the induced voltage and current from a transmission line in fault condition on a nearby buried pipeline with the EMF These works focus on the interference of transmission lines and pipelines. The constant value of the screening factors that are currently used in the calculation of the induced voltage in distribution lines is the main cause of error [23,24], as it cannot consider unbalanced loading conditions in the distribution line.
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