Phasing Optimization as a Mitigation Strategy for AC Interference on Collocated Pipelines (C2026-00303)
Wednesday, March 18, 2026
9:00 AM - 9:30 AM Central
Location: 372 EF
Earn .5 PDH
Interested in reading the entire paper? Click on the "Paper" button below to read on the AMPP Knowledge Hub!
*Please note, if your registration came with access to the conference proceedings don't forget to login to your AMPP Knowledge Hub account to access the paper for free. If you login and don't have access to the paper, you can purchase the individual paper or purchase the entire conference proceedings on your Knowledge Hub account.
High-voltage transmission lines constructed near buried pipelines can induce alternating current (AC) interference, posing safety and integrity risks under both steady-state and fault conditions. This paper highlights the application of transmission line phasing optimization as a practical strategy to mitigate AC interference and minimize the need for additional physical mitigation measures. A proposed 230 kV dual-circuit transmission line collocated with multiple natural gas pipelines was assessed using detailed modeling. Field data, including soil resistivity and pipeline facility surveys, were incorporated to evaluate induced voltages, and AC current densities. Various phasing configurations were analyzed to determine the arrangement that minimized inductive coupling between the transmission line and pipelines. Results demonstrated that optimal phasing was an effective method for lowering induced voltages and AC corrosion risks under steady-state conditions, substantially reducing the scope of AC mitigation required. This approach offers a practical and cost-efficient strategy for managing AC interference in pipeline corridors during the construction of new powerlines.
