AC Mitigation

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AC Mitigation

AC power is not typically found on pipelines. If an AC voltage is present on a pipeline, it has come from one of three effects: inductive, capacitive or conductive coupling. AC currents flowing through power line conductors cause alternating magnetic fields to be set up around the conductors. These magnetic fields in turn induce opposing AC voltages in any metallic object that is within the influence of the power line. Pipe walls can be affected by AC interference through AC corrosion, external coating damage and pipe wall damage. AC mitigation for pipelines can be designed, installed, and maintained to minimize the induced voltage on the system. This can be accomplished by installation of grounding techniques, such as grounding rods attached to the pipeline.

Some of our previous projects for AC Mitigation include:

  • AC Electrical Interference modeling and design for Pembina Pipeline Corporation regarding the AltaLink Heartland 500kV power line project.
  • AC Electrical Interference study for the Pembina Pipelines facilities affected by the new ATCO Electric Edith Lake power line, the new AltaLink Spruce Grove 595S substation and area growth, and in Drayton Valley affected by the new AltaLink power line 673L
  • We also did a DC Electrical Interference project for Pembina Pipelines on their facilities are affected by the proposed WATL 500kV HVDC power line.
  • We did AC Electrical Interference study program on Kinder Morgan 6” Jet Fuel line for Kinder Morgan Canada on Lulu Island. Evaluated AC corrosion concerns near Jones Hill rectifier on the TransMountain Pipeline for Kinder Morgan Canada, and a DC Electrical Interference study on Kinder Morgan 6” Jet Fuel line due to the operation of the Canada Line Sky Train on Sea Island in Vancouver.
  • We have done extensive AC Electrical Interference study work for ATCO for the ATCO Pipelines facilities affected by the new AltaLink Spruce Grove 595S substation and area growth, AltaLink Yellowhead Transmission Reinforcement Project – Edson to Hinton. AC Electrical Interference study, design and installation for the ATCO Pipelines Priddis Extension Project, the Bragg Creek pipeline system, SEEP pipeline system in the Edmonton area, and Muskeg River Pipeline project.

A few of the many other projects have included:

  • AC Electrical Interference modeling and design for Imperial Oil Limited regarding the AltaLink Heartland 500kV power line project
  • AC Electrical Interference studies on nine CNRL gathering facilities affected by the Cassils-Bowmanton power line project.
  • AC Electrical Interference study for Crew Energy Tilley oil gathering system affected by the Cassils-Bowmanton power line project.
  • AC Electrical Interference study for the Penn West Petroleum Meekwap Sales Line.
  • AC Electrical Interference study for the relocation of BC Hydro distribution power lines adjacent to the Kinder Morgan Trans Mountain pipeline near Bairiere BC.
  • AC Electrical Interference study for the proposed Williams Horizon Lateral.
  • AC Electrical Interference study on the installation of new Epcor duct banks and transformers near to the Kinder Morgan Canada Trans Mountain pipeline.
  • AC Electrical Interference study for the Penn West Petroleum Drayton Valley pipelines influenced by the new AltaLink power line 673L.
  • Evaluated the proposed AltaLink Heartland crossing of the NPS12 Boreal Pipeline belonging to Williams Energy (Canada) Inc.
  • AC Electrical Interference study and site specific designs for the AltaLink Yellowhead Transmission Reinforcement Project – Drayton Valley on behalf of Pembina Pipelines.
  • AC Electrical Interference study and site specific designs for the AltaLink Yellowhead Transmission Reinforcement Project – Edson to Hinton on behalf of Kinder Morgan – Canada.
  • Initial AC Electrical Interference study of the proposed KLNG pipeline at Kitimat, British Columbia.
  • AC Electrical Interference study of the CNRL Septimus gathering system.
  • AC Electrical Interference study on TransCanada pipelines due to the operation of the AC Mitigation systems on the Williams Energy Boreal Pipeline.
  • AC Safety Supervision for work at the ATCO Pipelines Edmonton Hydrogen Delivery Station.
  • AC Electrical Interference study on the AltaGas Utilities and MEC pipelines affected by the proposed AltaLink 325S Substation and associated power lines in Leduc County.
  • AC Electrical Interference study on the Provident and Williams pipelines in and around Josephburg Substation near Shell Scotford.
  • AC Electrical Interference study on the Caltex Energy Kakwa gas gathering and sales pipeline system.
  • AC Electrical Interference study on the ConocoPhillips Canada Surmont Lateral Pipelines.
  • AC Electrical Interference study for the Williams Energy Boreal Pipeline.
  • AC Electrical Interference study for the 24NPS Nipisi Pipeline Project for Pembina Pipeline Corporation.
  • AC Electrical Interference study for the Noel Gas Gathering system in British Columbia belonging to BP Canada Energy Company.
  • AC Electrical Interference study, design and installation for the AltaLink Management SW Transmission Development Project 240 kV as it affects the ATCO Pipelines Willowbrook Laterals.
  • AC Electrical Interference study for the AltaLink Management 240 kV Watson Creek power line project with regards to Kinder Morgan – Canada and ATCO Pipelines.