Interference modelling
Predicting induced voltages along the shared corridor from the power system parameters and the pipeline geometry.
AC Interference Mitigation
Managing the induced AC that appears where pipelines share a corridor with power infrastructure.
Cathodic Protection
Pipelines running parallel to high voltage transmission pick up induced AC. At best it corrodes the pipeline in ways cathodic protection does not prevent; at worst it is a touch voltage hazard for anyone working on it. Mitigation is a modelling problem first and an installation problem second.
What the work covers
Field measurement
Measured AC voltages and current densities, because models are only as good as the assumptions behind them.
Mitigation design
Gradient control mats, earthing and decoupling devices sized to bring both corrosion risk and touch voltage inside limits.
Safety compliance
Designs assessed against touch and step voltage limits, at test points and anywhere people routinely work.
Installation
Supply and installation of the mitigation system, coordinated with the existing protection scheme.
Verification
Post-installation measurement proving the levels came down and stayed down.
Typical applications
- Pipelines
- Storage tanks
- Buried metallic structures
- Submerged structures
- Offshore and marine structures
- Structural piles
- Industrial facilities
- Reinforced concrete
Tell us about the structure.
Location, structure type and any survey work already done is enough for us to say what the next step is.
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