Ausenco was engaged by BC Hydro through their Repeatable Design and Engineering Services (RDE) program. This program evaluates essential transmission projects which require upgrades or replacements due to aging infrastructure. Designing overhead powerlines and high-voltage equipment throughout British Columbia, our team is providing services for project voltages of 69 kV, 138 kV, 230 kV, and 500 kV.
The challenge
Transmission line engineering requires careful design considerations for various climate needs. To provide services for consumers, the reliable and safe transmission of electricity over long distances is essential. With substantial variation in wind and ice loading conditions, structures and conductors can be affected differently. Challenging geography and mountainous terrain in the many parts of the province add to the complexity of the linear infrastructure design. Line routes are also often located in remote areas with difficult access, posing another challenge.
The better way
Because of our electrical expertise and commitment to safety, our aligned values with BC Hydro set the stage for each RDE transmission project. Our experts overcame the challenges of the various climate zones by calculating specifically for wind, ice, and other weather elements. We also were able to access remote locations with minimal disruption to the environment.
To meet the requirements of the RDE program and revive aging infrastructure, our experts provided services for various project types including:
- Aircraft obstruction markers, located primarily at water crossings or near flight paths.
- Overhead ground wire projects involving the addition of shield wires for lightning protection.
- Designs of 69 kV pole mounted disconnect switches manually, and motor operated.
- And replacements for wood poles that had reached the end of their life cycle.
Outcomes and achievements
Ausenco used 3D analysis software to accurately model transmission conductors and supporting structures, and used laser survey data to model surrounding terrain. This technology allowed our experts to determine conductor clearances above ground, and from other obstructions including buildings and trees. Thus, improving the reliability and safety of the transmission lines.
Our team assessed each project structure across the province, analyzing and confirming the loads on supporting structures, connections, and clearances to meet safety and design standards.