This project is centred around the direct application of capacity enhancing coatings to overhead transmission lines, semi-autonomously, in situ. This has the potential to increase the capacity of existing conductors by up to 30% without reconductoring or building new lines, a cost saving we estimate at 95%.
AssetCool (a UK based technology company) have developed a coating for overhead lines which reflects solar radiation and increases heat dissipation, thereby cooling them by up to 35%. This coating passively lowers the temperature of the line through spectral selectivity (simultaneous solar reflectivity and thermal emissivity). A reduction in operating temperature of overhead conductors permits a higher current carrying capacity or a reduction in power losses due to lower resistance. The ability to apply a coating robotically/autonomously to overhead conductors in-situ, which can increase capacity up to 30%, represents the ability to upgrade transmission capacity without reconductoring/building new lines.
A live pilot will take place with a private renewable energy generator in Southern Alberta, to increase the capacity of their tie line into the main Alta-Link system, permitting a greater export of renewable energy into the grid. The project will involve demonstrating the technology, verifying technical performance, process and economic improvements.