Wildfire Mitigation Strategies for Power Lines

This technical report discusses various strategies for mitigating wildfire risks associated with power lines. It outlines the historical context of wildfires in North America and identifies power lines as a potential ignition source, particularly during high wind events when tree branches can contact lines or when lines fall to the ground. The report details several mitigation techniques, including the use of Aerial Covered Conductor Systems, which are designed to reduce the risk of ignition by preventing contact with vegetation and minimizing the potential for sparks. It also examines the effectiveness of undergrounding power lines, which, while aesthetically pleasing and less prone to ignition, comes with significantly higher costs and potential impacts on tree roots. Additionally, the report compares Spacer Cable and Tree Wire systems, highlighting their respective advantages in wildfire-prone areas. The findings emphasize the importance of proper design and materials in reducing wildfire ignition risks from power lines.