Overhead versus Underground: Designing Power Lines for Resilient, Cost-Effective Distribution Networks under Windstorms

Windstorms represent a particular class of highimpact, low-probability events that is highly likely to damage distribution poles and pull down overhead lines in vulnerable areas. As a result, when a windstorm occurs, the costs associated with damaged overhead corridors and energy not supplied may be too high. Conversely, the costs associated with the installation of underground distribution lines are expensive in comparison to overhead distribution lines and may not compensate for the penalties avoided for the loads lost. In this scenario, this article assesses the costs and risks associated with underground and overhead power lines for a resilient, cost-effective planning and operation of power distribution networks under windstorms. Thus, it calculates the accumulated costs associated with installation, operation, and repair of power distribution lines, as well as the penalties for the energy not supplied, subject to the probability of failure of individual components over time, to determine which power line setting is the most appropriate in terms of resilience and costs.