Impact of Non-Wood Poles on Reliability
For the past century, the electric utility industry has been utilizing predominantly wood poles to support both transmission and distribution overhead circuits. In recent years, distribution utilities have been progressively using steel, concrete, and fiberglass as substitutes for wood poles. In many cases these "new" materials are being combined on circuits with existing older wood structures. Since non-wood materials used for distribution strictures have very different lightning withstand and mechanical strength properties, DSTAR members are concerned about the impact on system reliability.
This project is focused on investigating the impacts of non-wood pole stucture (i.e. concrete, steel and fiberglass reinforced poles) on overall system reliability. The project is divided into three main tasks: lightning performance assessment, mechanical strength considerations, and impact on overall system reliability.
This project is ongoing. Final results are expected shortly.