Reliability modeling of overhead power lines
LG&E and Internally Funded Brian Lenhart Masters Student University of Louisville Dept. of Electrical and Computer Engineering
This project is sponsored by the University of Louisville Center for Infrastructure Research and LG&E. The project’s goal is to examine overhead power lines in Louisville and determine how their properties have changed due to environmental factors such as weather and tree limbs, as well as changes do to annealing of the conductors by high fault currents. Test methods include physical examination of the specimen for wear or damage, elemental composition, tensile strength, and resistivity. The results from the testing are cataloged in a database according to the geographic location from which the sample was taken. Budgetary constraints only allow for the replacement of a certain number of lines each year, and there currently is no method to determine replacement priority. The sample data collected will be used to assist LG&E in the implementation of preventative maintenance for overhead power lines.
Figure 1 Tensile Test result 4, 7 Strand Cu