Optimal maintenance scheduling for transmission lines

Özmen, Engin Berk
The fundamental mission of a transmission system operator is to supply desired electricity to all parts of the network continuously within acceptable economic and quality standards. Transmission lines provide the essential infrastructure to carry the power from generation stations to customers. Maintenances of the transmission lines are of great importance for not only power system reliability but also operational costs and equipment life span. Furthermore, operating the system with all available equipment holds the system at most secure level. This thesis presents a methodology to form optimal schedule for yearly preventive maintenances of transmission lines with minimum duration of maintenance condition. Network and operational constraints are included in the problem considering the power systems that have seasonally changing load and generation profiles. In order to model and solve the optimization problem, linear power flow and linearization techniques are utilized. Furthermore, a relaxation method is developed and applied to the large-sized problem in order to eliminate excessive time requirement of solution with actual method. The proposed methodology and relaxation method was applied to Turkish Power Network model of 2017. The obtained schedules are evaluated, and tradeoffs between the actual and relaxation methods are presented.


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Citation Formats
E. B. Özmen, “Optimal maintenance scheduling for transmission lines,” M.S. - Master of Science, Middle East Technical University, 2018.