Maintenance scheduling based on two level hierarchical structure to equalize incremental risk

The authors propose a new goal of maintenance scheduling, which is to equalize incremental risk, such as loss-of-load-probability throughout the year, rather than to equalize risk or reserve. It is shown that better schedules can be found using this method. In order to simplify the combinatorial problem and optimize maintenance scheduling, the authors propose an approach based on a two-level hierarchical structure model for solving the maintenance scheduling problem. An example of a system consisting of 19 generating units whose maintenance periods are not the same is used to illustrate the application of the new approach to maintenance scheduling. The results show that the proposed approach is profitable and efficient for large-scale power systems.<>