MAINTENANCE SCHEDULING OF HYDROTHERMAL. POWER -STATIONS

Abstract

The increasing size and complexity of power systems have introduced the need for a more systematic approach to the determination of maintenance schedules for power generat-ing facilities. The application of mathematical programming technique in the solution of maintenance scheduling problems is of a great interest and importance to utilities. The present work is primarily concerned with the development of mathematical models and maintenance scheduling algorithms for a decision making situations arising in the functioning of a power plant or group of power plants under centralized administration. First of all, the problem of preventive maintenance scheduling is discussed. In it number of objective criteria for optimal maintenance scheduling of generators is discussed. The criteria are based on reliability indices, deviation from a desired schedule, constraint violations and minimum functions. A mathematical model for finding maintenance scheduling the policies of generating units is developed in the presence of uncertainities. This problem is an integer programming having only o - 1 variables. A method based on lexicographic enumeration technique is developed for its solution. The operation of the method is exemplified by application to a realistic system.