Goal programming approach to maintenance scheduling of generating units in large scale power systems

This paper presents a goal programming methodology for solving maintenance scheduling of thermal generating units under economic and reliability criteria. The advantages of a multicriteria approach are demonstrated by comparing the effects that costs and reliability have on each other in power plants maintenance scheduling. The problem is formulated as a large scale mixed integer programming problem implemented in the mathematical programming language GAMS and solved using OSL. Weekly maintenance scheduling of the large scale Spanish power system for a year period illustrates the proposed methodology.