Maintenance and refurbishment strategies for MV substations

Facing a competitive environment, electric utilities are being forced to rethink their maintenance strategies. Economic considerations point out the need for calculations which are capable to extend the lifetime of equipment and substations and allows an economic and reliable life cycle management. The ranking of the equipment gives the opportunity to select those which should be maintained first. If the ranking is derived from a reliability-centered maintenance strategy an optimum solution can be stated. In this paper, the term maintenance also covers the replacement of equipment as e.g. necessary for renovation