Maintenance Scheduling of Transmission Bays Considering Selective Opportunistic Maintenance Strategy

Unlike previous research which didn't consider opportunistic maintenance between dependent power equipment in power system, opportunistic maintenance strategy is modeled and the impact of opportunistic maintenance strategy on maintenance scheduling of transmission bays is investigated in this paper. According to the economic dependence within a transmission bay, the concept of selective opportunistic maintenance is proposed. In the selective opportunistic maintenance problem, when the equipment in a transmission bay fails, decisions have to be made on whether other equipment is preventively maintained. Firstly, in order to determine the optimal inspection rates and opportunistic maintenance strategy for power equipment, the availability function of the transmission bay is derived. And then, expected system outage cost incurred from equipment maintenance or failure are quantified. Finally, the system maintenance scheduling model is given, with the goal of minimizing the system outage cost. Case studies on typical transmission bays reveal feasibility of the proposed model.