Optimization Model of Island Multi-Energy Complementary Power Supply System Based on Life-cycle Cost

摘要

Most islands rely on long-distance power supply from the mainland，such as diesel power supply, overhead cable power supply and submarinecable power supply in China, while these island are rich in clean andrenewable natural resources like wave power, tidal power, wind powerand solar power. This paper studies the optimization model of IslandMulti-energy Complementary Power Supply System (IMCPSS) for thedecision-making of the optimal Energy Portfolio of island power supplysystem. The objective function of this model contains Construction Cost(CC), Operation Cost (OC), Maintenance Cost (MC), Failure Cost (FC)and Decommission Cost (DC), which covers the Life Cycle Cost (LCC).The constraint conditions are designed to meet the regular requirementsof electricity on island and the reliability of the island power supply, withthe goal of minimum LCC. Genetic algorithm is adopted to solve themodel to realize the optimal allocation of the IMCPSS. Daguan island ofQingdao is taken as an example to apply this model, and the result isanalyzed.