Structural Optimization of a Self-sustainable Decentralized Energy System by Mathematical Programming Techniques☆

Abstract The renewal of conventional energy systems is an important countermeasure against the effects of global warming and natural disasters. A self-sustainable, decentralized energy system is one of the promising solutions for future sustainable and resilient societies. The Nushima Project attempts to construct a prototype of a self-sustainable decentralized energy system based on DC power distribution of the renewable energy on Nushima island, an isolated island in Japan. In this paper, under the Nushima Project, a mathematical programming model is formulated and design and utilization of the overall DC micro grid system is optimized based on the model, where the system is equipped not only with stationary batteries but also with mobile batteries. Through the results of numerical simulations, the effectiveness and the potential of the proposed model are investigated, including clarifying the effect of the batteries.