Research on Optimal Configuration of Isolated-island Micro-grid Capacity

With the continuous development of electric power technology, the forms of electricity use are gradually dispersed and diversified. The isolated-island micro-grid uses the advantages of clean and recyclable renewable energy to solve the problem of inconvenient electricity in remote areas such as islands and borders, and the island micro-grid of wind and firewood storage is widely used. However, both PV and wind power generation have randomness, in order to ensure the reliability of power supply, it is necessary to have a reasonable wind-wind wood storage capacity to ensure the stable operation and economy of the micro-grid system. Based on the actual project, this paper carried out research on capacity optimization allocation of island-type micro-grid, adopted a lithium battery energy storage system with low unit cost, high efficiency, fast response speed and small footprint, and built a life cycle model of micro-grid system based on stability constraints, renewable energy resources penetration constraints, energy storage state constraints and power constraints. Finally, particle swarm optimization is used to solve the problem, and the rationality and feasibility of the island-type micro-grid configuration method are demonstrated.