Optimal Capacity Configuration for Distributed Generation Of Grid-connected Island Micro-grid

Aiming at the problem, which the optimal allocation of distributed power capacity of micro-grid for grid-connected operation in island, a mathematical model of distributed energy (Wind power generator, solar panels, diesel generators, batteries) was established, and the reliability modeling of submarine cables connecting the island micro-grid and the land grid was carried out, considering the influence of different conditions on the parameters of submarine cable model. Based on the distributed energy model and the island cable model, an objective function was established, considering the account of the initial equipment investment cost, operation and maintenance cost, replacement cost, transmission cost and allowance for the Internet cost. Under the constraint conditions of power supply reliability and power balance, the optimal capacity configuration was obtained by genetic algorithm. Finally, compared with the upgraded submarine cable, quantitative analysis was carried out by the rationality and economy of the island micro-grid.