Research on Optimal Capacity Configuration for Distributed Generation of Island Micro-Grid with Wind/Solar/Battery/Diesel Engine

The accessing of renewable energy, such as wind and solar energy which is abundant on the island, can effectively alleviate increasingly serious problem of power shortage,creating conditions for the construction of an independent micro-grid. In order to meet the load demand in island micro-grid, this paper proposed the operation and control strategy of the isolated micro-grid system with wind/solar/battery/diesel engine based on the analysis of the basic characteristics of every distributed generation in the system. The corresponding mathematical model was built on the objective functions of minimizing the system total cost and maximizing the power supply reliability and it is constrained by the system power balance and the distributed generation output. The mathematical analytic method was adopted to optimize the number of every distributed generation in the micro-grid. The simulation was conducted on an island using the proposed model to obtain the optimal capacity configuration for distributed generation of the micro-grid, proving the model effective.