Multi-objective Optimization Scheduling Method for Islanded Micro-grid with PV,Wind Turbine, Diesel Generation and Storage Batteries

The optimization scheduling optimization method for islanded micro-grid operation is studied in this paper. The typical structure of islanded micro-grid and function of each component are introduced. Based on the analysis of operational characteristics of PV, wind turbine generation and energy storage system, the mathematical model of the multi-objective optimization scheduling is proposed by considering diesel generation and energy circulation of energy storage system. Such constraints as the range of the charging/discharging power and SOC (state of charge) of the energy storage system, the value scale of power generated by diesel and the balance of system power are built. Then the multi-objective optimization model is solved by NSGA-II algorithm. For a test case under the situation of different solar radiations and wind levels, several Pareto solution sets are obtained, from which typical dispatching scheme is selected to verify the models rationality by analyzing power flow of each component.