Configuration Optimization of Capacity of Standalone PV-Wind-Diesel-Battery Hybrid Microgrid

Standalone PV-wind-diesel-battery hybrid microgrid supplies power to local loads by power sources within the microgrid,and the primary target is to enhance the accouplement between the generated power and the load maximally.To improve the economy of whole microgrid while the power supply reliability is ensured,it is necessary to perform optimal design of capacity configuration of the microgrid according to existing conditions in whether and resources and to choose optimal source capacity combination.Mathematical models for different kinds of power sources within the standalone PV-wind-diesel-battery hybrid microgrid are established respectively,and two economic models of investment cost and different expenses are built too.Based on the dispatching strategy and constraints of this hybrid system,the numbers of different power sources are taken as variables and the minimum composite cost and expenses as optimization objective,and then the optimal capacity configurations of different power sources in the system are solved by genetic algorithm.The reasonableness of the proposed models is verified by case study results.