Research on capacity configuration optimization for island microgrid with PV-wind-diesel-battery and seawater desalination load

Abstract

According to the situation of abundant renewable energy but insufficient fresh water on the island, using seawater desalination equipment as a time-shifting load can better absorb the output of renewable energy and eliminate the surplus electric energy. In this paper, the optimal configuration of wind solar diesel storage island microgrid capacity considering the time-shifting load of seawater desalination equipment is studied. The optimal allocation model of island microgrid capacity with wind solar diesel storage and seawater desalination load is established. The optimal objective function of capacity allocation is the system equivalent annual investment cost. The results show that considering the time-varying load of seawater desalination equipment, the optimal configuration strategy of wind solar diesel storage island microgrid capacity can improve the consumption of renewable energy, reduce the waste of capacity, solve the problem of island freshwater shortage to a certain extent, and improve the economic and environmental benefits of the island.