Economic Operation Of Sea Island Multi-energy Microgrid Considering Seawater Desalination

In recent years,my country has attached great importance to the development and utilization of islands.The traditional form of island energy supply is single,which cannot fully meet the daily needs of island residents,and the equipment investment and operation and maintenance costs remain high,which hinders the rapid development of the island.In response to these problems,an island multi-energy micro-grid with a controllable load seawater desalination system is established.The island multi-energy micro-grid includes electricity,heating,water,and cooling systems.Under the optimized configuration of the island's multi-energy micro-grid capacity,in order to protect the island's multi-energy microgrid.The energy micro-grid can be operated economically,and the economic operation model of the island multi-energy micro-grid has been established.The main research work of this paper is as follows:Firstly,topological structure and modeling analysis of island multi-energy microgrid.In order to improve the economy and environmental protection of the operation of multi-energy microgrids,and promote the synergy and complementarity between different energy sources.In this paper,an island multi-energy micro-grid including wind turbines,photovoltaic units,electric boilers,batteries,electric refrigerators,seawater desalination systems,and heat storage devices is built,and the mathematical models of each unit device are established to establish corresponding optimizations for the follow-up process preparation.Secondly,research on optimized capacity allocation of island multi-energy microgrid.This paper analyzes the relationship between the power and capacity of the relevant units in the multi-energy micro-grid,and establishes a mathematical model for the optimal capacity allocation of the multi-energy micro-grid on the island.The goal is to have the lowest total daily operating cost of the multi-energy micro-grid,of which the total daily operating cost Including daily investment costs and daily operation and maintenance costs,considering the energy balance constraints of the island multi-energy micro-grid and the operation constraints of each unit,finally,the feasibility of constructing the optimal capacity configuration model of the island multi-energy micro-grid was verified through simulation.Last but not least,research on economic operation of island multi-energy microgrid considering sea water desalination.Aiming at the capacity allocation plan in Chapter 3,the economic operation of the multi-energy microgrid is studied on this basis.Using the adjustable characteristics of the seawater desalination system,it can participate in the power adjustment operation of the island's multi-energy microgrid.First,predict the output of renewable energy and various load changes,and build a system that includes operation and maintenance costs,environmental governance costs,and fuel consumption costs.The day-ahead operation optimization model takes the lowest integrated operating cost of the island's multi-energy microgrid as the objective function;then simulates the two typical daily load and renewable energy forecast curves in winter and summer,adopts an improved genetic optimization algorithm,and follows the corresponding economic operation solution process,solve the economic operation model of the island multi-energy micro-grid,and verify the rationality of the seawater desalination system participating in the power regulation operation of the island's multi-energy micro-grid.