Optimal Energy Scheduling For Household Microgrid Grid-Connected Operation Considering Weather And Load

With the worsening of environment and energy shortage,it is imperative to vigorously develop renewable energy generation.Household microgrid is a small power system which integrates the production,storage and consumption of electric energy.It is very important to study its economic stability.For the household microgrid with photovoltaic power generation system and many household loads,the load operation state and the total system operation cost are not the same under different weather conditions.To explore the photovoltaic output under different weather conditions for family micro power grid load running status and the influence of the total cost,based on the four different types of weather situation,to light the family micro grid storage system operation,with target of minimizing the total cost of operation condition of the family load are analyzed respectively,and as a family schedulable load,the operation of the energy storage system as a constraint condition,To optimize the operation energy of the system,the total cost of the home microgrid system is finally reduced under the premise of safe and stable operation.The specific research contents of this paper are as follows:(1)This paper introduces the development history of home microgrid and its basic components,and establishes the mathematical models of photovoltaic power generation system,energy storage system and household electricity load in home microgrid.Then,the overall optimal scheduling framework of light storage home microgrid system is built,and the working state of photovoltaic and energy storage system is analyzed.(2)According to the photovoltaic power generation,the relative size of household power consumption and operation mode,the system optimization scheduling strategy is proposed.The mathematical model is established based on the objective function of minimizing the total operating cost of the system,and at the same time,each part of the system satisfies various constraints.(3)Considering the influence of weather on load and power supply at the same time,the Cplex solver is used to solve the system objective function,and finally the system optimization scheduling results are obtained,and the simulation results are illustrated.(4)Finally in only considering the influence of weather on load,only consider the influence of weather on power supply and at the same time,considering the influence of weather on load and power supply three kinds of different situations,respectively for the optimization of scheduling results are analyzed,the results show that at the same time considering the effects of the weather of the load and power optimization scheduling results are more accuracy than single side scheduling At the same time,the rationality and effectiveness of the proposed optimal scheduling strategy are verified.