Double Layer Energy Management Method Of Electricity-hydrogen-heat-cooling For Zero Carbon Energy Supply Building

With the goal of "double carbon" and the steady promotion of new power system construction,clean and low carbon energy forms will gradually become the key direction of energy development.As one of the main bodies of final energy consumption and carbon emissions,buildings will be the key focus area for deep decarbonization of the power industry in the future.Hydrogen energy is an efficient and economical distributed energy solution.It is of great significance to the development of renewable energy and the improvement of building energy efficiency by coupling hydrogen energy storage with renewable energy and coordinating various energy conversion equipment to achieve zero carbon building energy supply.This paper conducts research on zero carbon energy supply buildings and proposes a double layer energy management method of electricity-hydrogen-heat-cooling based on MPC theory.Firstly,in view of the multi-energy load demand of the building,this paper constructs a zero carbon energy supply building energy structure with photovoltaic,alkaline electrolyzer,proton exchange membrane fuel cell,battery,ground source heat pump,electric chiller,absorption chiller,hydrogen storage,heat and cooling storage equipment.The mathematical model of energy supply system and building heating and cooling load was established.The output characteristics of photovoltaic,alkaline electrolyzer and proton exchange membrane fuel cell are analyzed by simulating the established mathematical model.Secondly,by analyzing the building energy coupling relationship,a double layer energy management method framework containing economic optimization and MPC optimization is proposed based on MPC theory.In the economic optimization,by considering the constraints of each energy storage state and the operation boundary conditions of controllable equipment,the objective function of economic optimization is established with the goal of economic and stable energy supply of the system,and it is linearized by using the MLD modeling theory.In the MPC optimization,the MPC state space prediction model is established by optimally selecting control variables,state variables,output variables and disturbance variables.Multi-objective,multi-constraint MPC online rolling optimization objective function is established by setting the MPC relaxation constraint penalty variable.Finally,according to the different characteristics of electricity-heat-cooling load in winter and summer,set the MPC optimization target weight,and complete the simulation of typical buildings in north China in winter and summer by using MATLAB and GUROBI optimization solution software.The rationality of the building energy structure and the effectiveness of the energy management method proposed in this paper are verified through the collaborative interaction analysis of the multi-energy supply subsystems of the building in winter and summer.