Research On Planning Configuration And Optimal Operation Of Multi-Energy Complementary Microgrid

As a new energy system with multiple energy and multiple loads,t he multi-energy complementary microgrid can make up for the disadvantages of instability and intermittent renewable energy output,and improve the stability and reliability of the microgrid.Since there are many types of energy supply equipment,energy storage equipment,and loads in the multi-energy complementary microgrid.The planning and configuration of the microgrid is a prerequisite for stable operation In addition,the power supply relationship in the microgrid is complex,and the energy is coupled.Optimizing the power of each equipment unit is necessary for economic operation.Firstly,this paper proposes the structure of the multi-energy complementary microgrid,and analyzes the overall working mode of the microgrid system and each equipment unit.Use photovoltaic as a renewable energy power generation unit.Choose batteries,thermal storage tanks,and cold storage tanks as energy storage units.Use sewage source heat pump and air source heat pump as cold source and heat source unit.Choose electric boiler as auxiliary heat unit.Analyze the working principle of each equipment unit and establish mathematical models.Secondly,in order to solve the problem that the microgrid configures t he capacity of equipment in the system according to the peak load during the planning stage,which leads to the problem of too large configuration selection,the load loss rate is added to the constraint conditions to configure the microgrid.The total annual cost of the initial annual inves tment cost,the interaction cost with the public grid,and the annual operation and maintenance cost is used as the optimization target of the planning configuration.,and the constraint conditions such as power loss,heating and cooling load rates are assisted to construct the mathematical model of the planning configuration.Using particle swarm algorithm to solve the optimal configuration of multi-energy complementary microgrid based on hourly load data,that is,the capacity of each unitThirdly,considering the two goals of economy and environmental protection,a mathematical model for the optimal operation of the multi-energy complementary microgrid is established.Aiming at the complex operation of numerous equipment units in the microgrid,the operat ion strategies of different equipment units are proposed to improve the authenticity of the operation plan and reduce the complexity of operation.Then,through the case analysis of three different typical days,the single-objective particle swarm algorithm is used to solve the optimal operation schemes respectively,and the economic and environmental protection of the proposed mathematical model for the optimal operation are verified.Finally,based on the traditional multi-objective particle swarm algorit hm,the multi-objective particle swarm algorithm is improved.Improve the performance of the algorithm.Introduce the update strategy of the particles in the population,the update and selection strategy of particle optimal solutions,archive,and global optimal solutions.Introduce mutation operation and propose particle mutation strategy.Use the multi-objective optimization problem test function to verify the effectiveness and necessity of the proposed strategy.Through case analysis,the proposed improv ed algorithm is used to solve the multi-objective optimization operation problem and solve the dual-object conflict problem of the multi-energy complement ary microgrid.