| With the development of economy and society,the increasing demand for energy has brought a series of problems,such as the greenhouse effect,resource depletion,environmental degradation,and so on.How to build a low-carbon and clean energy system is one of the main challenges facing China.As a clean energy system with multiple complementary advantages,integrated energy systems can improve the efficiency of primary energy utilization,achieve large-scale development and utilization of renewable energy,and promote energy conservation and emission reduction in the system.Mine Integrated Energy System(MIES)is a typical and unique regional integrated energy system.This thesis takes the mine system as the subject and,based on the architecture of the mine integrated energy system,considering demand response strategies and a stepped carbon trading mechanism,and delves into the research of operational optimization model and solution methods of the mine integrated energy system.The main research contents are as follows:(1)Introduce the working principles and models of typical equipment related to associated energy.Analyze the characteristics and utilization forms of mine associated energy such as coal bed methane,exhaust air,and water inrush in mines,and provide mathematical models for typical equipment related to associated energy in the mine integrated energy system,such as gas turbines,exhaust air heat storage devices,and water source heat pumps.Explain their energy conversion principles,and clarify the role and operation mode of equipment in the actual system.(2)The optimization model and solution method for the day-ahead economic operation of the mine integrated energy system are presented.Firstly,the coupling characteristics of energy input,output,and transformation in the mine energy supply environment are analyzed,and the basic architecture of the mine integrated energy system is given.Then,based on the historical forecast data of wind and solar power output,electricity heating cooling load of the mine integrated energy system,and taking into account the parameters of each unit and electricity price,an optimization model for day-ahead economic operation of MIES is established.Subsequently,based on the Yalmip toolbox,an optimization model was built on the MATLAB platform,and a solution method based on the CPLEX solver was given.Through the optimization results under typical scenarios such as winter,summer,and transition season,it can be seen that the established model fully utilizes mine associated resources,while improving the consumption level of renewable energy and various energy utilization efficiency.(3)Considering the stepped carbon trading mechanism and integrated demand response,a low-carbon economic operation optimization model and solution method for the MIES system are presented.Firstly,the impact of electrical/thermal flexible loads on the operational effectiveness of mine integrated energy systems is revealed,and a load model for electrical/thermal flexibility is presented;Secondly,the carbon penalty cost is introduced into the system operation optimization,and a low-carbon economic operation optimization model for the mine integrated energy system is established by comprehensively considering the system energy purchase,operation and maintenance,carbon penalty,flexible load scheduling compensation,and waste associated energy costs.Subsequently,using the piecewise linearization method,the carbon emissions of the system are treated as a linear function,and a solution method based on the CPLEX solver is given.By comparing traditional carbon trading mechanisms with stepped carbon trading mechanisms,as well as scenarios such as the presence or absence of flexible load participation,the effectiveness of the proposed model in taking into account the low carbon and economic aspects of the system,and improving wind power utilization is verified.This thesis has 34 pictures,9 tables and 81 references. |
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