Modeling And Operation Optimization Method Of Mine Integrated Energy System Considering Derived Energy Characteristics

The development of society is accompanied by the increasing demand for energy and the increasing diversity of energy utilization methods.Fossil energy still accounts for a large proportion in the overall energy utilization,and its exploitation and utilization are accompanied by a series of ecological environment problems.Regional Integrated Energy System(RIES)has become a research focus in order to achieve clean,intelligent and integrated energy utilization with the proposal of China’s dual carbon goal.Mine integrated energy system(MIES)is a typical and unique RIES.The urgent demands of green mining and abundant derived energy make it great significance.This thesis focuses on MIES,and on the basis of constructing its general structure,the theory and method of operation optimization in MIES are deeply studied.Firstly,considering the effective utilization of mine derived energy,the basic structure of MIES is constructed.After investigating the energy supply characteristics of MIES,analyzing the utilization mode of MIES,and identifying the types and usage of energy coupling conversion equipment,the thesis gives the mechanism model of each energy conversion equipment in the system.Based on this,the MIES structure is further constructed,which includes four stages,i.e.,energy supply,energy conversion,energy storage,and energy demand,the actual situation of the system’s energy supply and demand is clarified,and the characteristics of the system’s energy conversion is analyzed.Secondly,the operation optimization model of MIES under variable conditions of typical equipment is given.Based on the general structure of MIES,the influence of the change of key characteristics of various derived energy on the operation of corresponding energy supply equipment is analyzed,and the dynamic energy efficiency model of the mine derived energy utilization equipment is given.Then,the flexible and controllable characteristics of multi-energy load on the load side are discussed,and the integrated demand response model including electrothermal flexible load is constructed.Furthermore,the day-ahead operation optimization model and its solution method are given with the goal of lowest operation costs of system.The GUROBI solver is used for example simulation,and the experimental results under different operation scenarios show that the established MIES operation optimization model effectively improves the economy of system operation.Finally,the low-carbon economic operation optimization model of MIES considering uncertainties of energy supply is given.On the basis of the general structure of MIES,the low-carbon requirement of system operation is introduced,and the energy flow and carbon emission flow system structure of MIES is established.Considering the system carbon emission constraints,the low-carbon economic operation optimization model of MIES is constructed with the minimum operation cost and carbon emission as the objective function.Then the multiple uncertainties of the system are modeled and analyzed with the robust model under the risk aversion strategy of information gap decision theory(IGDT),and the model transformation method is designed for the optimization model of low-carbon economic operation.The simulation results under different operation scenarios show that the model can effectively reduce the carbon emissions of the system operation,and the uncertainty treatment strategy can obviously improve the robustness of the operation scheme.The thesis includes 27 figures,8 tables and 88 references.