Low-Carbon Optimal Operation Of Mine Integrated Energy System Considering Coal Flow And Associated Energy Utilization

The carbon peaking and neutrality target requires decarbonization and higher efficiency of the mining process in coal mines.However,in the process of coal mining,the energy consumption and carbon emissions are high.At the same time of production,the associated water gusher,ventilation,air compressor waste heat is not optimally utilized.In this thesis,the topology of mine integrated energy system is established,which considers the coal flow process and associated energy waste heat utilization.The operation method of the power supply system with reverse coal flow and the heating system with associated energy utilization are studied respectively.Then,the coordinated operation scheduling of the electric-thermal systems is carried out.A low carbon optimal operation method is proposed.The specific research process is described as follows:Firstly,the topology of the mine power supply system is established.Based on the continuousness of coal flow in the work face,belt conveyor and silos,the coal delivery unit model is proposed to describe the relationship between coal delivery and nodal power injection.The coal delivery safety and power flow constraints are also integrated to derive the coal-power flow optimization model.To reduce the operation cost and carbon emission of coal mines,time-of-use carbon emission,the mining time slots,coal delivery velocity,delivery quantity,and units scheduling are optimized to obtain the optimal scheduling of the coal transportation and power system.To validate the effectiveness of the proposed method,simulations are conducted based on a real coal mine.Results show that the proposed model and method can effectively reduce the energy demand per ton of coal production,the daily operation cost and the carbon emission.Secondly,based on the analysis of mine heat load and associated energy characteristics,the topology of the mine heating system is established.To describe the operation model of the mine heating system in the form of multiple heat sources,the flexible characteristics of the bottom water sump,drainage pump,bathing heat load and other links are described.To reduce the operation cost and carbon emission,the electricity price and carbon emission factor,adjusting each drainage volume,heat source output and maintenance period is optimized to obtain the optimal scheduling of the mine heating system.A low-carbon operation scheme,and the economic and efficient carbon reduction of the scheme is verified by an example.Finally,the power supply system and the heating system are jointly scheduled to give full play to the virtual energy storage advantages of the coal silos and the water silos and the flexible characteristics of the bath hot water load.The operation model of the mine integrated energy system with material-energy flow coordination is established.And the YALMIP toolkit is used to solve the problem of optimizing operation of mine integrated energy system.Taking a coal mine in Shanxi Province as an example,the simulation analysis of mine integrated energy system based on the combination of electricity and heat is carried out.The simulation results show that the proposed model and method can effectively reduce the energy consumption cost and carbon emission of mine production.The proposed method realizes the low-carbon economic operation of the mine with the coordination of material flow and energy flow.In summary,the low-carbon optimal operation scheme of mine integrated energy system considering coal flow process and associated energy utilization provides a way of energy saving and carbon reduction for mines.It provides a reference for mine energy system management.Meanwhile,it is of great significance to the green mining of mines under the energy revolution and the realization of the carbon peaking and neutrality target.The thesis contains 51 figures,18 tables,and 85 references.