Research On Energy-saving Optimization Planning And Management Of Thermal Power Project Based On Life Cycle Theory

The 13th Five Year Plan period is a critical period for China to comprehensively deepen reform.As a basic industry to protect people's livelihood,power supply and power security directly affect the economic and social development.On the one hand,the power industry is a major consumer of primary energy.In 2018,coal consumption for power generation accounted for about 50%of the national coal production.On the other hand,the power industry is also the creator of energy.In 2018,China's annual power generation was 6.8 trillion hours,a year-on-year increase of 6.8%,creating the highest growth rate since 2014.Among them,the annual power generation of thermal power units was about 4.98 trillion hours,accounting for 73%of the total power generation.But for a long time,"high energy consumption,low efficiency and heavy pollution" has been the label of thermal power projects.In the context of coal and coal power overcapacity,how to achieve energy conservation and loss reduction of thermal power projects,improve the comprehensive utilization efficiency of thermal power projects,reduce the emission of various kinds of gas pollutants,and promote the sustainable development of the power industry has become the focus of social attention.Based on the theory of life cycle,it is an effective way to realize energy saving and loss reduction,improve the comprehensive utilization efficiency of thermal power projects,and reduce the pollutant emissions of thermal power projects by comprehensively considering the planning,design,investment and construction,operation and maintenance,and disposal of scrap.Based on the above background,based on the theory of life cycle,this paper studies the optimization management of thermal power project energy saving based on the theory of life cycle.The research contents are as follows:(1)An optimal management model for energy saving and loss reduction of thermal power projects in the whole life cycle is established.The relationship between each stage of the whole life cycle of thermal power projects is clarified,and the characteristics of energy consumption and carbon emission of thermal power projects in the whole life cycle are put forward.The model of energy consumption and carbon emission in the whole life cycle is proposed,including the model of energy consumption and carbon emission in the planning and design stage,the model of energy consumption and carbon emission in the construction stage,the model of energy consumption and carbon emission in the operation and maintenance stage,the model of energy consumption and carbon emission in the scrapping and demolition stage.On this basis,an energy-saving optimization planning and management model for the whole life cycle of thermal power project is established based on the combination optimization of investment,energy consumption and pollutant emission cost.(2)The optimal management model of energy-saving replacement between thermal power projects in the whole life cycle is established.The basic idea and main characteristics of energy-saving replacement are discussed,and the main ways of energy-saving replacement between thermal power projects are put forward.In this paper,a multi-objective optimal management model of energy-saving replacement between thermal power projects in the whole life cycle is established,and an algorithm for solving the model is proposed.On this basis,the multi task agent theory is introduced to establish the optimal management model of energy-saving replacement among thermal power projects with multi task agent.(3)The optimization model of energy-saving replacement of thermal power projects and other types of power generation projects in the whole life cycle is established.The distribution of coal,water and wind energy resources in China is analyzed.The cost,energy efficiency and pollutant emission of thermal power project and hydropower project are compared and analyzed.Considering the whole life cycle of power generation project,the comprehensive performance evaluation model of thermal power project and hydropower project and the optimization model of energy-saving replacement of thermal power project and hydropower project are established respectively.The optimization model of energy-saving replacement of thermal power project and wind power project is established,and the fuzzy satisfaction theory and weighted multi-objective method are introduced to solve the above model.(4)The comprehensive benefits of energy-saving optimization management of thermal power projects in the whole life cycle are evaluated.The connotation and working principle of interpretative structural model are introduced,and the relationship between the comprehensive benefit indexes of the thermal power project in the whole life cycle is analyzed by using the interpretive structure model.The key indexes of comprehensive benefits of energy-saving and optimal management of thermal power projects are selected.On this basis,the comprehensive benefit evaluation index system of energy-saving optimization management of thermal power projects in the whole life cycle is established.The entropy weight and order relation method are used to design the weight of the comprehensive benefit index of the thermal power project energy-saving optimization management.By using TOPSIS method,the comprehensive benefits of energy-saving and optimization management of thermal power projects in the whole life cycle are evaluated,and an example is analyzed.