| In recent years,with the transformation and transformation of the energy industry,the traditional single energy system has gradually developed into a multi-energy coupling integrated energy system.With the gradual deepening of the coupling degree of various subsystems and the development of various energy conversion technologies,it provides a development approach to realize the efficient utilization of energy.On the other hand,the existing environmental problems also make the development of the energy industry is facing great pressure.In addition to using clean energy as much as possible,we should also consider to reduce the impact of the development of the energy industry on the environment as much as possible from the perspective of emission reduction based on the current situation of energy use.In addition,due to the complementary nature of comprehensive energy,there are more possibilities for the implementation of demand-side response and more active and flexible participation in the scheduling and operation of the system,which provides a good means of regulation and control for the safe,economic and stable operation of the system.Based on the above background,this paper takes the electricity-gas integrated energy system as the research object and studies the optimal scheduling problem of the integrated energy system,which takes carbon capture,power-to-gas and user-side integrated demand response into consideration and takes into account the user’s energy experience.The main contents are as follows:(1)The network model of each subsystem,the mathematical model of coupling equipment and the power flow calculation method of the whole system under the environment of integrated energy system are studied.First,analyzed the pluripotent coupling,flexible,and controllable integrated electricity-natural gas system infrastructure,and then the whole integrated electricity-natural gas system contains trend of power system model,and the trend of gas network model was modeled and mainly analyzed the action principle of the coupling device of two systems and modeling of relevant components,which are mainly composed of power to gas,analyzes the principle and the main application in integrated electricity-natural gas system power to gas.Finally,the current main power flow solution methods of integrated electricity-natural gas system are summarized and analyzed.According to the characteristics of the coupling model considered in this paper,the sequential solution method is adopted to solve the energy flow of integrated electricity-natural gas system.(2)A combined operation mode of carbon capture system coupled with electricity to gas by carbon storage equipment is proposed,and a low carbon economic scheduling model based on this mode is established.First of all,given the current system for carbon capture and power to gas research,have run separately,without considering the correlation between them,and power to gas both carbon capture system are analyzed at runtime technology and raw materials,by adding carbon storage equipment,among both a carbon storage device coupled to carbon capture system and the power to gas joint operation mode,joint operation mode well solved both at run time on the problem of unequal,guarantee the power to gas start there is sufficient carbon source to synthesize methane;Then,on the basis of this operation mode,a low carbon economic dispatching model of electricity-gas integrated energy system considering the combined operation of carbon capture system and power to gas is constructed.Example shows that the introduction of joint operation mode,relative to the individual consider introducing carbon capture or power to gas,carbon storage equipment for the hub to connect carbon capture plants and power to gas joint operation mode in the new energy given,to reduce the carbon emissions of the system of the role of more obvious,and for the performance of carbon capture and power to gas ascension has significant effect.(3)A low carbon economic scheduling model for electricity-gas integrated energy system considering comprehensive demand response and user satisfaction was established.Firstly,the load characteristics of electricity and gas loads are analyzed respectively.Under the time-sharing energy price mechanism,two kinds of demand response strategies,horizontal and vertical,are formulated according to the adjustment mode of loads on the time axis and the relationship between energy types,and mathematical modeling is carried out.Second,for both the user’s experience and analysis of energy suppliers and cost-benefit relationship between users and improving the two representation can user satisfaction index,and use it as a model for the scheduling of constraint conditions,is established considering the comprehensive demand response and user satisfaction and electricity-gas integrated energy system low carbon economic scheduling model.Analysis,finally,a numerical example results under time-sharing energy price mechanism,the introduction of comprehensive demand response can obviously reduce the running cost of the system,reduces the load fluctuation,relative to the longitudinal demand response,bring down the load fluctuation effect more obvious lateral demand response,at the same time,comprehensive demand response has also raised the level system of carbon capture and power to gas utilization.Compared with the satisfaction of energy use expense,the satisfaction of energy use method has a greater impact on the cost of the system.The system operation cost increases with the improvement of the satisfaction level of energy use method,but the growth trend is not the same. |
