Research On Microgrid Energy Management Strategy Considering Virtual Energy Storage And P2G

In recent years,energy utilization and treatment have gradually become regional and comprehensive.Under the background of energy shortage and serious environmental pollution,how to formulate efficient energy management strategies has become particularly important.Micro-grid is a terminal embodiment of regional energy comprehensive management.Residential micro-grid is a new type of micro-grid that integrates renewable energy power generation and energy storage systems in residential communities.The stable and safe operation of residential micro-grid requires the guidance of reasonable energy management strategies.The energy management strategies need to be formulated in combination with various factors such as the actual equipment and optimization objectives.With the update of internal equipment,more problems need to be studied.Therefore,it is of great significance to develop efficient energy management strategies in combination with new energy equipment to improve the efficiency of renewable energy and ensure the security of energy supply.The main research contents of this paper include:Firstly,the overall architecture of the residential micro-grid system is established,and the important energy units are modeled.Modeling the electrothermal equipment,cogeneration equipment and P2 G equipment in the energy conversion unit;Modeling the power storage,heat storage and gas storage equipment in the energy storage unit;Based on the thermal balance equation,the equivalent thermodynamic parameter model was established for the energy consumption unit,and the potential of heat storage was analyzed.According to the predicted average thermal sensation index,the adjustment margin of indoor temperature in residential buildings is calculated,which lays a theoretical foundation for the realization of virtual energy storage.Secondly,three types of residential micro-grid energy management models are established,which are electric heating,combined heat and power generation and thermoelectric coupling micro-grid.The air conditioning and floor in residential buildings are discussed as virtual energy storage units of the system,and the charge and discharge management of virtual energy storage is realized by changing the working conditions of electrical heating,gas turbine and other equipment.According to the residential micro-grid model of different structures and the actual situation setting of residential communities,the non-dominant sorting genetic algorithm with elite strategy(NSGA-II)was used to solve the problem,and the influence of different influencing factors on the scheduling results of residential micro-grid was compared and analyzed.Finally,through the micro-grid experiment platform,the optimized dispatching results of the electro-heating micro-grid are verified and analyzed.Based on the existing physical equipment and virtual simulation model in the laboratory,the semi-physical and semi-simulation comprehensive experimental system of the micro-grid was established,the experimental process was clarified,and the feasibility of the energy management strategy of the electrothermal micro-grid was analyzed.