Research On Micro Grid Energy Management Strategy Based On Virtual Energy Storage

Micro-grid,as a kind of small power grid abstsystem integrating distributed power supply,energy storage equipment and load,improves the reliability of load,realizes the unified management of power supply and load,and has very flexible characteristics,and has become an important part of smart grid.Micro grid energy management system is the control core of the entire micro grid.Reasonable energy management strategy micro grid system operates safely and stably.At present,the research and development of energy management strategies of micro grid are not mature,and there are still many problems to be studied.The main research contents of this paper include:Firstly,the operation characteristics of wind turbine,photovoltaic cell,micro gas turbine,battery and ultracapacitor are analyzed.Then in view of the low temperature floor radiant heating/cooling of residential buildings,analyses the basic dynamic process,set the low-temperature radiant floor equivalent thermodynamic parameters of the model,heat transfer model is established based on heat balance equation,and the different types of floor and palisade structure consisting of low temperature floor radiant heating/cooling system are simulated and analyzed its regenerative potential.Then the structure and energy management model of residential micro-grid system are analyzed.Taking the low-temperature radiant floor in the residential building as the virtual energy storage unit to discuss and analyze,three different types of residential micro-grid structures of cold,heat and power co-supply are constructed.On the basis of a conventional electric energy storage,DianZhuan gas contained technology and virtual storage hybrid energy storage type residential micro grid energy management strategy research,by the comfort temperature within the range of residential function temperature regulation,to participate in the virtual storage system optimization control to realize the charge and discharge of virtual storage management,thereby reducing network operation cost.Some analysis examples of energy optimization of a typical residential microgrid.A village in the north of the house of the winter heating scenario as an example,according to three different structures of micro grid,compared the introduction of virtual storageand without introducing virtual storage scheduling results,analysis of the micro grid virtual storage characteristic of the structures of three kinds of relationship with the electricity price,analyzes the different heat storage capacity of low temperature radiant floor,the palisade structure of the different material and the structure of micro power grid scheduling results and the influence of gas prices on influence of grid scheduling results were analyzed and discussed.