Autonomous Operation Strategy Of Multi-source Microgrid With Hybrid Energy Storage Containing Electricity And Hydrogen

At present,China’s total thermal power generation accounts for more than70% of the national power generation,thermal power generation still occupies a dominant position.The large amount of carbon emissions and high pollutant emissions caused by coal-fired power generation,such as dust and sulfur dioxide,seriously threaten the natural environment and human health.Thermal power generation consumes a lot of non renewable energy,which is not in line with the current environmental protection policy.In actual production,commercial electricity leads to higher cost,and the common conventional energy storage battery has higher cost and more charging and discharging times,which leads to shorter service life and higher damage rate.In view of the above problems,this paper establishes a multi-objective operation model of hybrid energy storage microgrid,which includes a variety of distributed generation,such as photovoltaic power generation,wind power generation and micro gas turbine power generation.On this basis,this paper proposes an optimized autonomous operation strategy for power generation,power consumption and energy storage of the microgrid,so as to reduce pollution to the greatest extent,use more clean energy and reduce the cost of microgrid The operating cost and the cost of electricity consumption by users.In order to achieve the above purpose,the main research contents of this paper include:Firstly,the distributed generation in the microgrid is introduced and analyzed,and the corresponding mathematical model is established according to its characteristics,including photovoltaic cells,wind turbines and micro gas turbines.Secondly,the energy storage equipment in the microgrid is analyzed,including the characteristics and development status of electric hydrogen hybrid energy storage device,and the electric energy storage device composed of super capacitor and battery.The load side is classified and introduced,and the type is selected according to the actual application.Secondly,based on different types of energy storage,two types of microgrid are constructed,one is EHSS microgrid with electric hydrogen hybrid energy storage device as energy storage device of microgrid,and the other is tbes microgrid with electric energy storage device as energy storage device of microgrid.Planning and coordination are carried out from the aspects of distributed generation cost,energy storage cost,load electricity balance,thermal energy balance,energy interaction between microgrid and distribution network,economic cost of microgrid operation,etc.all indicators are constrained to improve the utilization efficiency of microgrid energy and the purpose of economic operation,and the energy management strategy model is constructed.Finally,taking a processing plant in a city of our province as an example,as the user of the microgrid,for two types of microgrid,MATLAB software is used to build simulation models,and a variety of new energy coordinated power generation microgrid with electric hydrogen storage system and electric energy storage system is established respectively for autonomous optimization.Based on the actual user data,the calculation example is analyzed to compare the impact of two kinds of microgrid on electric energy and thermal energy In order to achieve multi-objective coordinated operation,a microgrid mode which can make full use of electric energy on the basis of ensuring economy is obtained.