Research On The Dynamic Mechanism Of Carbon Price Of Micro Grid Enterprises Based On Government Subsidies

At present,all countries in the world are facing the pressure of energy structure adjustment and environmental protection.As an important form of renewable energy utilization,micro grid has been paid more and more attention in theory and industry.However,at this stage,micro grid is highly dependent on government subsidies,which brings heavy financial burden.At the same time,China’s carbon trading market is gradually developing.However,in the early stage of market development where trading system and policies and regulations are not perfect,the degree of micro grid participating in carbon trading market is relatively low.Then,whether micro grid enterprises can rely on the carbon trading market to gradually get rid of the subsidy dependence;whether the current low carbon price can steadily rise to provide reliable economic supplement for micro grid;and what measures can promote micro grid to participate in carbon trading,become the focus of this paper.Based on stakeholder theory,value compensation theory and externality theory,this paper uses game modeling,numerical analysis and other methods to explore the dynamic mechanism of micro grid carbon price based on subsidies.Firstly,this paper introduces the concept of micro grid,then points out that the subsidy gap of renewable energy industry is large and it is difficult to evaluate the amount of subsidy,then summarizes the types of carbon trading and the impact of economic compensation on micro grid.Then it defines the stakeholders who participate in carbon trading on the basis of government subsidies,and expounds the responsibilities and interests of stakeholders who participate in the game.After that,this paper focuses on the interest divergence and decision-making between the government and Microgrid through the stackbelberg differential game model;discusses the relationship between the carbon price and the supply of carbon emission trading rights of microgrid,the government subsidy payment,as well as the change trend of the three over time,price sensitivity coefficient and the cost coefficient of microgrid enterprises.The results show that:(1)the supply increases with the increase of carbon price,and the subsidy decreases accordingly;this conforms to the general economic law that supply follows the increase of price,and also confirms the substitution effect of carbon trade on subsidy from the static point of view.(2)Carbon price and supply increase with time,while subsidies decrease with time,which supports the above conclusion from a dynamic perspective.(3)The change of carbon price sensitivity coefficient leads to the decrease of demand,and the increase of cost coefficient leads to the decrease of supply.In both cases,the carbon price will decrease,so the government has to increase subsidies to support the development of micro grid.According to the research conclusion,this paper puts forward policy suggestions for the two main players in the game:(1)when the carbon emission reduction capacity of micro grid becomes weak,the carbon price will be reduced and the revenue will be reduced,so the government has to increase subsidies to maintain the development of micro grid.Therefore,it is suggested that micro grid enterprises strengthen the research and development of low-carbon technology to reduce the cost of micro grid development.(2)The sensitivity of carbon price will affect the supply of carbon price and carbon emission trading rights,and then affect government subsidies.Therefore,it is suggested that the government should reduce the entry threshold of emission control units,expand the industry and quantity of carbon trading market,and provide more liquidity for carbon market trading.Through Stackelberg differential game,we can get the trend of carbon price,subsidy and supply over time,and the influence of two exogenous variables on carbon price and subsidy.Based on this,we put forward some policy suggestions,such as enhancing the research and development of carbon emission reduction technology,reducing the threshold of carbon trading range,enriching the types of carbon financial products to supplement the liquidity of carbon trading,etc.,so as to establish an effective carbon trading price mechanism for relevant government departments,Looking for measures to promote the development of carbon trading market,creating a fair and just competition environment,and promoting the healthy development of micro grid industry to provide reference ideas,has a certain practical significance.