Research On Coordinated Trading Of Electricity And Carbon Under Source-Grid-Load-Storage

In the context of dual carbon,to achieve high-quality development of the power system,coordination of the carbon market is an essential part,which is also an inevitable choice to effectively improve the level of new energy consumption and the proportion of non-fossil energy consumption.The coordinated trading of electricity and carbon means that the common participants of the two markets trade in the electricity market and the carbon market respectively,and the trading results of the electricity market and the carbon market influence each other through the trading behaviors of the market participants,showing a certain degree of coordinated characteristics.As a common subject of both the power market and the carbon market,thermal power plant vendors have an important influence on the trading results of both markets through their trading volume and price.The joint participation of thermal power,new energy and energy storage in the power market can not only improve the utilization rate of new energy,but also reduce the operation cost,which effectively realizes the win-win effect of cooperation among the three parties in the power market.Therefore,this paper builds a multi-objective optimization model for the participation of source,network,load and storage in the electricity market and carbon market based on the background of the participation of multiple new subjects such as source,network,load and storage in the electricity and carbon coordinated trading.Firstly,we analyze the trading mechanism of electricity market and carbon market,including the trading method,trading cycle and trading type,and give the definition of electricity-carbon coordinated trading,analyze the underlying structure and price transmission of electricity-carbon coordinated trading mechanism,and study the trading policy.And the way of participation of various subjects in the article is set.Secondly,according to the classification of trading entities,how the source,network,load and storage entities participate in the electricity carbon coordination is discussed,divided into the source side and the network,load and storage side.The source side includes thermal power and new energy,and introduces the cost of thermal power participation in the electricity and carbon market and the mode of new energy participation in the electricity and carbon market;the network side describes the responsibilities of the grid side and how the grid participates in the electricity and carbon coordination;the load side considers the different responses of different user sides to the price transmission in the electricity and carbon market;the storage side lists the types and characteristics of energy storage and discusses how storage can participate in the The types and characteristics of energy storage are listed,and how energy storage can participate in power trading is discussed.The types and characteristics of energy storage are listed,and the participation of energy storage in electricity trading is discussed.Thermal power units,photovoltaic and energy storage are selected as the main subjects of electricity and carbon coordination trading for the subsequent study.Then,a multi-objective optimization model of source-grid-load-storage participation in electricity-carbon coordinated trading is established with two objectives of minimizing annual electricity cost and minimizing carbon emission.Meanwhile,considering that the current carbon market price is too low and the price of carbon allowance does not match with the actual value,this paper innovatively considers the differentiated allowance price and sets different allowance prices according to different carbon emission.Firstly,the impact of different heat supply ratios on the amount of allowances allocated is explored,and then the cost of thermal power allowance kWh under single allowance price and differentiated allowance price is compared,and the increased cost of allowance kWh for thermal power units of different power under different annual utilization hours is derived.The corresponding constraints at the physical and value levels are also listed.The multi-objective optimization model is then solved using the ε-constraint method.Finally,reasonable values for thermal units,centralized PV and energy storage are set and simulated according to the actual situation.It is verified that when thermal power,centralized PV and energy storage participate in the trading together,it is more economical for the source-grid-load-storage to participate in the electricity-carbon coordinated trading than thermal power alone.The cost per kWh for different carbon emission constraints is also obtained according to the ε-constraint method,which provides a reference for the generation decision of thermal power plant operators when the allocation of allowances is tightened in the future.