Coal Inventory Optimization Of Thermal Power Enterprises Based On Coal Price Change

With the deepening of power system reform,the power market competition is becoming more and more fierce.Power generation enterprises are facing the choice of survival of the fittest.Power generation enterprises should not only provide power products safely,stably and efficiently to meet the power demand of people's production and life,but also reduce production costs,improve enterprise economic benefits and enhance enterprise competitiveness.In the total cost of power generation enterprises,coal procurement cost accounts for the main part.Coal inventory can not only ensure the safe production of enterprises and prevent unstable factors,but also occupy a large amount of procurement funds of enterprises and cause cash flow tension of enterprises.The capital backlog and inventory cost increase caused by unreasonable coal inventory bring excess cost burden to power generation enterprises and seriously reduce the cost Reduce the profit creation of enterprises.Therefore,the key to control the cost and improve the efficiency of power generation enterprises is to control the coal inventory scientifically and reasonably.As the main raw material of power generation enterprises,the rise and fall of coal price is directly related to the production efficiency of power generation enterprises.Because the coal price is affected by a variety of complex factors,in a long period of time,the fluctuation is very frequent,and the fluctuation range is large.The characteristics of coal price change bring transaction risk and profit space to power generation enterprises.If power generation enterprises can reasonably grasp the trend of coal price fluctuation,they can not only gain advantages in the purchase price It is also helpful for power generation enterprises to formulate the optimal purchasing strategy and minimize the inventory cost.Therefore,scientific prediction of coal price can make power generation enterprises make the optimal inventory purchase at the right time and price,so as to reduce the inventory cost and improve the income of power generation enterprises.In view of the above background,this paper analyzes the current situation of inventory management of power generation enterprises from the domestic and foreign power generation enterprise inventory management theory and inventory model based on price change.Through the study of inventory procurement process and inventory cost,it is considered that there are many problems in the current inventory management of power generation enterprises,including the power generation enterprises can not accurately grasp the trend of coal price and face the price change In view of the problem,this paper first constructs a coal price prediction model,grasps the trend of coal price through reasonable prediction of coal price,on this basis,establishes a coal inventory control model of power generation enterprises based on price change,and fully considers the change of coal price under the goal of minimizing the total conversion cost of long-term expected inventory Then,the HJB equation corresponding to the model is established by using the optimal control principle of dynamic programming,and the equation is solved by the finite difference method.Combined with the actual data of power generation enterprises,the whole operation process of the model is simulated.The results show that the quantitative relationship between price and inventory is obtained under the premise of minimizing the total inventory cost,and the implemented inventory strategy meets the actual situation To meet the effectiveness and rationalityThis study establishes an inventory control model to control the price and quantity of coal.By purchasing different quantities of coal under different prices,the inventory control is realized.The inventory strategy is implemented according to the solved inventory boundary.When the quantity of coal under a certain price is lower than the inventory boundary,the inventory purchase is carried out.When the actual quantity of coal exceeds the inventory boundary,the inventory is stopped Stop purchasing,keep different inventory levels according to different coal prices,so as to achieve the control goal of optimal inventory with minimum inventory cost,so as to grab more profits for power generation enterprises in the changing coal price market.