Research On Day-ahead Optimal Operation Of Integrated Energy System In Industrial Parks

At present,China is in a critical period of energy transformation and upgrading.The development of integrated energy system has opened up a new path for the deep reform of energy field.In recent years,a large number of integrated energy system demonstration parks have been built in industrial parks,which have solved the problems of energy shortage and energy waste caused by the low coupling degree of multi-energy flow in traditional industrial parks,and greatly improved the economic and environmental benefits of the energy system in industrial parks.However,many problems that need to be solved are gradually exposed in the operation of the completed integrated energy system.For example,the multi-energy coupling units,which play a major role in the integrated energy system,often operate under the condition of deviating from the standard environment,and the operation uncertainty of the integrated energy system caused by the deviation of the unit conversion efficiency becomes increasingly apparent.In addition,the overall operation cost of the integrated energy system that has been put into operation is relatively high,the consumption level of new energy units is greatly limited,and the low operating energy efficiency of each unit is also significant.Therefore,it is necessary to carry out further research on the day-ahead optimization operation of the industrial park level integrated energy system,so as to provide reference for the economical and efficient operation of the integrated energy system.This paper established the integrated energy system optimal operation model considering uncertainty of multi-energy coupling unit.Aiming at the lowest daily operation cost,on the basis of introducing artificial intelligence algorithm to ensure the prediction accuracy of wind and solar output and load,the mixed integer interval linear programming method is adopted.The optimization results are expressed in the form of interval values,which solves the system uncertainty caused by the operational efficiency deviation of multi-energy coupling units in the system.The results of the example show that the optimization model and method adopted in this study can optimize the uncertainty problem within a certain range and provide a reasonable reference space for the operation of the integrated energy system.At the same time,the influence of efficiency uncertainty of multi-energy coupling unit on system operation cost is also analyzed,and relevant economic indexes are further optimized and clarified.Then,considering the role of new energy units in the industrial park level integrated energy system,this paper proposes an optimized operation model of the integrated energy system considering new energy incentive mechanism,and adopts the mixed integer linear programming method to calculate and solve the problem,aiming at the lowest daily operating cost.Four typical scenarios of incentive mechanism were set up,and through simulation calculation,the effect of the established optimization model and incentive mechanism on the improvement of related operating indexes of the integrated energy system at the industrial park level was quantitatively analyzed.The results show that the proposed optimization model can further improve the output of new energy units and promote the power sale and transaction between the system and the external power grid.In addition,the optimization model further reduces the daily operating cost of the integrated energy system.The optimization model proposed in this paper can promote the development of industrial park-level integrated energy system.