Research On Low-carbon Economic Dispatch Methods For Comprehensive Energy Systems In Agricultural Parks

In the context of promoting the "dual carbon" goal and accelerating the transformation of the power system in China,the comprehensive energy system is the key development direction of energy in China,and the park comprehensive energy system is one of the main forms of the comprehensive energy system.However,there are still issues with the comprehensive energy system in the park,such as high user energy costs,high carbon emissions,and low energy utilization efficiency.The comprehensive energy system of agricultural parks studied in this article has abundant biomass resources.By integrating multiple energy sources such as electricity,heat,and cold within the region,energy complementarity,coordination,optimization,and collaborative management among multiple energy systems can be achieved.Focusing on the low-carbon economic optimization of the integrated energy system,this paper focuses on the impact of stepped carbon trading,integrated demand response and air source heat pump efficiency on the system operation model.The specific research contents are as follows:(1)Based on the characteristics and current development status of the comprehensive energy system in the park,a structural model of the comprehensive energy system in the agricultural park is established.This paper analyzes the coupling relationship between energy supply equipment,energy conversion equipment,energy storage equipment and load in the comprehensive energy system of the agricultural park,introduces the operation principle of each equipment itself and carries out modeling,classifies the comprehensive demand response and carbon trading mechanism,and lays a foundation for the subsequent research on the optimal scheduling method of the comprehensive energy system of the park.(2)Propose a low-carbon economic dispatching method for the integrated energy system of agricultural parks taking into account the demand response ratio.Facing typical scenarios in northern China,aiming at the problems of high energy consumption cost,high carbon emissions and low utilization rate of distributed clean energy in the integrated energy system of agricultural parks,consider stepped carbon trading,integrated demand response and wind and light abandonment punishment mechanism,convert the system carbon emissions and wind and light abandonment into corresponding economic indicators,with the goal of optimizing the overall economy of the system,Constructing a low-carbon economic dispatch model for the comprehensive energy system of agricultural parks,setting up various typical scenarios,and using the CPLEX solver to solve the system model.The results show that the comprehensive consideration of stepped carbon trading and demand response can improve the economy and environmental protection of the system.Compared with the system without considering both,the overall operating cost is reduced by 8.7%,and the carbon emissions of the system are reduced by 22.1%;In the case of stepped compensation cost set in this paper,when the demand response ratio is 38%,the overall lowcarbon economic index of the system is the lowest.Compared with the scenario without demand response,the total cost of the system decreases by 9.4%,and the carbon emissions of the system decreases by 15.4%.(3)Construct an optimized scheduling model for the comprehensive energy system of agricultural parks that takes into account the Cost of Performance(COP)value of air source heat pump cooling and heating.In response to the inaccurate COP value of the hollow air source heat pump in the optimization and scheduling model of the comprehensive energy system in agricultural parks,which leads to insufficient heating and cooling output and increased operating costs of the system,considering the relationship between the actual operating conditions of the air source heat pump and the external environmental temperature,multiple scenarios were set up in the time and space dimensions of Shenyang and Handan regions,and the CPLEX solver was used to solve the system model.Through comparative analysis,it can be concluded that the winter heating systems in Handan and Shenyang operate with actual air source heat pump COP values,resulting in a cost increase of 5.2%and 13.8%,and a carbon emission increase of 4.5%and 7.8%,respectively;Summer heating operates at actual COP values,with costs increased by 4.5%and 3.5%respectively,and system carbon emissions increased by 4.4%and 3.2%.Verified the COP value of the actual operation of the air source heat pump through accurate calculation,which helps to improve the accuracy of the system scheduling model.