Optimal Scheduling Of Integrated Energy System Considering Hydrothermal Carbonization Of Waste

With the high-speed development of society and economy,the demand for energy in human society is increasing day by day,while the traditional energy system has the disadvantages of single energy supply and insufficient efficiency.The integrated energy system that contains various energy conversion can significantly improve the energy utilization rate to solve the problem.At the same time,the phenomenon of cities besieged by garbage is becoming increasingly serious,and the reduction and recycling of waste is very urgent.And the hydrothermal carbonization technology can convert biomass into hydrochar with high calorific value under subcritical conditions.Its environmental friendliness has attracted widespread attention in the conversion of biomass resources,which is in line with the demand for user-side waste reduction in the integrated energy system.Therefore,this article mainly studies the optimal scheduling of integrated energy systems that considering hydrothermal carbonization of waste,aiming at improving the economy and low-carbon performance of system operation.The main research contents of this paper are as follows:Firstly,in order to combine hydrothermal carbonization with integrated energy system,establish a hydrothermal carbonization model of wet waste at normal or valley time of electricity price,and establish an incineration treatment model by adjusting the combustion ratio of dry waste and hydrochar at peak time of electricity price.Then,a bi-level optimal allocation model is established on the basis of the uncertainties of wind,solar and load.The upper layer configures the equipment capacity with the goal of minimizing the annual total cost;the lower layer takes the minimum daily total operation cost of the system as the objective function to optimize scheduling.In view of the nonlinearity of the proposed bi-level optimal allocation model,the beluga whale optimization algorithm and two-stage robust optimization method are adopted to solve it.The simulation results show that the proposed model has more advantages in resource utilization,peak cutting and valley filling,and robustness compared with the anaerobic fermentation of waste.Further,to explore the impact of user side response on the optimal scheduling of integrated energy system considering hydrothermal carbonization of waste,and to mobilize the enthusiasm of system carbon emission reduction,consider the user side comprehensive demand response and reward and punishment ladder type carbon trading scheme.Taking the minimum total operating cost as the objective function.In addition to the demand response compensation cost and carbon trading cost,wind abandonment penalty cost was also considered to explore the wind abandonment absorption capacity of waste hydrothermal carbonization.In view of the nonlinear characteristics of carbon trading cost in the model,it is linearized by the technique of piecewise function linearization and solved by the CPLEX.The simulation results show that,compared with waste incineration,the proposed model has the utility of peak cutting and valley filling and the potential of absorbing renewable energy,which can effectively reduce operating costs and carbon emissions.