| As users' demands for diversified forms of energy grow,Energy Hub,an integrated energy system that integrates cold,heat,power,and coupling new energy sources such as photovoltaics and wind power,has gradually emerged.On the one hand,the Energy Hub can break the traditional "source-grid-load-storage" boundary,realize the cross-conversion of various energy sources in different forms,which can reach the technical index of high energy utilization rate and maximum regional economic benefits;on the other hand,through the spatiotemporal coupling of cold,heat,and power and the complementarity of energy demand,the comprehensive energy demand of the user is solved,Producing,transmitting,transforming,and supplying cold,heat,and power in one system;At the same time,the cross-complementation of various energy sources and the flexible and reliable characteristics of thermal power units can efficiently absorb new energy sources such as photovoltaic and wind power with high volatility.Current Energy Hub research still requires in-depth exploration for uncertain elastic load modeling and multi-region integrated energy system planning and optimized operation strategies after planning and configuration.This article first focuses on the internal equipment classification modeling of Energy Hub,and models independent equipment such as electric energy storage equipment and thermal energy storage equipment.In the same way,it constructs coupled equipment such as thermoelectric units,refrigerators,and heat pumps that convert unidirectional energy flow in one direction.Combining various equipment models,an elastic load model based on indoor human temperature comfort;secondly,aiming at the study of energy hub planning based on comprehensive residential,commercial,office and other factors,an electric power interaction model was established to realize the coordinated planning and configuration of multi-regional energy hubs in the state of electrical coupling.;laying regional ring networks and pipeline heat networks to allow electric and thermal power to interact between regions,establishing a coupled heat network model,and realizing optimal operation of multi-regional Energy Hubs in the state of thermal power exchange for spring,autumn,summer and winter typical days.Finally,the case 1 of elastic load demand on the client side,the case 2 of multi-region electric coupling collaborative planning,and the multi-region electric and thermal coupling typical daily optimization operation case 3 were used to verify the optimization effect of the method in this paper.By linearizing the model,a 0-1 mixed-integer linear programming model is established for simulation analysis using the MATLAB+CPLEX platform.Based on the time-of-use electricity price,for Energy Hub planning in different scenarios,explore the impact of different electricity prices,gas prices,and thermal-electricity ratio sensitivities on energy hub planning results;the coordinated planning method under the multi-regional Energy Hubs electrical coupling mode has better economic benefits,and can save more than 10%of the total annual cost compared with the regional independent planning method;The typical daily operation in the thermal coupling mode is more economical.When factors such as thermal load fluctuations or unit failures cause thermal load-related equipment to reduce load operation,the use of pipeline heat networks to achieve thermal power interaction has better electrical and thermal load stability. |
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