| With the continuous increase in the grid-connected capacity of clean energy such as wind and light,the modern regional energy system is gradually transforming into a clean and low-carbon system.In the scenario of high proportion of renewable energy,a large number of flexible resources are required to serve the dynamics of the energy consumption system to meet the diversified energy supply and demand balance,and thereby eliminate the negative impact of wind and solar grid integration;On the other hand,as the energy supply supplement of the source network side,the load storage side flexible resources can ensure the safe and reliable operation of the system and improve the terminal power efficiency.Therefore,the consumption of renewable energy can be realized through the source network load storage side complementarity in the regional electric-heat energy system.This paper studies the participation of flexible resources in the coordinated operation of regional electric-heat energy system,mainly in the following aspects:Aiming at the load-side flexibility resources in the district electric-heat energy system,it is divided into active/passive resources according to the load response mechanism,and three types of load adjustment models that can be translated,transferred and can be reduced are constructed.On this basis,considering the characteristics of the actual industrial industry,an industrial load regulation mechanism with a differentiated layout is constructed,and a source-grid-storage model of the electric-heat system is established based on the electric-heat coupling of the urban energy grid.For the power system in the district electric-heat energy system,it is the core of realizing the functions of the electric-heat energy system as the source network load storage interactive carrier.Considering the synergy of active/passive types of flexible resources,different scenarios are divided according to the response capacity of various resources,and the effects of the regional power system in economic operation,wind and solar use,voltage stability,and peak cut are analyzed.In order to improve the solution efficiency and maintain the diversity of the solution set,an improved multi-objective particle swarm algorithm is used for calculation.Combined with an actual power grid in Northeast China,the simulation analysis is carried out to verify the rationality and effectiveness of the method used.For the electric-heat coupling network system in the district electric-heat energy system,the electro-thermal coupling link is added on the basis of the power system.Considering the controllable load and electric/thermal energy storage in the electric-heat coupled energy grid,a comprehensive benefit model is constructed with economic cost,wind and solar energy consumption and carbon emission as indicators.And a carbon emission flow topology is proposed to describe the carbon emission flow information attached to the energy flow.Finally,the IEEE33-node power grid and the 45-node heat grid coupled energy system are simulated to analyze the improvement effect of the multi-flexible resource response on the comprehensive benefit of the system,and the electric-heat carbon emission flow process in a typical scenario is visually displayed through topology.The results show that exploring flexible resources can improve the consumption margin of the regional integrated electric-heat energy system for wind and solar energy,which verifies the rationality and effectiveness of the proposed method. |
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