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Optimal Configuration Of Integrated Multi-energy Microgrid System With Compressed Air Energy Storage

Posted on:2020-02-18Degree:MasterType:Thesis
Country:ChinaCandidate:Z L WangFull Text:PDF
GTID:2392330578968767Subject:Power system and its automation
Abstract/Summary:PDF Full Text Request
In recent years,the contradiction between economic development and fossil energy shortage has become increasingly prominent.The new energy sources such as scenery have become more and more important in the energy structure.The energy interconnection microgrid system has attracted wide attention from scholars because of the elimination of new energy sources and flexible control and management.The microgrid system can integrate multiple types of supply side energy and user side cold electric heating integrated energy demand,and flexible switching in grid-connected or island mode is the important grid structure in the future.The microgrid is generally close to the load side.In the user load concentration area,the microgrid presents the distribution characteristics of the regional microgrid group.Therefore,it is important to analyze the configuration capacity of the microgrid system and the impact of microgrid power on the microgrid.The paper first introduces the current status of energy interconnection microgrid system,and then establishes a model for energy production conversion devices such as cogeneration,indicating the coupling relationship between various types of energy;the mathematical characteristics of the triple-output characteristics of the non-combustion compressed air energy storage are described,which is compatible with the electric cooling and heat load requirements of the microgrid;The role of the electric vehicle in the configuration of the microgrid is considered,and the demand side response model of the user side is given.Then,the minimum annual total cost of the microgrid system is the performance evaluation index,and the maintenance cost,the demand side response cost,the energy consumption cost,and the installation cost are comprehensively considered.In order to analyze the demand side response and the compressed air energy storage,four scenariose are established,and the roles of them in the total cost optimization and equipment capacity allocation of the microgrid are analyzed.The influence is analyzed by the typical daily microgrid device output and the compressed air energy storage electric cooling triple output.Further consideration is given to the effects of compressed air storage turbine pressure and turbine temperature,demand side response ratio,and electric vehicle capacity in microgrid capacity configuration and various types of costs.Finally,the PV wind power output in different regions was obtained through the pvwatts data website and the Monte Carlo simulation.The C-means polymerization of the obtained output was used to obtain the typical seasonal output.With the goal of minimizing the total cost of the overall microgrid,the impact of the microgrid interconnection on the total cost of the microgrid system and the capacity allocation of the device is analyzed,compared with the non-interconnection microgrids.Through the single-micro network and the cross-micro network typical daily equipment output,the internal reasons for the cost changes of each type of micro-grid in the two scenarios are analyzed.The sensitivity of various types of equipment output and cost to natural gas price ratio and transmission cost ratio between micro nets in the microgrid are analyzed.
Keywords/Search Tags:energy interconnected microgrid, capacity configuration optimization, compressed air energy storage, power transmission between microgrids, heating and power loads
PDF Full Text Request
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