The Research On Capacity Allocation And Optimal Operation Of Microgrid Generation

In recent years,with the sustained and rapid development of national economy and industrialization,the contradiction between increasingly energy demand and increasingly exhausted energy supply is more and more obvious.In addition,a great quantity of fossil energy consumption will lead to a large number of greenhouse gases and pollutants emissions,and also bring serious environmental problems.The above phenomenon has aroused the high attention of governments all over the world.Thus,the microgrid containing a large amount of renewable energy came into being.Based on the research status of microgrid at home and abroad,this paper studies the optimal allocation and optimal operation of power supply in microgrid.The main research contents are summarized as:(1)The significance of optimal configuration and operation of power supply capacity for microgrid containing a large number of distributed clean energy is analyzed.And also the research status of capacity allocation and optimization operation of microgrid is summarized.The working principle and operating characteristics of the distributed power supply in the microgrid are studied and their respective mathematical models are built on this basis.(2)The capacity optimization method of distributed power supply in microgrid is studied.In view of the lack of unified standard for selecting the objective function of the optimized configuration of the microgrid,this thesis is based on the three indexes of economy,environmental protection and reliability as the basic optimization object.And the optimization target model of different combinations is established.The power capacity configuration of the microgrid under the different combination target model and the specific target combination under different strategies is simulated and verified.A model selection rule based on the compensation cost of power load and the cost of pollution compensation is given,and the optimal capacity allocation results are obtained,which provides reference for the power distribution of microgrid in practical engineering.(3)The method of optimal operation of microgrid based on the user’s electrical anxiety is proposed.First of all,it analyses and studies the different user load characteristics.The load is divided into four types:base line load,translation load,planned load and temperature control type load.And its linearization model is set up respectively.Then,the concept of user electrical anxiety,which includes the user’s electricity mode anxiety and the cost anxiety of the power consumption,is proposed.user electric anxiety model based on different load characteristics is established,and the microgrid optimized operation model based on the user’s electrical anxiety is built.And in view of the user’s participation in the optimized operation of the microgrid,the contract content of the interaction between the user and the microgrid is studied.The validity of the proposed model is verified by simulation analysis.The simulation results show that this method can provide an optimized operation scheme for the microgrid under the condition of full consideration of the user’s electrical anxiety,making the user’s habits of electricity consumption more practical.Alos it can provide data reference for better guiding users to participate in the demand side response.