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Research On Economic Optimal Dispatch Of Microgrid Considering Renewable Energy Output And Demand Side Response

Posted on:2021-05-30Degree:MasterType:Thesis
Country:ChinaCandidate:X H ZhouFull Text:PDF
GTID:2392330614463627Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
Traditional energy pollution is serious and depleting.Renewable energy is receiving more and more attention because of its cleanliness and renewableness.However,when renewable energy generation is connected to the microgrid as a distributed power source,many difficulties are faced.For example,the uncertainty of renewable energy output threatens the security of the microgrid,and the imbalance between supply and demand causes difficulties in the consumption of renewable energy.At present,the level of intelligence in our country is constantly improving,and the technologies,such as energy,combined heat and power,and energy storage,are becoming more and more closely connected.The unified operation of combined heat and power systems has become an inevitable trend of development.The research content of the paper is as follows:First,from the perspective of renewable energy output and demand-side response,this article considers the uncertainty of renewable energy output in microgrids and price-type demand-side response economic optimal dispatching.It interacts with large grids to realize microgrids optimized configuration.Secondly,under the environment of microgrid grid-connected operation,an optimization model that takes into account the uncertainty of renewable energy output is established,including renewable energy generation models and energy storage charging and discharging models.According to the established model,equivalence constraints and related constraints are given.The robust optimization method is used to deal with the uncertainty of the renewable energy output,and the uncertainty budget is introduced to convert the model with uncertainty into a model that does not contain uncertainty.Finally,the particle swarm optimization algorithm(PSO)was used to solve the model,and the validity of the model established was verified.Finally,on the basis of the above research,in order to improve the renewable energy consumption rate,an economic dispatching model of microgrid with combined heat and power units and demand side response was established.Introduce price-type demand-side response,use electricity prices to guide users to use electricity,and optimize load output curves.However,the traditional combined heat and power unit has the constraint of thermal power generation.In order to solve this problem,a heat storage device is added.The model still aims at the optimal operating cost of the microgrid,and comprehensively considers the power generation costs of conventional generating units and combined heat and power systems.At the same time,the large grid,as a powerful pillar of the microgrid,can interact with the microgrid in real time It also considers the cost of interacting with large power grids and considers constraints such as equivalence constraints.The simulation results under different operating modes are compared and analyzed to verify the validity of the established model,and to realize the economic optimal dispatch of the microgrid.
Keywords/Search Tags:Microgrid, Renewable energy, demand side response, Robust optimization, Particle swarm optimization algorithm, Economically optimized scheduling
PDF Full Text Request
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