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Research On Energy Coordinated Control And Energy Optimization Management Of Grid Connected Microgrid

Posted on:2020-03-17Degree:MasterType:Thesis
Country:ChinaCandidate:Y B ZhangFull Text:PDF
GTID:2392330575958205Subject:Control engineering
Abstract/Summary:PDF Full Text Request
Distributed new energy has the characteristics of wide range,less pollution,decentralization,flexible installation location,saving transmission resources,and gradually become the trend of future power system development.Microgrid is a carrier of distributed energy development.Especially the normal working mode of grid-connected microgrid is the connection of large power grid.Introducing large power grid into microgrid can be equivalent to increasing the system controllable factor.Coordination and optimization strategies among microgrids will become more abundant.In this context,the power coordination control strategy and energy optimization management scheduling of gridconnected micro-electricity are studied in this paper.Establish the power characteristic model of microgrid,and design different control strategies of microgrid according to the characteristics of its mathematical model.Aiming at the control emphasis of virtual impedance,an improved control method of virtual impedance is proposed to improve the accuracy of automatic reactive power allocation,so as to improve the stability of the system.According to the micro-source output in the microgrid,according to the objective function of economic operation,the energy optimization management model based on economic operation is constructed under the constraints of energy transmission,voltage,frequency and power.A microgrid example system with wind power,photovoltaic,fuel cell,micro gas turbine and storage battery connected to the public grid is constructed.Particle swarm optimization(PSO)algorithm is used to solve the power curve of economic optimal dispatching operation of microgrid,so as to maximize the benefits of microgrid system.The simulation results show the effectiveness and correctness of the system management model.The simulation platform is built through the actual gridconnected micro-grid project,and the simulation model of grid-connected micro-grid is built in the simulation software MATLAB/Simulink.An optimal dispatching method is proposed to optimize the distribution of energy reasonably,so as to guide the operation of the actual micro-grid.The subject of this paper originates from the summary and thinking of practical projects.It has certain significance to analyze and study the operation control and optimal dispatch of grid-connected micro-grid,and has reference and guidance for the implementation of the project.
Keywords/Search Tags:Grid-connected microgrid, coordinated control, energy optimization, particle swarm optimization, economic benefits
PDF Full Text Request
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