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Research On Energy Optimal Management And Coordinated Control Strategy Of Wind-storage DC Microgrid

Posted on:2021-01-06Degree:MasterType:Thesis
Country:ChinaCandidate:Q WangFull Text:PDF
GTID:2392330620471667Subject:Electronic and communication engineering
Abstract/Summary:PDF Full Text Request
In the face of the tense situation of energy and the increasing pressure of environmental pollution,renewable energy is the focus and research hotspot.Therefore,the control technology of renewable energy has also been developed rapidly and increasingly mature.but renewable energy also has a system problem.as photovoltaic and fan for distributed generation(Distributed Generation,DG),their biggest feature is variability,so their output power changes at all times.which affects the power supply quality of the power grid.Therefore,in order to improve the power supply quality of the whole system,distributed generation and energy storage and load are composed to form a microgrid with flexible control.And with the increase of the number of DC load in life,the DC microgrid in the microgrid has attracted people's attention in the form of its output DC.It does not need to consider the influence of frequency and phase,and the control structure is simple,which can realize long-distance transmission,so it improves the power quality of the system and reduces the system loss,so it has a considerable development advantage and becomes the development goal of the new generation.Based on the above reasons,the reliable operation of DC microgrid is the key goal of the system,and through the monitoring of its internal important indicators,it has become an indispensable link to ensure its stable operation and timely troubleshooting.consumption,so has a considerable development advantage,has become a new generation of development goals.Based on the above reasons,the reliable operation of DC microgrid is the key goal of the system,and through the monitoring of its internal important indicators,it has become an indispensable link to ensure its stable operation and timely troubleshooting.Based on the requirements of the development of the times,this paper takes the wind-storage DC microgrid as the research goal,first analyzes the background of the subject discussed in this paper,and then discusses the current research status of DC microgrid monitoring technology at home and abroad.Secondly,combined with the actual situation and load capacity,the capacity calculation and parameter design of wind turbine,energy storage system and each converter in microgrid are carried out.Thirdly,based on the basic idea of microgrid operation control,three operation modes under isolated island operation mode are discussed,and the corresponding control strategy is designed with these three operation modes,so as to achieve the purpose of voltage stability of DC microgrid bus.By simulation in Matlab/Simulink,the correctness and feasibility of the control strategy designed in this paper are verified.Finally,the upper computer monitoring system based on VB and Ethernet is established,and the real-time monitoring of theimportant parameters such as bus voltage,fan running state and battery working condition of the system is completed.
Keywords/Search Tags:distributed generation, wind storage DC microgrid, control stragety Ethernet, real-time monitoring
PDF Full Text Request
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