Font Size: a A A

Research On Energy Management And Coordinated Control Of Microgrid System

Posted on:2016-02-12Degree:MasterType:Thesis
Country:ChinaCandidate:W H YuFull Text:PDF
GTID:2272330470483103Subject:Power electronics and electric drive
Abstract/Summary:PDF Full Text Request
Microgrid is an important form of distributed generation technology, more and more attention by the countries all over the world. Microgrid consists of photovoltaic, wind power and other renewable energy sources, energy storage battery, super capacitor and other energy storage devices, loading device, micro gas turbine and so on. Distributed generation units generally connect to the microgrid through power electronic converters, and the control of power electronic converters directly affects the performance of microgrid. Choosing the reasonable control strategy of microgrid system, coordinating the output of DGs, is the key problem in the study of microgrid.Firstly, this paper introduces three kinds of control modes of microgrid:peer-to-peer control mode, master-slave control mode, hierarchical control mode.Then introduces the control strategy of DG’s inverters. On this basis, combining the hierarchical control and peer-to-peer control theory, the microgrid control system is divided into 3 logical levels:coordination and optimization layer, Microgris central controller layer, equipment layer. Secondly, this paper discusses the main function of Microgrid Monitoring and Energy Management Software (EMMS) in the coordination and optimization layer in detail. The main functions include:human-computer interaction interface, data acquisition module, Coordinated control module and Energy management module. Human-computer interaction interface is convenient for the user to observe the running state of microgrid system; The data acquisition module uses TCP/IP communication protocol to gather the devices’ data, issue instructions and so on. Coordinated control module mainly realizes Secondary frequency/Voltage control strategy, and the smooth switching of off-grid and on-grid operation of microgrid, to ensure the stable operation of the system; Energy management module uses the particle swarm optimization algorithm, and realize the communication between the Kingview and matlab, in order to the use of matlab powerful programming ability to make up for the poor programming ability of KingView, through the data communication between matlab and KingView to complete the energy management function. Finally, build Microgrid system experimental platform including 4 energy storage inverters and 3 adjustable-load, to prove its main functions.
Keywords/Search Tags:Microgrid, hierarchical control, energy management, secondary frequency, Voltage control strategy, pre-synchronization
PDF Full Text Request
Related items