Font Size: a A A

Research On The Modeling And Implementation Of Inverter In Microgrid

Posted on:2011-12-14Degree:MasterType:Thesis
Country:ChinaCandidate:D ZhuFull Text:PDF
GTID:2132360308473584Subject:Power electronics and electric drive
Abstract/Summary:PDF Full Text Request
Microgrid is a relatively concept refering to the traditional grid,that is many distributed generations and its loads constitute in certain toplogical as a whole,it connects with the grid through static switch.Each form of distributed generation needs the face of power electronic devices to connect with the grid,the storage devices and the loads.So finding a inverter topology and control stategies suitable for Mircrogrid is one of the key technologies to develop Microgrid.In this paper,it is discussed from the aspects such as the operation requirements in Microgrid,the operation mode and control methods in power system,how to realize the idea of making the inverter imitate the output characteristics of the synchronous generator,then the system control strategies are fully explained.Not only the modeling and simulation of the proposed control strategies are gived ,also a set of experimental iverter is designed.The main task is as follows:1.A detailed analysis of the Microgrid structure, the operation characteristics of Microgrid, the relationship of Microgrid and the grid are described, summing up the inverter operation requirements in Microgrid, a brief statement of the existing parallel inverter control methods and the technology of the distributed generation to connect with the grid is given.Then proposing the brief graph of the inverter suitable for microgrid.2.Analyzing the topology of the single-phase inverter,go deep into the key points why the traditional power system can operate so stablely,proposing virtual synchronous generator algorithm.The frequency and voltage controllers are designed according to the actiyator and the excitation system.3.Basing on the proposed virtual synchronous generator algorithm and the controllers,the simulation model is established,all simulation results validate that the inverter can represents the characteristics of the synchronous generator.4.The exeperimental inverter to imitate the synchronous generator is designed, the system uses dedicated motor control DSP digital signal processor, the control flow charts are given for each module, all these ensure that the system can operate effectively.
Keywords/Search Tags:Microgrid, Inverter, Virtual Synchronous Generator Algorith, Frequency Controller, Voltage Controller
PDF Full Text Request
Related items