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The Analysis And Verification Of Microgrid Inverter Control Based On Virtual Synchronous Generator Princilpe

Posted on:2014-03-28Degree:MasterType:Thesis
Country:ChinaCandidate:X M ZhengFull Text:PDF
GTID:2252330392964553Subject:Motor and electrical appliances
Abstract/Summary:PDF Full Text Request
With the wide application of distributed generation technology,the large amounts ofdispersed DG systems bring influences on the grid security and reliability.Microgrid wasput forward.The research background,concept,domestic and overseas developments of microgridare introduced first in this paper, the microgrid operation requirements.Then some maincontolling methods at present are discussed,such as PQ control,Drooop control and V/Fcontrol are introduced,on account of the three ways,the the master-slave operation andpeer-to-peer operation are introduced.Based on the traditional control methods advantagesand disadvantages,a new method, which is based on the idea of virtual synchronousgenerator model is established,which focus on the power/frequency controller andexcitation controller designs.MATLAB simulation results show that the established virtualsynchronous generator can simulate the actual output characteristics of synchcronousgenerator, have a good steady-state and dynamic-state regulation performance, then caneasily adapt to microgrid operation requirements.A virtual micro-source synchronousgenerator,consisting of main circuit and control system,is designed finally,in which theDSP TMS320F2812chip is used as the main controller.The control framework ofmicro-source are designed.The control program was compiled in the CCStudio v3.3environment,on3KW three-phase inverter platform make experiments on open loop,singlecurrent colsed loop,voltage and current closed loop,charateristics of Virtual synchronousgenerator inverter.The effectiveness and preciseness of the strategy is proved.
Keywords/Search Tags:Distributed generation, Micro-grid, inverter, Virtual synchronous generatorinverter, Power/frequency Controller, Excitation Controller
PDF Full Text Request
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