Modeling And Simulation Of Microgrid In The Islanding Mode

Today, with the increasingly shortage of non-renewable resources, because of theunique advantages, renewable sources such as wind power and solar energy haveattracted much attention. On account of the wind power and solar energy, the twoindependent power system, have their own imitations, but at the same time there is astrong complementarity between them, This paper chooses the micro-grid whichincludes wind power, photovoltaic power and thermal power supply system which hasstrong complementarity as the research object, through the research of the micro-grid,make this grid has a good application prospects.This paper firstly introduced the research background, the research status athome and abroad and the development of micro grid problems urgently needs to besolved; discussed the operation mode of micro grid and the main power grid, and putforward the detection method of islanding micro-grid. Analyzed the typical structureand composition of the micro-grid, simple introduced the distributed power, powerload and energy storage device.Secondly, in matlab/simulink, built simulation model of each distributed powerwhich micro-grid required, and debugged this model. On the basis of each simulationmodel has successful debugged, further constructed the micro-grid simulation model,in terms of interconnected and islanded two kinds of operation state,to debug thismicro-grid model.Again, simulated and validated this micro-grid. In the simulation and validationof the micro-grid, micro grid and the main power grid run at interconnected way atfirst. Before2s,this thesis set micro-grid and the main grid interconnectedrunning, and then analyzed the changes of voltage, frequency and power etc. of microgrid and the main grid at this state. After2s, the micro-grid into isolatedoperation state, and simulate the micro-grid at this state. Then analyzed the simulationgraphics of the micro-grid when it is running at interconnected and islanded state, and reasoned the conclusion.Finally, summarized this paper. This simulation model constructed the thesiscontained a fire generator, a wind turbines and a solar generator, but in practicalapplication there may be multiple consists of interaction power supply in a microgrid system. And there should consider the actual situation is more complex than thesystem mentioned this article, thus micro-grid remains to be further research.With the further realization of micro-grid and technology advancesof micro-grid, I believe that micro-grid will be widely used in future power system inthe near future.