PI control method based storage to control the microgrid in a state separated from the main network

A micro grid is a localized grouping of electricity generation energe storage and loads that normally connected to a main network micro grid generation resources can in clade somedistributed generation utilities , wind turbines , photo volatic systems (PV) diesel generator and fuel cell which are theelectricity supplies and heat provider. One of the most important problems of micro grid. Is voltage control and freguney , in otherwords , the balance between generated power and consumedload, in the micro grid. In the network – connected modes the moin network or macro grid establishes the power equilibrium.Since the unreproducible resources used in micro grid such as fael cells and diesel generator act un satisfactory and in of therhand , ther cant use in the power blance , so in micro grids the rechovgeable and energy storage resources like battery andflywheel more often used. These resources have high velocity and areable to create power equilibrium as soon as possible. In the research a tow-stag control strategy based on battery energystorage system is introduced for voltage control and micro grid frequency in the isolated mode. In the first stage energy storagesystem provide primary voltage and frequency control, then controllable resources act the role of .power equilibrium in themicro grid. The aim of this processis that the energy saving system can fall down the output voltage and continuously themaximum capacity of energy saving would be available to stablish power equilibrium in the micro grid. The simulation results on micro grids prove the efficiency of controller.

کلیدواژه ها:

micro grid ، micro resources ، energy saving system ، voltage and frequency