A two-stage Control Strategy to Control the Energy Storage Source for Robust Performance of Microgrid Against the Loss of the Upstream Network or the Load Variation

: this Report investigates a two-stage control strategy to control the energy storage source for robust performance of Microgrid against the loss of the upstream network or the load variation. A micro grid is a localized grouping of electricity generation energe storage and loads that normally connected to a main network micro grid generation resource can in clade some distributed generation utilities, wind turbines, photo volatic systems (PV) diesel generator and fuel cell which are the electricity supplies and heat provider. One of the most important problems of micro grid. Is voltage control and frequency, in other words, the balance between generated power and consumed load, 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 ther hand, ther can't use in the power blance, so in micro grids the rechovgeable and energy storage resources like battery and flywheel 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 energy storage system is introduced for voltage control and micro grid frequency in the isolated mode. In the first stage energy storage system provide primary voltage and frequency control, then controllable resources act the role of. power equilibrium in the micro grid. The aim of this processis that the energy saving system can fall down the output voltage and continuously the maximum 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. The control strategy is designed in a way that in the first stage, the energy storage system keeps the balance between the load and the power and prevents the frequency and voltage to deviate. Then gradually it will decrease the battery output power to zero and simultaneously increase the power of the controllable distributed generation sources to keep the maximum capacity of the storage source available. In this Report, a low voltage microgrid constructed by the Korea Electric power industry research center is picked as a test case. This microgrid is connected to ۲۲.۹ kV grid through ۱۰۰ kVA transformer. It includes photovoltaic, the combined system of wind turbine and photovoltaic, two diesel generator, battery energy storage and three loads.: this Report investigates a two-stage control strategy to control the energy storage source for robust performance of Microgrid against the loss of the upstream network or the load variation. A micro grid is a localized grouping of electricity generation energe storage and loads that normally connected to a main network micro grid generation resource can in clade some distributed generation utilities, wind turbines, photo volatic systems (PV) diesel generator and fuel cell which are the electricity supplies and heat provider. One of the most important problems of micro grid. Is voltage control and frequency, in other words, the balance between generated power and consumed load, 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 ther hand, ther can't use in the power blance, so in micro grids the rechovgeable and energy storage resources like battery and flywheel 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 energy storage system is introduced for voltage control and micro grid frequency in the isolated mode. In the first stage energy storage system provide primary voltage and frequency control, then controllable resources act the role of. power equilibrium in the micro grid. The aim of this processis that the energy saving system can fall down the output voltage and continuously the maximum 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. The control strategy is designed in a way that in the first stage, the energy storage system keeps the balance between the load and the power and prevents the frequency and voltage to deviate. Then gradually it will decrease the battery output power to zero and simultaneously increase the power of the controllable distributed generation sources to keep the maximum capacity of the storage source available. In this Report, a low voltage microgrid constructed by the Korea Electric power industry research center is picked as a test case. This microgrid is connected to ۲۲.۹ kV grid through ۱۰۰ kVA transformer. It includes photovoltaic, the combined system of wind turbine and photovoltaic, two diesel generator, battery energy storage and three loads.: this Report investigates a two-stage control strategy to control the energy storage source for robust performance of Microgrid against the loss of the upstream network or the load variation. A micro grid is a localized grouping of electricity generation energe storage and loads that normally connected to a main network micro grid generation resource can in clade some distributed generation utilities, wind turbines, photo volatic systems (PV) diesel generator and fuel cell which are the electricity supplies and heat provider. One of the most important problems of micro grid. Is voltage control and frequency, in other words, the balance between generated power and consumed load, 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 ther hand, ther can't use in the power blance, so in micro grids the rechovgeable and energy storage resources like battery and flywheel 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 energy storage system is introduced for voltage control and micro grid frequency in the isolated mode. In the first stage energy storage system provide primary voltage and frequency control, then controllable resources act the role of. power equilibrium in the micro grid. The aim of this processis that the energy saving system can fall down the output voltage and continuously the maximum 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. The control strategy is designed in a way that in the first stage, the energy storage system keeps the balance between the load and the power and prevents the frequency and voltage to deviate. Then gradually it will decrease the battery output power to zero and simultaneously increase the power of the controllable distributed generation sources to keep the maximum capacity of the storage source available. In this Report, a low voltage microgrid constructed by the Korea Electric power industry research center is picked as a test case. This microgrid is connected to ۲۲.۹ kV grid through ۱۰۰ kVA transformer. It includes photovoltaic, the combined system of wind turbine and photovoltaic, two diesel generator, battery energy storage and three loads.

کلیدواژه ها:

microgrid ، voltage and frequency control ، energy storage system ، power systems