Search results for "Distributed generator"

showing 5 items of 5 documents

A Virtual Tool for Load Flow Analysis in a Micro-Grid

2020

This paper proposes a virtual tool for load flow analysis in energy distribution systems of micro-grids. The solution is based on a low-cost measurement architecture, which entails low-voltage power measurements in each secondary substation and a voltage measurement at the beginning of the medium voltage (MV) feeder. The proposed virtual tool periodically queries these instruments to acquire the measurements. Then, it implements a backward&ndash

Control and OptimizationComputer scienceEnergy Engineering and Power Technologylcsh:TechnologyElectric power systemDistributed generatorPower-flow studyElectrical and Electronic Engineeringsmart gridEngineering (miscellaneous)Simulationdistributed generationRenewable Energy Sustainability and the Environmentbusiness.industrylcsh:TMicro gridPower (physics)Smart gridpower systemFlow (mathematics)Distributed generationload flowNode (circuits)micro-gridmeasurement uncertaintiesbusinessSettore ING-INF/07 - Misure Elettriche E ElettronicheEnergy (miscellaneous)Voltage
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Electrostatic synchronous generator model of an Inverter-Based Distributed Generators

2015

In this paper, the idea of modelling the Inverter-Based Distributed Generators by using the concept of Electrostatic synchronous machines is discussed. A mathematical model of the inverter has been established which depends on the dc bus voltage, modulation index and frequency of the system. Two mathematical models have been developed: a small signal model and a steady-state model. These mathematical models will be helpful in studying the stability of a microgrid; especially when studying the transient stability performance of on-grid operation of converter-based distributed generator with multi-machine microgrid. Simulation results using Matlab/Simulink are carried out.

EngineeringMathematical modelMicrogridbusiness.industryRenewable Energy Sustainability and the EnvironmentModulation indexEnergy Engineering and Power TechnologyPermanent magnet synchronous generatorDistributed GeneratorSmall-signal modelStability of microgridSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaComputer Science::Hardware ArchitectureElectrostatic Synchronous MachineElectronic engineeringInverterMicrogridTransient (oscillation)businessMATLABcomputercomputer.programming_language
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Mathematical modelling of an inverter-based distributed generator

2016

In this paper, a modeling approach of a three phase power inverter based on an electrostatic synchronous machine is presented. By the proposed approach, any inverter-based distributed generator in a microgrid can be replaced by an equivalent electrostatic machine. This paper aims to promote the use of the proposed modeling approach in the analysis of microgrid stability. Thanks to the proposed modeling approach, transient performances of on-grid operation of converter-based distributed generators could be easily analyzed by multi-machine models. Parameters of the equivalent synchronous electrostatic machine model are derived to achieve equivalence with the inverter model. Small signal model…

EngineeringMicrogridbusiness.industry020209 energy02 engineering and technologyDistributed GeneratorVoltage Source InverterStability of microgridSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaElectrostatic Synchronous MachineThree-phaseControl theoryElectrostatic generator0202 electrical engineering electronic engineering information engineeringElectronic engineeringInverterElectric powerMicrogridbusinessSynchronous motorPulse-width modulationReference frame
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INVERTER-BASED DISTRIBUTED GENERATORS, MODELING AND CONTROL

In the last few years, electrical power generation is moving from a centralized generation towards distributed generation including on-site Renewable Energy Sources (RESs). In order to overcome RES related issues, as intermittent and fluctuating power, storage elements are included in the on-site generation system. The interaction between distributed generator (DG) units including RES, storage and front-end power converters should be carefully modeled in order to analyze the power system stability. An accurate modeling of DGs is required. In this thesis, a new modeling approach has been proposed for the inverter-based DGs based on the concept of electrostatic synchronous machines. Detailed …

Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaKeywords: Distributed Generators Voltage Source Inverters Electrostatic Synchronous Machines Microgrids Islanded microgrids nonlinear droop control minimum losses operation Optimal Power Flow.Distributed Generators Voltage Source Inverters Electrostatic Synchronous Machines Microgrids Islanded microgrids nonlinear droop control minimum losses operation Optimal Power Flow. [Keywords]
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Assessment of the production costs curve in micro-grids: a comparative analysis

2012

In micro-grids, due to their small scale, there is commonly only one power supplier. A competitive wholesale market hardly exists so the question about how to consider market issues for small producers within micro-grids arises. On the other hand, the specific features of micro-grids where load and generated power hardly find a balance, require that customers take part to regulation issues, maybe using demand response programs. In this paper, price responsive policies and its programs are discussed to answer this question. A case study of a micro-grid with one microturbine and two photovoltaic generators in Italy is analyzed to assess the overall production cost in order to build a price re…

micro-grid production costs price responsive demand response DSO time based program distributed generator electricity supply curveSettore ING-IND/33 - Sistemi Elettrici Per L'Energia
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