0000000000187800

AUTHOR

Hakam Shehadeh

showing 3 related works from this author

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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Nonlinear droop control for minimum power losses operation in islanded microgrids

2017

In this work, a modified primary regulation technique is proposed to control one of the inverter interfaced units feeding an islanded microgrid. The proposed approach employs an off-line minimum losses Optimal Power Flow, OPF, to extract a lookup table for the composition of the droop curve. Simulations prove that generators reach an operating point that corresponds to a minimum loss operation for the relevant power flow distribution. Since OPF has been implemented with frequency and voltage dependent models, the results of the modified droop are stable and also energy efficient. Further studies will address further analysis on systems showing different R/X ratio and modeling of more genera…

EngineeringOperating pointEnvironmental EngineeringDynamic droop controlbusiness.industry020209 energyIslanded microgrid020208 electrical & electronic engineeringEnergy Engineering and Power Technology02 engineering and technologyIndustrial and Manufacturing EngineeringPower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaControl theoryLookup table0202 electrical engineering electronic engineering information engineeringInverterVoltage droopMicrogridElectrical and Electronic EngineeringbusinessEfficient energy useVoltageMinimum losses operation
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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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