Rеvuе des Energies Renouvelables
Volume 24, Numéro 1, Pages 105-120
2021-06-30

Small Signal Modelling And Stability Analysis Of Island Mode Microgrid Paralleled Inverters



Authors : Bennia Ilyas . Harrag Abdelghani . Daili Yacine .

Abstract

Several microgrid (MG) control strategies were proposed and studied in the literature. However, the control of MG still challenging to improve their dynamic response and study their stability, the most popular control approach in the literature is hierarchical control with their three layers which is responding to MG control requirements, in primary control layer droop control is generally considered due to their main feature of sharing the power equally between inverters, without needing communication infrastructure. This paper presents a small-signal analysis for a MG composed by parallel-connected inverters in island mode and controlled using droop method, aiming to analyze the stability by performing eigenvalues and sensitivity analysis which allows to obtain the behavior of the system and study the influence of the droop parameters on this later, small-signal model and Simulink block model were developed and simulated, simulation results show a high correspondence and agreement between the model developed using Matlab Simulink-SimPowerSystem library and the developed small-signal model which confirms the validity of this later

Keywords

Small-signal analysis ; Paralleled inverters ; Island mode ; Droop control ; Stability analysis

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