A complete small signal modelling and adaptive stability analysis of nonlinear droop-controlled microgrids

Hassan Abdelgabir, Ali R. Boynuegri, Ali Elrayyah, Yilmaz Sozer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A Nonlinear droop control has been introduced to establish an effective power sharing between the distributed generators without the need of communication links in microgrids (MGs). However, one of the missing studies in the literature is the effects of the nonlinear droop relations on the stability of the MGs. In this paper, the stability of an inverter based MG operating with the nonlinear frequency droop-control has been analyzed. Firstly, a particle swarm optimization technique (PSO) was used to optimize the nonlinear frequency droop relations for minimizing the operating cost of the MG. Secondly, a complete small-signal state-space model of the MG system with the optimized nonlinear droop relations has been developed and the model is updated periodically. The stability of the system is then checked automatically at different operating points. Small signal stability analysis of an islanded microgrid were performed using MATLAB/Simulink and the results were experimentally verified on an MG setup.

Original languageEnglish
Title of host publicationAPEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3333-3339
Number of pages7
Volume2018-March
ISBN (Electronic)9781538611807
DOIs
Publication statusPublished - 18 Apr 2018
Event33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 - San Antonio, United States
Duration: 4 Mar 20188 Mar 2018

Other

Other33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
CountryUnited States
CitySan Antonio
Period4/3/188/3/18

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Keywords

  • MG stability
  • Microgrids
  • Nonlinear droop control
  • Particle swarm optimization
  • Small-signal modelling

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Abdelgabir, H., Boynuegri, A. R., Elrayyah, A., & Sozer, Y. (2018). A complete small signal modelling and adaptive stability analysis of nonlinear droop-controlled microgrids. In APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition (Vol. 2018-March, pp. 3333-3339). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2018.8341581