Enhancement of islanded droop-controlled microgrid performance via power filter design

I. P. Nikolakakos, I. A. Al-Zyoud, H. H. Zeineldin, M. S. El-Moursi, A. S. Al-Hinai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

This paper introduces a new method for tuning the power filter for enhancing the stability and transient response of a droop controlled microgrid system based on inverter-interfaced Distributed Generators (DGs). To tackle the stability issue of such a microgrid, faster and more robust droop controllers are required. Thus, the delay and phase shift imposed by the Low Pass Filter (LPF), which is incorporated in the power controller of inverter-based DGs, should also be minimized. In this context, the purpose of this paper is two-fold: a) to show that a tunable power filter with a cutoff frequency below the fundamental frequency can improve the performance of an islanded droop controlled DG microgrid, and b) to suggest a filter tuning method. A comprehensive study is carried out by means of small signal analysis in order to assess the impact of the power filter on the system's eigenvalues. The mathematical analysis shows that the proposed technique results in efficient damping of oscillations following system disturbances. The simulation results verify the superior performance of the proposed approach in terms of improving the transient response and the small signal stability of the islanded DG microgrid during the startup and load excursion operations.

Original languageBritish English
Title of host publication2014 IEEE PES General Meeting / Conference and Exposition
PublisherIEEE Computer Society
EditionOctober
ISBN (Electronic)9781479964154
DOIs
StatePublished - 29 Oct 2014
Event2014 IEEE Power and Energy Society General Meeting - National Harbor, United States
Duration: 27 Jul 201431 Jul 2014

Publication series

NameIEEE Power and Energy Society General Meeting
NumberOctober
Volume2014-October
ISSN (Print)1944-9925
ISSN (Electronic)1944-9933

Conference

Conference2014 IEEE Power and Energy Society General Meeting
Country/TerritoryUnited States
CityNational Harbor
Period27/07/1431/07/14

Keywords

  • Distributed Generation
  • Droop Control
  • Inverter Model
  • Microgrid
  • Power Control
  • Small-Signal Stability

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