Frequency-based control of a micro-grid with multiple renewable energy sources

Giampaolo Buticchi, Marco Liserre, Davide Barater, Carlo Concari, Alessandro Soldati, Giovanni Franceschini

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

13 Citations (Scopus)


Stand-alone micro-grids need a proper management of the active power exchange. This work is focused on the parallel operation of multiple grid-connected converters in an island-grid system. The proposed solution features a master inverter which emulates the grid and multiple grid-connected converters operating in parallel. The current sharing and overload protection is achieved by small frequency variations of master inverter's output, that are detected by the grid-connected converters. This mechanism exploits the behavior of the derating characteristics embedded in grid-connected inverters, that must reduce the output power if the grid frequency increases. In this case, standard grid-connected equipment can be used to realize micro-grids without the need of digital communication between the power units. Two possible scenarios are analyzed: low-power microgrid with master/slave converters, and low voltage grid fed by a Smart Transformer (ST) which performs the frequency control.

Original languageEnglish
Title of host publication2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages8
ISBN (Electronic)9781479956982
Publication statusPublished - 11 Nov 2014
Externally publishedYes

Publication series

Name2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology


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