Secondary Control for Reactive Power Sharing in Droop-Controlled Islanded MicroGrids

A. Micallef, M. Apap, C. Spiteri-Staines, Josep M. Guerrero

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

32 Citations (Scopus)
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Abstract

This paper focuses on the islanded operation of microgrids. In this mode of operation, the microsources are required to cooperate autonomously to regulate the local grid voltage and frequency. Droop control is typically used to achieve this autonomous voltage and frequency regulation. However, droop control has real and reactive power sharing limitations when there are mismatches between the microsources. This paper analyses the effect due to mismatches in the power line impedances connecting the source inverters to the microgrid.
From the simulations results obtained, it was shown that the reactive power demand is unequally shared between the microsource inverters when there are mismatches between the power line impedances. To achieve equal reactive power sharing between the inverters, an external loop requiring low bandwidth
communications was implemented in a central controller.
Simulation results are presented showing the feasibility of the proposed solution in achieving reactive power sharing between the inverters connected to the microgrid.
Original languageEnglish
Title of host publicationProceedings of the 21st IEEE International Symposium on Industrial Electronics (ISIE), 2012
Number of pages7
PublisherIEEE
Publication date2012
Pages1627-1633
ISBN (Print)978-1-4673-0159-6
ISBN (Electronic)978-1-4673-0157-2
DOIs
Publication statusPublished - 2012
Event21st IEEE International Symposium on Industrial Electronics - , China
Duration: 28 May 201231 May 2012

Conference

Conference21st IEEE International Symposium on Industrial Electronics
CountryChina
Period28/05/201231/05/2012
SeriesIndustrial Electronics (ISIE), IEEE International Symposium on
ISSN2163-5137

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