Power Sharing in Angle Droop Controlled Microgrids

Component mismatches and parameters drifts drastically affect stability and long-term operation of droop-controlled inverter-based microgrids. This paper analyzes and illustrates the impact of design variations and parameter drifts between angle droop controlled inverter-interfaced sources in a micr...

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Bibliographic Details
Published in:IEEE transactions on power systems 2017-11, Vol.32 (6), p.4743-4751
Main Authors: Kolluri, Ramachandra Rao, Mareels, Iven, Alpcan, Tansu, Brazil, Marcus, de Hoog, Julian, Thomas, Doreen Anne
Format: Article
Language:English
Subjects:
AC microgrids
active power sharing
autonomous microgrid
Clocks
distributed control
droop control
Frequency control
Inverters
Microgrids
power system reliability
Power system stability
smart grids and synchronization
Stability criteria
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Summary:Component mismatches and parameters drifts drastically affect stability and long-term operation of droop-controlled inverter-based microgrids. This paper analyzes and illustrates the impact of design variations and parameter drifts between angle droop controlled inverter-interfaced sources in a microgrid. It is shown that microgrid stability is very sensitive to parameter drifts, especially in frequency. A coordination control scheme that uses internode communications is proposed for improving the stability margin and ensuring the desired power sharing. Conditions for stability are derived and simulation results are presented to validate the performance of the proposal.
ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2017.2672569