Improvement of stability and load sharing in an autonomous microgrid using supplementary droop control loop

Majumder, Ritwik, Chaudhuri, Balarko, Ghosh, Arindam, Majumder, Rajat, Ledwich, Gerard and Zare, Firuz (2010) Improvement of stability and load sharing in an autonomous microgrid using supplementary droop control loop. IEEE Transactions on Power Systems, 25 2: 796-808. doi:10.1109/TPWRS.2009.2032049


Author Majumder, Ritwik
Chaudhuri, Balarko
Ghosh, Arindam
Majumder, Rajat
Ledwich, Gerard
Zare, Firuz
Title Improvement of stability and load sharing in an autonomous microgrid using supplementary droop control loop
Journal name IEEE Transactions on Power Systems   Check publisher's open access policy
ISSN 0885-8950
1558-0679
Publication date 2010-05-01
Sub-type Article (original research)
DOI 10.1109/TPWRS.2009.2032049
Open Access Status Not yet assessed
Volume 25
Issue 2
Start page 796
End page 808
Total pages 13
Place of publication Piscataway, NJ, United States
Publisher Institute of Electrical and Electronics Engineers
Language eng
Abstract This paper investigates the problem of appropriate load sharing in an autonomous microgrid. High gain angle droop control ensures proper load sharing, especially under weak system conditions. However, it has a negative impact on overall stability. Frequency-domain modeling, eigenvalue analysis, and time-domain simulations are used to demonstrate this conflict. A supplementary loop is proposed around a conventional droop control of each DG converter to stabilize the system while using high angle droop gains. Control loops are based on local power measurement and modulation of the d-axis voltage reference of each converter. Coordinated design of supplementary control loops for each DG is formulated as a parameter optimization problem and solved using an evolutionary technique. The supplementary droop control loop is shown to stabilize the system for a range of operating conditions while ensuring satisfactory load sharing.
Keyword Active and reactive power sharing
Autonomous microgrid
Stability
Supplementary droop
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article number 5306080

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Information Technology and Electrical Engineering Publications
 
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Created: Fri, 12 May 2017, 11:36:06 EST by Firuz Zare on behalf of Learning and Research Services (UQ Library)