Improvement of stability and load sharing in an autonomous microgrid using supplementary droop control loop
Data(s) |
2010
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Resumo |
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 sup-plementary droop control loop is shown to stabilize the system for a range of operating conditions while ensuring satisfactory load sharing. |
Formato |
application/pdf |
Identificador | |
Publicador |
Institute of Electrical and Electronics Engineers Power & Energy Society |
Relação |
http://eprints.qut.edu.au/31221/2/31221.pdf http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=59 Majumder, Ritwik, Chaudhuri, Balarko, Ghosh, Arindam, Majumder, Rajat, & Ledwich, Gerard F. (2010) Improvement of stability and load sharing in an autonomous microgrid using supplementary droop control loop. IEEE Transactions on Power Systems. (Unpublished) |
Direitos |
Copyright 2010 Institute of Electrical and Electronics Engineers Power & Energy Society |
Fonte |
Faculty of Built Environment and Engineering; School of Engineering Systems |
Palavras-Chave | #090608 Renewable Power and Energy Systems Engineering (excl. Solar Cells) |
Tipo |
Other |