Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/87018
Title: Stabilizing droop variation of converter-connected generation in autonomous microgrids with virtual inertia control
Authors: Subramanian, Lalitha
Gooi, Hoay Beng
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Droop
Oscillations
Issue Date: 2018
Source: Subramanian, L., & Gooi, H. B. (2018). Stabilizing droop variation of converter-connected generation in autonomous microgrids with virtual inertia Control. 2018 IEEE Energy Conversion Congress and Exposition (ECCE).
Abstract: Droop scheduling plays an important role in the microgrid frequency regulation market, as the well-known proportional load sharing may be practically inapplicable in many cases of inverter-based microgrids. The drooping capability of each inverter unit in the microgrid is determined by the availability and response time of its associated energy storage. However, some renewable energy-based units may be chosen to operate at the maximum power point because of their zero fuel cost. This scenario demands some high capacity units to operate with a high or infinite droop coefficient, thereby restricting their contribution to the frequency regulation. In this work, we examine the influence of this droop variation on the small signal stability of the microgrid using the root locus technique. We then substitute some of the existing droop-controlled units with virtual inertia control at critical nodes to study the effect of coordinated droop and inertia control. Finally, the choice and size of energy storage necessary to emulate a certain level of inertia and droop are compared. The study shows that the stability of the system may be enhanced while saving on the economics of storage requirement if the inertia and droop control act in a coordinated manner.
URI: https://hdl.handle.net/10356/87018
http://hdl.handle.net/10220/47706
DOI: 10.1109/ECCE.2018.8557936
Rights: © 2018 Institute of Electrical and Electronics Engineers (IEEE). All rights reserved. This paper was published in 2018 IEEE Energy Conversion Congress and Exposition (ECCE) and is made available with permission of Institute of Electrical and Electronics Engineers (IEEE).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Conference Papers
ERI@N Conference Papers
IGS Conference Papers

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