Virtual resistance based active damping solution for constant power instability in AC microgrids

Vilathgamuwa, D.M., Zhang, X.N., Jayasinghe, S.D.G., Bhangu, B.S., Gajanayake, C.J., & Tseng, K.J. (2011) Virtual resistance based active damping solution for constant power instability in AC microgrids. In Proceedings of the 37th Annual Conference on IEEE Industrial Electronics Society (IECON 2011), IEEE, Melbourne, VIC, pp. 3646-3651.

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With ever-increasing share of power electronic loads constant power instability is becoming a significant issue in microgrids, especially when they operate in the islanding mode. Transient conditions like resistive load-shedding or sudden increase of constant power loads (CPL) might destabilize the whole system. Modeling and stability analysis of AC microgrids with CPLs have already been discussed in literature. However, no effective solutions are provided to stabilize this kind of system. Therefore, this paper proposes a virtual resistance based active damping method to eliminate constant power instability in AC microgrids. Advantages and limitations of the proposed method are also discussed in detail. Simulation results are presented to validate the proposed active damping solution.

Impact and interest:

9 citations in Scopus
7 citations in Web of Science®
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ID Code: 74901
Item Type: Conference Paper
Refereed: Yes
Keywords: AC microgrids, Active damping, Constant power instability, Virtual resistance, Damping, Distributed power generation, Power grids, Power system transient stability
DOI: 10.1109/IECON.2011.6119901
ISBN: 9781612849690
ISSN: 1553-572X
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 IEEE
Deposited On: 11 Aug 2014 23:49
Last Modified: 14 Aug 2014 01:04

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