Flying supercapacitors as power smoothing elements in wind generation

Jayasinghe, S.D. Gamini & Vilathgamuwa, D. Mahinda (2013) Flying supercapacitors as power smoothing elements in wind generation. IEEE Transactions on Industrial Electronics, 60(7), pp. 2909-2918.

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This paper presents a capacitor-clamped three-level inverter-based supercapacitor direct integration scheme for wind energy conversion systems. The idea is to increase the capacitance of clamping capacitors with the use of supercapacitors and allow their voltage to vary within a defined range. Even though this unique approach eliminates the need of interfacing dc-dc converters for supercapacitors, the variable voltage operation brings about several challenges. The uneven distribution of space vectors is the major modulation challenge. A space vector modulation method is proposed in this paper to address this issue and to generate undistorted currents even in the presence of dynamic changes in supercapacitor voltages. A supercapacitor voltage equalization algorithm is also presented. Moreover, control strategies of the proposed system are discussed in detail. Simulation and experimental results are presented to verify the efficacy of the proposed system in suppressing short-term wind power fluctuations.

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16 citations in Scopus
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15 citations in Web of Science®

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ID Code: 72269
Item Type: Journal Article
Refereed: Yes
Keywords: Capacitor-clamped three-level inverter, Space vector modulation (SVM), Supercapacitor energy storage, Wind energy
DOI: 10.1109/TIE.2012.2233693
ISSN: 1557-9948
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Institute of Electrical and Electronics Engineers
Deposited On: 01 Jun 2014 23:34
Last Modified: 03 Jun 2014 22:49

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