A dual inverter based supercapacitor direct integration scheme for wind energy conversion systems

Jayasinghe, S.D. Gamini, Vilathgamuwa, D. Mahinda, & Madawala, Udaya K. (2010) A dual inverter based supercapacitor direct integration scheme for wind energy conversion systems. In Proceedings of the 2010 IEEE International Conference on Sustainable Energy Technologies (ICSET), IEEE, Kandy, Sri Lanka, pp. 1-6.

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This paper presents a new direct integration scheme for supercapacitors that are used to mitigate short term power fluctuations in wind power systems. The proposed scheme uses the popular dual inverter topology for grid connection as well as interfacing a supercapacitor bank. The dual inverter system is formed by cascading two 2-level inverters named as the “main inverter” and the “auxiliary inverter”. The main inverter is powered by the rectified output of a wind turbine coupled permanent magnet synchronous generator. The auxiliary inverter is directly connected to a super capacitor bank. This approach eliminates the need for an interfacing dc-dc converter for the supercapacitor bank and thus improves the overall efficiency. A detailed analysis on the effects of non-integer dynamically changing voltage ratio is presented. The concept of integrated boost rectifier is used to carry out the Maximum Power Point Tracking (MPPT) of the wind turbine generator. Another novel feature of this paper is the power reference adjuster which effectively manages capacitor charging and discharging at extreme conditions. Simulation results are presented to verify the efficacy of the proposed system in suppressing short term wind power fluctuations.

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8 citations in Scopus
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ID Code: 75564
Item Type: Conference Paper
Refereed: Yes
Keywords: Direct Integration of Super capacitors, Dual Inverter, Energy Storage Interfacing, Non-integer voltage ratio
DOI: 10.1109/ICSET.2010.5684459
ISBN: 9781424471928
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2010 IEEE
Deposited On: 26 Aug 2014 23:32
Last Modified: 01 Sep 2014 02:27

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