Direct integration of battery energy storage systems in distributed power generation

Jayasinghe, S.D. Gamini, Vilathgamuwa, D. Mahinda, & Madawala, Udaya K. (2011) Direct integration of battery energy storage systems in distributed power generation. IEEE Transactions on Energy Conversion, 26(2), pp. 677-685.

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In this paper, a wind energy conversion system interfaced to the grid using a dual inverter is proposed. One of the two inverters in the dual inverter is connected to the rectified output of the wind generator while the other is directly connected to a battery energy storage system (BESS). This approach eliminates the need for an additional dc-dc converter and thus reduces power losses, cost, and complexity. The main issue with this scheme is uncorrelated dynamic changes in dc-link voltages that results in unevenly distributed space vectors. A detailed analysis on the effects of these variations is presented in this paper. Furthermore, a modified modulation technique is proposed to produce undistorted currents even in the presence of unevenly distributed and dynamically changing space vectors. An analysis on the battery charging/discharging process and maximum power point tracking of the wind turbine generator is also presented. Simulation and experimental results are presented to verify the efficacy of the proposed modulation technique and battery charging/discharging process.

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20 citations in Web of Science®

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ID Code: 72491
Item Type: Journal Article
Refereed: Yes
Keywords: Dual inverter, Energy storage, Non-integer voltage ratio, Wind energy
DOI: 10.1109/TEC.2011.2122262
ISSN: 1558-0059
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: © 2011 Institute of Electrical and Electronics Engineers
Deposited On: 03 Jun 2014 05:06
Last Modified: 04 Jun 2014 23:33

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