A dual inverter with integrated energy storage for wind power systems

Jayasinghe, S.D. Gamini, Vilathgamuwa, D. Mahinda, & Madawala, Udaya K. (2010) A dual inverter with integrated energy storage for wind power systems. In Proceedings of the 2010 International Power Electronics Conference (IPEC), IEEE, Sapporo, Japan, pp. 3182-3187.

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This paper explores the possibility of using grid side inverter as an interface to connect energy storage systems. A dual inverter system, formed by cascading two 2-level inverters through a coupling transformer, is used as the testing model. The inverters are named as “main inverter” and “auxiliary inverter”. The main inverter is powered by the rectified output of the wind generator while the auxiliary inverter is attached to a Battery Energy Storage System (BESS). If there is a surplus of wind power compared to the demand, then that would be stored in BESS while if there is a deficit in wind power then the demand will be satisfied by supplying power from the BESS. This enables constant power dispatch to the grid irrespective of wind changes. Novel modulation and control techniques are proposed to address the problem of non-integer, dynamically-varying dc-link voltage ratio, which is due to random wind changes. Furthermore, a maximum power tracking controller for this unique system is explained in detail. Simulation results verify the efficacy of proposed modulation and control techniques in suppressing random power fluctuations.

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ID Code: 75396
Item Type: Conference Paper
Refereed: Yes
Keywords: Dual inverter, Energy storage interfacing, Non-integer voltage ratio
DOI: 10.1109/IPEC.2010.5543525
ISBN: 9781424453948
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2010 IEEE
Deposited On: 21 Aug 2014 23:37
Last Modified: 26 Aug 2014 02:20

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