A Battery Energy Storage interface for wind power systems with the use of grid side inverter
Jayasinghe, S.D. Gamini, Vilathgamuwa, D. Mahinda, & Madawala, Udaya K. (2010) A Battery Energy Storage interface for wind power systems with the use of grid side inverter. In Proceedings of the 2010 IEEE Energy Conversion Congress and Exposition (ECCE), IEEE, Atlanta, GA, The United States of America, pp. 3786-3791.
This paper presents a novel concept of Energy Storage System (ESS) interfacing with the grid side inverter in wind energy conversion systems. The inverter system used here is formed by cascading a 2-level inverter and a three level inverter through a coupling transformer. The constituent inverters are named as the “main inverter” and the “auxiliary inverter” respectively. The main inverter is connected with the rectified output of the wind generator while the auxiliary inverter is attached to a Battery Energy Storage System (BESS). The BESS ensures constant power dispatch to the grid irrespective of change in wind condition. Furthermore, this unique combination of BESS and inverter eliminates the need of additional dc-dc converters. Novel modulation and control techniques are proposed to address the problem of non-integer, dynamically-changing dc-link voltage ratio, which is due to random wind changes. Strategies used to handle auxiliary inverter dc-link voltage imbalances and controllers used to charge batteries at different rates are explained in detail. Simulation results are presented to verify the efficacy of the proposed modulation and control techniques in suppressing random wind power fluctuations.
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|Item Type:||Conference Paper|
|Keywords:||Dual Inverter, Energy Storage Interfacing, Non-integer dynamic voltage ratio|
|Divisions:||Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2010 IEEE|
|Deposited On:||18 Aug 2014 23:05|
|Last Modified:||19 Aug 2014 23:57|
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