A cascade multilevel STATCOM for wind generation systems

Jayasinghe, S.D.G., Vilathgamuwa, D.M., & Madawala, U.K. (2009) A cascade multilevel STATCOM for wind generation systems. In Proceedings of the International Conference on Power Electronics and Drive Systems (PEDS 2009), IEEE, Taipei, Taiwan, pp. 1323-1328.

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Abstract

This paper presents a novel STATCOM configuration for voltage quality improvement in wind power generation systems. The proposed STATCOM is formed by cascading two 3-level inverters, bulk inverter' andconditioning inverter', through a coupling transformer. Both inverters are powered by dc-link capacitors and they are charged by a small amount of active power drawn from the grid. To minimize switching losses, the high power bulk inverter operates at low frequency while low power high frequency conditioning inverter is used to suppress harmonic content produced by the bulk inverter output. With only 24 switches this topology can synthesize a nine level inverter, if the dc-link voltage ratio is maintained at 3:1. Modulation and control techniques have been developed to meet this requirement. Reactive power of the STATCOM is controlled to mitigate voltage sags or swells caused by sudden wind changes. Simulation and experimental results are presented to verify the efficacy of the proposed modulation and control techniques used in the STATCOM.

Impact and interest:

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ID Code: 75630
Item Type: Conference Paper
Refereed: Yes
Keywords: Cascade Multilevel converter, STATCOM, Neutral point potential balancing
DOI: 10.1109/PEDS.2009.5385895
ISBN: 9781424441662
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2009 by IEEE
Deposited On: 28 Aug 2014 03:48
Last Modified: 29 Aug 2014 01:03

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