Modeling and analysis of a novel variable-speed cage induction generator

Madawala, Udaya K., Geyer, Tobias, Bradshaw, Jonathan B., & Vilathgamuwa, D. Mahinda (2012) Modeling and analysis of a novel variable-speed cage induction generator. IEEE Transactions on Industrial Electronics, 59(2), pp. 1020-1028.

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This paper introduces a novel cage induction generator and presents a mathematical model, through which its behavior can be accurately predicted. The proposed generator system employs a three-phase cage induction machine and generates single-phase and constant-frequency electricity at varying rotor speeds without an intermediate inverter stage. The technique uses any one of the three stator phases of the machine as the excitation winding and the remaining two phases, which are connected in series, as the power winding. The two-series-connected-and-one-isolated (TSCAOI) phase winding configuration magnetically decouples the two sets of windings, enabling independent control. Electricity is generated through the power winding at both sub- and super-synchronous speeds with appropriate excitation to the isolated single winding at any frequency of generation. A dynamic mathematical model, which accurately predicts the behavior of the proposed generator, is also presented and implemented in MATLAB/Simulink. Experimental results of a 2-kW prototype generator under various operating conditions are presented, together with theoretical results, to demonstrate the viability of the TSCAOI power generation. The proposed generator is simple and capable of both storage and retrieval of energy through its excitation winding and is expected to be suitable for applications, such as small wind turbines and microhydro systems.

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29 citations in Scopus
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23 citations in Web of Science®

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ID Code: 72291
Item Type: Journal Article
Refereed: Yes
Keywords: Alternating-current (ac) generators, Induction generators, Self-excitation, Standalone operation, Wind power generation
DOI: 10.1109/TIE.2011.2157277
ISSN: 1557-9948
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: © 2012 Institute of Electrical and Electronics Engineers
Deposited On: 02 Jun 2014 03:00
Last Modified: 03 Jun 2014 22:51

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