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Energies 2012, 5(9), 3534-3549; doi:10.3390/en5093534

A Method for Balancing a Single-Phase Loaded Three-Phase Induction Generator

Graduate School of Engineering Science and Technology, National Yunlin University of Science & Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan
* Author to whom correspondence should be addressed.
Received: 18 May 2012 / Revised: 23 August 2012 / Accepted: 10 September 2012 / Published: 13 September 2012
(This article belongs to the Special Issue Electrical Power and Energy Systems)
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When a three-phase induction generator (IG) supplies unbalanced loads, its terminal voltages and line currents are also unbalanced, which may cause the IG to overheat and need to be derated. A single-phase loaded self-excited induction generator (SEIG) works under most unfavorable load unbalance conditions. This paper proposes a three-capacitor circuit scheme and a method to find the values of the self-excitation capacitors that allow the SEIG to be balanced. The SEIG is modeled by a two-port network equivalent circuit that resolves the SEIG into its positive- and negative-sequence circuits associated with the self-excitation capacitors and the load. The network can then be analyzed by common AC circuit analysis techniques. Successful results for balancing the SEIG supplying a single-phase load have been achieved by properly choosing the values of the excitation capacitors. The proposed method has also been validated by experiments on a 0.37 kW SEIG.
Keywords: induction generator; unbalance; single-phase load induction generator; unbalance; single-phase load
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Wang, Y.-J.; Lee, M.-H. A Method for Balancing a Single-Phase Loaded Three-Phase Induction Generator. Energies 2012, 5, 3534-3549.

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