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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; in revised form: 23 August 2012 / Accepted: 10 September 2012 / Published: 13 September 2012
Abstract: 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
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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.
Wang Y-J, Lee M-H. A Method for Balancing a Single-Phase Loaded Three-Phase Induction Generator. Energies. 2012; 5(9):3534-3549.
Wang, Yaw-Juen; Lee, Ming-Hsueh. 2012. "A Method for Balancing a Single-Phase Loaded Three-Phase Induction Generator." Energies 5, no. 9: 3534-3549.