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Energies 2018, 11(2), 397; https://doi.org/10.3390/en11020397

AC-Chopper-Based Inrush Current Suppressor in a Wind Power Generation System with Squirrel-Cage Induction Machines

1
Graduate School of Science and Engineering, Yamaguchi University, 2-16-1, Tokiwadai Ube City 755-8611, Japan
2
Department of Electrical Engineering, National Institute of Technology, Ube College, 2-14-1, Tokiwadai Ube City 755-8555, Japan
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 5 January 2018 / Revised: 3 February 2018 / Accepted: 6 February 2018 / Published: 8 February 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

This paper proposes the inrush current suppressor using an AC chopper in a large-capacity wind power generation system (WPGS) with two squirrel-cage induction machines (SCIMs), which are switched over depending on the wind speed. The input side of the AC chopper is connected to the source in parallel. The output side of the AC chopper is connected in series with the SCIM through matching transformers. In the proposed inrush current suppressor, the output voltage of the AC chopper is the same as the receiving-end voltage before connecting the SCIM. By gradually decreasing the output voltage of the AC chopper, the applied voltage of the SCIM is gradually increased without the inrush current. The basic principle of the proposed inrush current suppressor is discussed in detail. A computer simulation is implemented to confirm the validity and practicability of the proposed inrush current suppressor using a power system computer-aided design/electromagnetic transients including DC (PSCAD/EMTDC). Simulation results demonstrate that the proposed inrush current suppressor can suppress the inrush current. View Full-Text
Keywords: wind power generation; AC chopper; inrush current; voltage sag wind power generation; AC chopper; inrush current; voltage sag
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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. (CC BY 4.0).
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Shibata, S.; Yamada, H.; Tanaka, T.; Okamoto, M. AC-Chopper-Based Inrush Current Suppressor in a Wind Power Generation System with Squirrel-Cage Induction Machines. Energies 2018, 11, 397.

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