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Analysis and Implementation of a Switched Reluctance Generator in Connection with the Three-Phase Power Grid and Proposal of an Anti-Islanding Strategy

M. A. A. Freitas, G. P. Viajante, D. A. Andrade, J. A. Santos Jr, V. R. Bernardeli, L. G. W. Silva, E.N.Chaves, C.X.Rocha

2016/5/20

Abstract

This paper presents a dynamics study of the Switched Reluctance Generator (SRG) dynamics when connected to a three-phase AC power grid. A mathematical model that includes magnetic saturation is used to represent the SRG, which is driven by an asymmetric half bridge converter. Output generated voltage is smoothed with a shunt capacitor leading to a DC link voltage. This voltage is regulated using a PI compensator that controls the magnetizing angle of the generator phases. It is shown that putting a freewheeling stage between the magnetizing and the demagnetizing states per phase, allows the best use for a better usage of the mechanical power in electromechanical conversion process. Injection of active power in the grid is performed by two PI compensators that determine the modulation indexes to each sinusoidal PWM modulators that drive the three phases of the converter. This work also proposes the implementation of an islanding detection method for distributed generation (DG) systems. This method is based on voltage and frequency parameters detection. It proved to be robust and useful to detect the islanding under different load conditions and the output of the power grid.

Published in: Renewable Energy & Power Quality Journal (RE&PQJ),Vol. 1, Nº. 14
Pages:736-741 Date of Publication: 2016/5/20
ISSN: 2172-038X Date of Current Version:2016/5/4
REF:442-16 Issue Date: May 2016
DOI:10.24084/repqj14.442 Publisher: EA4EPQ

Authors and affiliations

M. A. A. Freitas(1), G. P. Viajante(1), D. A. Andrade(2), J. A. Santos Jr(1), V. R. Bernardeli(1), L. G. W. Silva(1), E.N. Chaves(1), C.X. Rocha
1. Federal Institute of Education, Science and Technology of Goiás. Energy Systems Research Center
(Núcleo de Pesquisas em Sistemas de Energia - NuPSE). Brazil
2. Electric Drives Laboratory, Federal University of Uberlândia. Brazil

Key words

Switched Reluctance Generator, Distributed Generation, Anti-islanding, Renewable energy, Grid Connection.

References

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