Switched Reluctance Generator for Low Voltage DC Microgrid Operation: Experimental Validation

Abdoulaye Sarr, Imen Bahri, Eric Berthelot, Abdoulaye Kebe and Demba Diallo
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Abdoulaye Sarr: Group of Electrical Engineering of Paris, CNRS, CentraleSupelec, Universite Paris-Saclay, 3-11 Rue Joliot Curie, 91192 Gif Sur Yvette, France
Imen Bahri: Group of Electrical Engineering of Paris, CNRS, CentraleSupelec, Universite Paris-Saclay, 3-11 Rue Joliot Curie, 91192 Gif Sur Yvette, France
Eric Berthelot: Group of Electrical Engineering of Paris, CNRS, CentraleSupelec, Universite Paris-Saclay, 3-11 Rue Joliot Curie, 91192 Gif Sur Yvette, France
Abdoulaye Kebe: Ecole Nationale Superieure d’Enseignement Technique et Professionnel, Universite Cheikh Anta Diop, Dakar 999066, Senegal
Demba Diallo: Group of Electrical Engineering of Paris, CNRS, CentraleSupelec, Universite Paris-Saclay, 3-11 Rue Joliot Curie, 91192 Gif Sur Yvette, France

Energies, 2020, vol. 13, issue 12, 1-16

Abstract: This paper presents the control of a Switched Reluctance Generator (SRG) for low voltage DC grid with the objective of efficiency maximizing. Analysis of the energy conversion, including electrical machine losses (Joule, magnetic, mechanical) and power converter losses (switching and conduction), has shown that there is an optimal combination of control variables (turn-on and conduction angles, phase current reference), which maximizes the drive efficiency. The control variables are derived from a Finite Element Analysis and parametric optimization algorithm for all of the operating points in the torque-speed plane and stored in lookup tables. The performances are evaluated with intensive numerical simulations and experimental tests with a 8/6 SRG feeding a DC resistive load for different rotational speeds. The results show good performances of the output DC voltage control with low ripples, even in the presence of speed and load variations. Thanks to the optimization, simulation results show that beyond 1500 rpm, drive efficiency is higher than 60 % and almost reaches 70 % at nominal speed. The experimental results show that, for light loads and beyond rated speed, the drive efficiency lies in the range between 60 % and 80 % .

Keywords: Switched Reluctance Generator; Finite Element Analysis; efficiency optimisation; DC voltage control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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