Brushless exciter model

Kabir, S. M. Lutful; Shuttleworth, R.

doi:10.1049/ip-gtd:19949704

Cited by 17 publications

(3 citation statements)

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“…In 508 lagging synchronisations, which are not shown, the field current drops to zero but it does not go negative, although simulation suggests that it should. Presumably, at this point, there is not enough trapped flux remaining to induce the voltage necessary to break down either the diode bridge or the varistor in the brushless excitation system [29,30].…”

Section: Rotor Lagging Mains Synchronisationmentioning

confidence: 99%

Effect of loading, voltage difference and phase angle on the synchronisation of a small alternator

Best

Morrow

Crossley

2009

IET Electr. Power Appl.

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Synchronisation of small distributed generation, 30 kVA -2 MVA, employing salient-pole synchronous machines is normally performed within a narrow range of tolerances for voltage, frequency and phase angle. However, there are situations when the ability to synchronise with non-ideal conditions would be beneficial. Such applications include power system islanding and rapid generator start-up. The physical process and effect of out-of-phase synchronisation is investigated both through simulation and experimental tests on a salientpole alternator. There are many factors that affect synchronisation, but particular attention is given to synchronisation angle, voltage difference and, as generators will be loaded during islanding, the load angle. The results suggest that it would be acceptable for the maximum synchronisation angle of distributed generation to exceed that of current practice. Interesting observations on the nature of out-of-phase synchronisation are made, including some specific to small salient-pole synchronous machines. Furthermore, recommendations are made for synchronisation under different system conditions.reactance a angular acceleration u sync synchronisation angle d load angle t time constant F magnetic flux C flux linkage v angular speed Subscripts and superscripts a armature bus power system bus d direct axis (armature) e electrical f field k d direct-axis damper k q quadrature axis damper m mechanical m d direct-axis mutual m q quadrature-axis mutual

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Section: Rotor Lagging Mains Synchronisationmentioning

confidence: 99%

Effect of loading, voltage difference and phase angle on the synchronisation of a small alternator

Best

Morrow

Crossley

2009

IET Electr. Power Appl.

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“…The widely used transfer function for the brushless exciter proposed by the IEEE [2] is found to be very approximate. An alternative approach for representing the brushless excitation system is to model the exciter using a synchronous generator dq-axes model in conjunction with a rectifier model [3][4][5][6][7]. This approach offers improved simulation of the brushless excitation system compared to the classical IEEE model.…”

Section: Introductionmentioning

confidence: 99%

“…This approach offers improved simulation of the brushless excitation system compared to the classical IEEE model. However, the variation of the exciter magnetization inductance due to the hysteresis This project is part of the R&D program of the NSERC Chair entitled "Energy efficiency in electrical machines for small renewable energy production systems" established in 2009 effects is found to cause a deviation between measured and simulated waveforms during transients [4,5]. Therefore, accurate simulation of the power system dynamics requires incorporating the hysteresis effects into the brushless exciter model.…”

Section: Introductionmentioning

confidence: 99%

Modeling of hysteresis dependent magnetization inductance for a brushless exciter model

Ibrahim

Pillay

2013

2013 International Electric Machines &Amp; Drives Conference

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In this paper, a model is developed to incorporate the magnetic hysteresis effects into a brushless exciter dq-axes model. The developed model reconstructs the magnetization flux linkage-current loops using few measured parameters. The model can also achieve computationally efficient simulation by utilizing the Energetic model for the steel hysteresis loop modeling. The developed model is then applied to reconstruct the measured flux linkage-current loops in an Epstein frame test fixture with an air gap. The simulation results agree well with the measured loops, confirming the validity of the proposed model. IndexTerms-Brushless exciter, excitation system, synchronous generator, magnetic hysteresis, Energetic model.

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Improved dynamic average modelling of brushless excitation system in all rectification modes

Shahnazari

Vahedi

2010

IET Electr. Power Appl.

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Brushless exciter model

Cited by 17 publications

References 0 publications

Effect of loading, voltage difference and phase angle on the synchronisation of a small alternator

Effect of loading, voltage difference and phase angle on the synchronisation of a small alternator

Modeling of hysteresis dependent magnetization inductance for a brushless exciter model

Improved dynamic average modelling of brushless excitation system in all rectification modes

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