Improvement of self-excitation process in synchronous generator

Zaļeskis, Genadijs; Gavrilovs, Maksims; Raņķis, Ivars

doi:10.1109/rtucon.2014.6998191

Cited by 1 publication

(5 citation statements)

References 3 publications

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“…1.) with buck converter [14] the excitation winding is connected as a load of buck converter with an input filter and one switching element instead of three thyristors, which were used in the previous configuration [8].…”

Section: A Functional Scheme Of the Self-excitation Systemmentioning

confidence: 99%

“…At low speed the remanent electromotive force of the generator is low, but its frequency can be measured by measurement unit (MU) of the self-excitation system [8,14], thus the generator speed is defined. Self-excitation process can be provided only when generator speed is at proper level [8,14].…”

Section: B Operation Of the Systemmentioning

confidence: 99%

“…The self-excitation system equivalent scheme [14] can be presented as a series connection of inductances and resistances of windings and voltage source of dependent on circuit's current electromotive force (Fig. 2).…”

Section: Self-excitation Processmentioning

confidence: 99%

“…Self-excitation system was applied to double fed induction generator working as synchronous generator with independent excitation winding [14].…”

Section: A Experimental Set-upmentioning

confidence: 99%

“…For these reasons a scheme with the buck topology DC/DC converter was applied for self-excitation of the synchronous generator [14,15]. The feature of this scheme is the charging of the converter input filter capacitor before the start of system operation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Self-Excitation System for Synchronous Generator

Zaļeskis¹,

Raņķis²,

Prieditis³

2013

Electrical, Control and Communication Engineering

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-Self-excitation for synchronous generator is described in the paper. The system is based on a buck converter input filter capacitor discharge through excitation winding of the generator. The buck converter is connected to the stator outputs through an uncontrollable diode rectifier, but excitation winding is used as a load. Input filter capacitor of the converter provides initial current pulse which magnetizes excitation system and produces the generator voltage increase, for this reason the capacitor is charged before self-excitation process starts.Results of the computer simulation and physical experiment are obtained and presented. These results show that the proposed self-excitation converter in conjunction with an input capacitor pre-charged from a low-power electronic generator actually magnetizes the generator excitation system therefore generator voltage and accordingly excitation current increases. Stabilization of generator output voltage occurs with a voltage surge, though its peak value slightly exceeds the reference one.The future investigation of the proposed self-excitation system may include definition of mathematical equations which describe transients in the generator's self-excitation mode and development of control methods for purpose of self-excitation process control without voltage peaks. The computer model also should be improved.

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Section: A Functional Scheme Of the Self-excitation Systemmentioning

confidence: 99%