Analysis of shaft voltages in large synchronous generators

Torlay, J.-E.; Corenwinder, C.; Audoli, A.; Herigault, J.; Foggia, Albert

doi:10.1109/iemdc.1999.769189

Cited by 19 publications

(7 citation statements)

References 2 publications

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“…3 presents the time shaft voltages. The latter is almost nil in the case of healthy conditions while it shows a sinusoidal behavior at the rated frequency due to the static eccentricity [1,2].…”

Section: Application To the Case Of Static Eccentricitymentioning

confidence: 97%

“…However, by differentiating between the various causes, it can be used as a preventive diagnostic variable. In previous works [1,2], this voltage is modeled using FEA through an external circuit coupling the shaft to the casing. To go deeper in the physical representation of the shaft voltage while studying the effect of each cause, we propose an approach considering the whole machine as a magnetic tore.…”

Section: Introductionmentioning

confidence: 99%

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An approach to model shaft voltage of wound rotor synchronous machines

Darques

Tounzi

Menach

et al. 2016

2016 IEEE Conference on Electromagnetic Field Computation (CEFC)

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Section: Application To the Case Of Static Eccentricitymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

An approach to model shaft voltage of wound rotor synchronous machines

Darques

Tounzi

Menach

et al. 2016

2016 IEEE Conference on Electromagnetic Field Computation (CEFC)

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“…U nastavku rada analiziraće se uticaj tiristorskog sistema pobude na vrednost potencijala vratila i biće razmotrene preventivne mere za sprečavanje pojave ležajnih struja i potencijala vratila. [1], [2], [4], [5] …”

Section: Uzroci Nastanka Potencijala Vratila I Ležajnih Strujaunclassified

Turboset shaft voltage

Klasnić¹,

Joksimović²,

Ćirić³

2016

Zb EI Nikola Tesla

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Kratak sadržaj: U radu je analizirana pojava potencijala vratila i ležajnih struja kod električnih mašina. Dat je pregled uzroka nastanka ovih napona i struja kao i eventualnih posledica. U nastavku je analiziran uticaj tiristorskog sistema pobude na veličinu potencijala vratila, prikazana je metoda za merenje potencijala vratila, predložene su preventivne mere za smanjenje potencijala vratila kod turboagregata. Na kraju su prikazani rezultati merenja potencijala vratila na jednom turboagregatu u okviru Elektroprivrede Srbije.Ključne reči: turboagregat, potencijal vratila, statički sistem pobude, ležajne struje UvodTokom rada električnih mašina, naizmenični (AC) i jednosmerni (DC) naponi se mogu indukovati u vratilu agregata. Preveliki potencijal vratila može dovesti do prevelikih ležajnih struja koje mogu prouzrokovati ozbiljna oštećenja ležajeva obrtnih električnih mašina. U ovom radu prikazani su rezultati merenja potencijala vratila turboagregata sa osvrtom na načine i uzroke nastanka ovih napona i njihove eventualne posledice. Merenja su izvršena na jednom turboagregatu u sklopu Elektroprivrede Srbije čiji su osnovni podaci dati u tabeli 1.

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“…They concluded that greater eccentricities result in higher shaft-flux linkages and that there are specific harmonic components that are related to shorted field turns. Today et al performed a broader study on the influence of the most common machine faults on shaft voltages in large synchronous generators [11,12] They showed that a failure on a synchronous machine can be identified by analysing shaft voltages and neutral voltages. Nippes has recently authored a comprehensive paper on the use of shaft voltages and grounding currents for incipient fault detection [13].…”

Section: Introductionmentioning

confidence: 99%

Determination of shaft position from shaft voltage on a synchronous generator

Hoffe

Meyer

Cronje

2005

2005 5th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives

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Shaft voltages and currents are an unavoidable characteristic of rotating machines. Recently there has been renewed interest in the diagnostic possibilities of these signals. This paper presents a technique to determine the mechanical shaft position using a capture of the shaft voltage and a mechanically aligned prerecorded reference. The tests were carried out on a 400 V salient 4-pole generator with rotating exciter. Gold-bristle brushes were used which provided excellent signal clarity. A PC based acquisition system was used which facilitated averaging to further reduce noise as well as the capture ofabsolute position using a rotary encoder. The technique successfully determined the shaft position using a test signal which was considerably distorted. This technique could prove useful in the location offaults within a machine, and investigation is continuing.

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Analysis of shaft voltages in large synchronous generators

Cited by 19 publications

References 2 publications

An approach to model shaft voltage of wound rotor synchronous machines

An approach to model shaft voltage of wound rotor synchronous machines

Turboset shaft voltage

Determination of shaft position from shaft voltage on a synchronous generator

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