A New Method for Synchronous Generator Core Quality Evaluation

Kliman, G.B.; Lee, Sang Bin; Shah, M.R.; Lusted, R.M.; Nair, Nirmal-Kumar C.

doi:10.1109/tec.2004.832058

Cited by 27 publications

(36 citation statements)

References 1 publication

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“…The electromagnetic and thermal finite element formulations were implemented using the estimated burr width. The average σh was obtained as 27.3 S from the analytical equation (5). These inter-laminar contacts are random.…”

Section: Resultsmentioning

confidence: 99%

“…The size of the burrs depends on the type of insulating material, insulation thickness, and age of the punching tools [4]. The electrical short circuit of the inter-laminar contacts causes excessive local heating, and in the absence of sufficient cooling, it might lead to more damage to the electrical machine [5], [6]. Therefore, it is essential to study the additional losses caused by these contacts in the electrical machine.…”

Section: Introductionmentioning

confidence: 99%

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Thermographic Measurement and Simulation of Power Losses Due to Interlaminar Contacts in Electrical Sheets

Shah

Osemwinyen

Rasilo

et al. 2018

IEEE Trans. Instrum. Meas.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermographic Measurement and Simulation of Power Losses Due to Interlaminar Contacts in Electrical Sheets

Shah

Osemwinyen

Rasilo

et al. 2018

IEEE Trans. Instrum. Meas.

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“…Usually Progress in fault placing within core stampings [3]. Progress in ground fault placing for the stator winding [4].…”

mentioning

confidence: 99%

Novel on-line field ground-fault location method for alternators with static excitation

Jamdade¹,

Thorat²

2014

2014 International Conference on Circuits, Power and Computing Technologies [ICCPCT-2014]

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In this paper new on-line field ground fault location method for synchronous machines in combination with field ground fault protection can determine and locate faults in rotor winding. Static excitation is field winding is supplied from rectifier through excitation transformer. Melody of this technique is it can locate position of fault in field winding online reducing forced outage. Principle of this method relies on analysis of ac & dc components of field voltage and voltage across grounding resistance situated in neutral of excitation transformer. This method is analyzed through simulation. resistance. NOMENCLATURE V ac -AC component of grounding resistance voltage.V dc -DC component of grounding resistance voltage. V dc0 -Maximum value of V dc V fdc -DC component of excitation voltage. V fac -AC component of excitation voltage. R g -Grounding resistance. R f -Fault resistance. X -Rotor winding position expressed in percent.

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“…The methods described in [14][15] propose a new localized excitation concept for detecting inter-laminar core faults. A flux injection probe is used for fault excitation and detection.…”

Section: Prior Artmentioning

confidence: 99%

“…The results provided in each of the methods presented in [8][9][10][11][12][13][14][15] show that all the methods are capable of detecting obvious inter-laminar core faults in the stator core. However, there is a need to further improve the fault detection sensitivity and other requirements listed in I.B.…”

Section: Prior Artmentioning

confidence: 99%

An advanced technique for detecting inter-laminar stator core faults in large electric machines

Lee¹,

Shah²,

Kliman³

et al.

38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.

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An advanced technique for detecting incipient interlaminar insulation failure in stator cores of large electric machines is proposed in this paper. The proposed scheme is an off-line method based on low flux stator core excitation that employs a new probe. An iron-core probe is placed in the wedge depression area of the stator and scanned axially to detect the variation in the measured flux due to a fault. Two fault indicators that provide clear indication on fault severity and location are proposed in this paper. A 120MW AC machine stator was tested under a number of intentionally inserted fault conditions using a portable field equipment recently developed. The experimental results show that the fault existence, location, and severity can be determined reliably using the proposed scheme. It is also shown that the fault detection sensitivity and reliability, inspection speed, and user convenience are significantly enhanced.

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A New Method for Synchronous Generator Core Quality Evaluation

Cited by 27 publications

References 1 publication

Thermographic Measurement and Simulation of Power Losses Due to Interlaminar Contacts in Electrical Sheets

Thermographic Measurement and Simulation of Power Losses Due to Interlaminar Contacts in Electrical Sheets

Novel on-line field ground-fault location method for alternators with static excitation

An advanced technique for detecting inter-laminar stator core faults in large electric machines

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