Origins of stator current spectra in DFIGs with winding faults and excitation asymmetries

Williamson, S.; Djurović, Siniša

doi:10.1109/iemdc.2009.5075262

Cited by 56 publications

(71 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Much work has been published on modelled data, simulations and laboratory benches [18][19][20][21][22] but there is a lack of field measurement campaigns for current signature analysis. In the present work, an in-service DFIG wind turbine with potential gearbox faults has been analysed through electrically-based techniques.…”

Section: Methodsmentioning

confidence: 99%

“…Similarly occurs for rotor unbalance components. A minimal degree of air gap is always introduced during manufacturing or assembly of the induction machine, which modulates the current at the rotational speed [19]. When the air gap degree increases, the rest of the sub-harmonics related to rotor unbalance appear, indicating the presence of the fault.…”

Section: Spectral Analysis Of the Stator Currentsmentioning

confidence: 99%

See 1 more Smart Citation

Condition monitoring of a wind turbine doubly-fed induction generator through current signature analysis

Artigao¹,

Honrubia-Escribano

Gómez‐Lázaro

2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract. Operation and maintenance (O&M) of wind turbines is recently becoming the spotlight in the wind energy sector. While wind turbine power capacities continue to increase and new offshore developments are being installed, O&M costs keep raising. With the objective of reducing such costs, the new trends are moving from corrective and preventive maintenance toward predictive actions. In this scenario, condition monitoring (CM) has been identified as the key to achieve this goal. The induction generator of a wind turbine is a major contributor to failure rates and downtime where doubly-fed induction generators (DFIG) are the dominant technology employed in variable speed wind turbines. The current work presents the analysis of an in-service DFIG. A one-year measurement campaign has been used to perform the study. Several signal processing techniques have been applied and the optimal method for CM has been identified. A diagnosis has been reached, the DFIG under study shows potential gearbox damage.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Spectral Analysis Of the Stator Currentsmentioning

confidence: 99%

Condition monitoring of a wind turbine doubly-fed induction generator through current signature analysis

Artigao¹,

Honrubia-Escribano

Gómez‐Lázaro

2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…On the other hand, the proper function should be considered for rotor's poles and slot opening for accuracy of modeling. Relative figures are shown in Figure 3, and relevant mathematical model has been written in (1) and (2) for P-pole machine that are proposed in [9] where ∂ ¼ (C) Eccentricity fault Eccentricity fault is caused because of ball bearing erosion and machine obsolescence, because of which un-uniformed air gap will be produced as shown in Figure 4. It has three cases named static, dynamic, and mixed eccentricity.…”

Section: Synrm's Samples For Healthy and Faulty Behavior Studyingmentioning

confidence: 99%

Torque/current spectral analysis for healthy and eccentricity faulty synchronous reluctance machine using mathematical modeling method

Naderi

2015

Int. Trans. Electr. Energ. Syst.

View full text Add to dashboard Cite

SUMMARYIn this research, considering slot opening and distributed winding effects, torque ripple analysis is studied for four separate synchronous reluctance machines (SynRMs) under health and eccentricity fault conditions using a mathematical method. A finite element method (FEM) validated model is produced by mathematical modeling, and numerical method is used for the machine's behavior studying with voltage source supplying. With this aim, the machine's parameters have been computed under health and eccentricity fault conditions, using modified winding function theory (MWFT). A method of dynamic and static eccentricity fault diagnosis is proposed, which uses machine vibration analysis, and the results suggest that the eccentricity fault does not have any significant effect on the machine's currents. Moreover, unbalance magnetic pull (UMP) is computed under eccentricity fault conditions and mechanical un-stability is shown. Mathematical base model and voltage source machine supply and also presenting a discrete machine modeling method are the main advantages of this paper compared with other similar works that are usually FEM-based studies or have been based on current source power supply. The research is applicable to healthy and faulty machine behavior, and the methodical modeling is obviously applicable to other machines.

show abstract

“…The coil connections of individual stator windings are made accessible via an external terminal box and can be connected to achieve a desired winding configuration [12]. The healthy and faulty configurations examined in this work are shown in Fig.…”

Section: Experimental Test Rigmentioning

confidence: 99%

Analysis of a wound rotor induction machine low frequency vibroacoustic emissions under stator winding fault conditions

Sarma¹,

Li²,

Djurović³

et al. 2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

Self Cite

View full text Add to dashboard Cite

This paper examines the wide band vibroacoustic emissions of a low power industrial wound rotor induction machine (WRIM) design operating with balanced windings and with a stator winding fault. The aim of the presented study is to enable a clearer understanding of the possible spectral content of the WRIM vibration and acoustic emission signals in healthy and electrical fault conditions, with a view to assessing the possibility of vibroacoustic based electrical fault recognition. For this purpose an experimental study is undertaken on a laboratory test rig in which the low frequency spectral content of the synchronously recorded vibration and acoustic emissions signals is mapped and correlated for healthy and faulty operating conditions. It is shown that the wide band winding fault induced changes can be clearly correlated and recognised in both the vibration in the acoustic emission signals of the investigated machine design

show abstract

Origins of stator current spectra in DFIGs with winding faults and excitation asymmetries

Cited by 56 publications

References 8 publications

Condition monitoring of a wind turbine doubly-fed induction generator through current signature analysis

Condition monitoring of a wind turbine doubly-fed induction generator through current signature analysis

Torque/current spectral analysis for healthy and eccentricity faulty synchronous reluctance machine using mathematical modeling method

Analysis of a wound rotor induction machine low frequency vibroacoustic emissions under stator winding fault conditions

Contact Info

Product

Resources

About