Field experiences with the measurement of partial discharges on rotating equipment

Blokhintsev, I.; Golovkov, M. S.; Golubev, A.; Kane, C.

doi:10.1109/60.815010

Cited by 16 publications

(10 citation statements)

References 2 publications

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“…After denoising, the type of developing PDs are identified using the hybrid clustering method, phase-resolved PD patterns, PD magnitude/number distribution, PD trend analysis, spectral analysis, PD-based indexes, and by determining statistical parameters [9], [10]. With single PD, propagation and attenuation characteristics at different electrical lengths [11], [12] are extensively evaluated to identify the location of PD. With the limited number of data relating the location of the PD and the monitored nodes, propagation model studies become one important aspect of the PD research area.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Partial Discharge Propagation in Power Network

Birlasekaran

Choi

2005

IEEE Trans. On Energy Conversion

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Abstract-Locating partial discharge (PD) using single-pulse analysis is considered in this research. The studied network is a generator connected to a transformer through the busbar. Since the stator winding of a generator consists of a finite number of wound coils and finite length busbar, an analysis based on a simple ladder transmission-line model with a finite number of sections has been carried out. A simulation study using the SIMULINK package on the model produces network frequency responses under varied line parameters, and a varied number of sections and termination conditions. The investigation shows that the results of simultaneous PD measurements at different locations can be reproduced satisfactorily using the network model in terms of predicting its resonant frequencies and the time-domain envelope profile of the PD. The proposed method enables one to discriminate PD pulses originating from different locations of the generator winding, as it is observed that the PD magnitude attenuates during propagation.Index Terms-Busbar and transformer, partial-discharge (PD) models of generator, PD propagation, transfer function.

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Section: Introductionmentioning

confidence: 99%

Simulation of Partial Discharge Propagation in Power Network

Birlasekaran

Choi

2005

IEEE Trans. On Energy Conversion

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“…Such technologies have the common problem resulting from very rapid attenuation of the high frequency signal as it travels through the winding. Therefore, sensors commonly installed at winding terminals have a limited zone of sensitivity and provide valuable information for that zone only [4]. The evident solution to this problem is the use of PD sensors imbedded into the winding to get information on the winding itself.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, most of the HV machines already have RTD detectors embedded into the winding by the manufacturer and these detectors can be used for partial discharge measurements [2,4]. CutlerHammer has over two years of experience using RTDs as PD detectors.…”

Section: Introductionmentioning

confidence: 99%

RTD as the valuable tool in partial discharge measurements on rotating machines

Berler¹,

Blokhintsev²,

Golubev³

et al.

Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)

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“…Researchers have recently explored using RTD-type and thermocouple-type temperature detectors as PD sensors [3,4]. RTDs are typically installed in one or more slots per phase between the top and bottom coils in motor and generator stator windings in machines rated 3.3 kV and above.…”

Section: Introductionmentioning

confidence: 99%

Investigations Into the Use of Temperature Detectors as Stator Winding Partial Discharge Detectors

Campbell

Stone

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation

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This paper presents results from tests on eight stators as well as a laboratory model on the characteristics of partial discharge (PD) pulses detected by resistance temperature detectors (RTDs). It is clear from these experiments that the RTD leads -rather than the RTD element itself, primarily detects the PD signals. In addition, if the RTD lead is shielded, the detected signal is extremely small. Thus PD measurements should only be attempted with unshielded RTD leads. Unfortunately whether leads are shielded or unshielded is often unknown. The data also shows that even with unshielded RTD leads, the detected signals are usually uncorrelated with the PD measurement using conventional sensors, and thus the known condition of the stator winding. Although RTD leads may detect PD, interpretation of the results cannot be based on magnitude, polarity or phase position. Thus interpretation is extremely subjective -even by an experienced expert.

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Field experiences with the measurement of partial discharges on rotating equipment

Cited by 16 publications

References 2 publications

Simulation of Partial Discharge Propagation in Power Network

Simulation of Partial Discharge Propagation in Power Network

RTD as the valuable tool in partial discharge measurements on rotating machines

Investigations Into the Use of Temperature Detectors as Stator Winding Partial Discharge Detectors

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