On Line Incipient ARC Detection in Large Turbine Generator Stator Winding

Emery, F.T.; Harrold, R. T.

doi:10.1109/tpas.1980.319853

Cited by 33 publications

(4 citation statements)

References 3 publications

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“…There are generator neutral to the neutral grounding transseveral methods available which aid in determining the former[2, 31. The other technique employs two high condition of the insulation: visual inspection; condition voltage capacitors per phase, mounted on the isolated monitoring[1]; RF monitoring [2,3]; and partial disphase bus (IPB)[5]. These two capacitors can be concharge testing.…”

Section: Methodsmentioning

confidence: 99%

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Propagation of Partial Discharge and Noise Pulses in Turbine Generators

Henriksen

Stone

Kurtz

1986

IEEE Trans. Energy Convers.

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Section: Methodsmentioning

confidence: 99%

“…Since the RF CT detection method is often used in It was possible to make contact to the copper at the frequency domain model [3], the frequency response several locations in a parallel in a winding similar to characteristics of the winding were investigated. Figure Machine A.…”

Section: Rf Current Transformer Detectionmentioning

confidence: 99%

Propagation of Partial Discharge and Noise Pulses in Turbine Generators

Henriksen

Stone

Kurtz

1986

IEEE Trans. Energy Convers.

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“…Despite these difficulties, efforts have been made to implement on-line PD monitoring in hydraulic and turbine generators. Primarily, these techniques are based on either temporarily installing capacitive couplers at the phase terminals [13], or permanent installation of a high frequency current transformer (CT) at the generator neutral [21]. However, each of these techniques requires considerable skill and experience on the part of the operator to separate the component of the signal which is due to the PD from noise pulses.…”

Section: Rotating Machine Applicationsmentioning

confidence: 99%

Practical implementation of ultrawideband partial discharge detectors

Stone

Sedding

Fujimoto

et al. 1992

IEEE Trans. Elect. Insul.

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Since the introduction of partial discharge (PD) testing four decades ago, the majority of conventional electrical measurements of PD is performed with detectors operating in the 10 kHz to 1 MHz range. In the past decade, advances in electronic instrumentation have permitted the measurement of PD with bandwidths up to 1 GHz. Since PD pulses are fundamentally events with durations as low as a few ns, PD measurements with such ultrawideband (UWB) detection methods can provide several benefits in certain situations. In particular, UWB detection can improve the fundamental signal-tonoise ratio, permitting reliable PD detection at 0.01 pC. Additionally, using the properties of electromagnetic wave propagation associated with ns duration current pulses, methods to eliminate external noise on a pulseby-pulse basis can be implemented with UWB detection. Finally, UWB detection of the PD current pulse can lead to greater fundamental understanding of the physical processes of PD in solid dielectrics. UWB detection has had an Important impact on PD measurements in gas-insulated switchgear insulating spacers and online generator stator winding PD tests. Examples of the application of UWB detection systems to these areas are presented.

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“…Since the RF CT detection method is often used in It was possible to make contact to the copper at the frequency domain model [3] …”

Section: Rf Current Transformer Detectionmentioning

confidence: 99%