Measuring partial discharges under pulsed voltage conditions

Guastavino, F.; Dardano, A.; Torello, E.

doi:10.1109/tdei.2008.4712668

Cited by 52 publications

(36 citation statements)

References 16 publications

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“…Such quantities can be used to calculate a parameter, called average apparent charge per cycle [12], defined by the following equation: The different shapes of the PD patterns relevant to conventional and nanocomposite enamel are linked to different q a vs. time plots: examples are shown in Fig. 5 and 6 considering first the polyamide-imide (1200 V 500 Hz sinusoidal voltage) and then the nanocomposite polyamide imide enamel (1650 V 500 Hz sinusoidal voltage).…”

Section: B Pd Acquisition At 500 Hzmentioning

confidence: 99%

Partial discharge measurements during the degradation of nanocomposite twisted pair specimens

Guastavino

Squarcia

Torello

2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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Several electrical aging tests have been carried out on twisted pair specimens prepared by winding wires having conventional or nanostructured enamel insulation. The conventional enamel is polyamide-imide, while the nanostructured enamel is a polyamide imide -silica nanocomposite. The tests have been performed applying sinusoidal voltage at two different frequencies. The partial discharge (PD) signals acquired during the aging tests have been post-processed to define, in the case of the conventional enamel, a reliable parameter useful to implement an empirical prediction model. In this way, after a short PD activity monitoring time, the residual duration of twisted pair specimens can be computed.

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Section: B Pd Acquisition At 500 Hzmentioning

confidence: 99%

Partial discharge measurements during the degradation of nanocomposite twisted pair specimens

Guastavino

Squarcia

Torello

2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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“…Numerous works have been done in the past on partial discharge (PD) experiment in dielectric materials under impulse voltage [1][2][3][4][5]. Under impulse and AC voltages, a study on PD mechanism in a silicone gel using point plane geometry was studied in [1].…”

Section: Introductionmentioning

confidence: 99%

“…Comparison between a high frequency ultra wide band and (HFUWB) low frequency selective wide band (LFSWB) PD detection systems was performed to study PD under impulse voltage, which replicates a switching device output [4]. The work reported that the HFUWB systems are unable to yield right information on the severity of the degradation and the PD intensity.…”

Section: Introductionmentioning

confidence: 99%

Experiment and modeling of void discharges within dielectric insulation material under impulse voltage

Illias

Tunio

Mokhlis

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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The presence of cavity in motor insulation fed by variable speed drive is one of the sources of partial discharge (PD) occurrence, especially under impulse voltage. This is a serious problem as PD can accelerate degradation of the motor insulation. Therefore, it is important to prevent void discharges from occurring in motor insulation under impulse voltage. In this work, the characteristics of void discharges within dielectric insulation material under impulse voltage were investigated through experiment and modeling. The test object consists of a rectangular void within a polyethylene material. The test object was stressed with different peak magnitude, front time and tail time of the applied impulse voltage. The experimental results were reproduced by simulation results from a void discharge model in insulation material. From the model that was developed, a better understanding on physical parameters that influence the characteristics of void discharges within dielectric material under impulse voltage can be attained.Index Terms -Partial discharge, electrical insulation, dielectric material, high voltage engineering.

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“…Although various technologies have been proposed [3,4], detection in the UHF range is preferable because of high signal-to-noise ratio (SNR) [5].…”

Section: Introductionmentioning

confidence: 99%

The influence of square voltage rise time on partial discharge spectra

Wang

Cavallini

Montanari

2012

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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Literature data regarding the behavior of partial discharge inception voltage (PDIV) under repetitive impulsive voltage waveforms is contradictory. Some authors have found that rise time can lower PDIV, others just the opposite. The picture complicates further when repetitive PDIV (RPDIV) is discussed. In many papers, antenna sensor working in the UHF range were used, but no standardized sensors (and setup geometry) is defined yet. Therefore, if some parameters of the supply waveform could affect partial discharge spectra, that could be one of the possible reasons for the differences reported in literature. In this paper, experiments carried out on crossed pairs subjected to square voltages, aimed at inferring the dependence of rise time on partial discharge pulse spectra, are discussed. The results show that shorter rise times favor the inception of pulses having large magnitude and frequency content. As a consequence, depending on the bandwidth of the sensor-detector chain, PD detection sensitivity can vary with rise time, thus affecting PDIV measurement.

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Measuring partial discharges under pulsed voltage conditions

Cited by 52 publications

References 16 publications

Partial discharge measurements during the degradation of nanocomposite twisted pair specimens

Partial discharge measurements during the degradation of nanocomposite twisted pair specimens

Experiment and modeling of void discharges within dielectric insulation material under impulse voltage

The influence of square voltage rise time on partial discharge spectra

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