Repetitive Phenomena in Dielectrics

Treanor, M.; Laghari, J.R.; Hyder, A. K.

doi:10.1109/tei.1987.298918

Cited by 20 publications

(5 citation statements)

References 3 publications

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“…This time duration is referred to as the repetitive stressing time (RST). Generally, the number of applied pulses, with a microsecond or millisecond pulse width, can be counted using a digital counter or specially designed equipment with automated data acquisition and control functions [12,23]. In the experimental investigation, the number of applied pulses was calculated by measuring the time duration, t RST .…”

Section: Signal Measurementmentioning

confidence: 99%

“…Most research regarding short pulse breakdown is conducted using a single nanosecond pulse [2][3][4][5][6][7][8][9][10][11], while some investigations confirm that the breakdown with repetitive pulses is different from that of a single pulse [12][13][14][15][16]. In the field of fluid insulation breakdown, the effect of bubble formation and heat injection should be considered synthetically under repeated pulse conditions [12]. The breakdown strength of transformer oil is reduced greatly under repetitive subnanosecond pulses, and is likely due to the presence of residual charged species from previous pulses [13].…”

Section: Introductionmentioning

confidence: 99%

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An experimental investigation of repetitive nanosecond-pulse breakdown in air

Shao

Sun

Yan

et al. 2006

J. Phys. D: Appl. Phys.

105

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A compact, repetitive pulsed power system has many applications, but some basic aspects of the breakdown characteristics need further investigation. The purpose of this paper is to investigate the breakdown characteristics of dry air with repetitive nanosecond pulses. The variables affecting the discharge conditions, including the applied pulse voltage, pulse repetition frequency, gap distance and gas pressure, are investigated. The relationship between the breakdown time lag, the repetitive stressing time, and the number of applied pulses to breakdown with pulse repetition rate, E-field strength and pressure are obtained, and the breakdown characteristics and mechanism are also discussed. It is suggested that activated neutral species and residual ions should be taken into account, and repetitive nanosecond-pulse breakdown is characterized by the accumulation effect.

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Section: Signal Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An experimental investigation of repetitive nanosecond-pulse breakdown in air

Shao

Sun

Yan

et al. 2006

J. Phys. D: Appl. Phys.

105

View full text Add to dashboard Cite

show abstract

“…In the past several decades, the breakdown characteristics in gas, liquid or solid dielectrics under repetitive pulses had been investigated [9][10][11][12][13][14][15]. But the investigations on the spacer flashover in pressurized SF 6 were very limited.…”

Section: Introductionmentioning

confidence: 99%

Spacer flashover characteristics in SF<inf>6</inf> under repetitive nanosecond-pulses

Ran¹,

Wang²,

Wang³

et al. 2012

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC)

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Very Fast Transient Overvoltages (VFTO) might result in insulation failures inside or outside Gas Insulated Switchgears (GIS), and most of them are led to by the spacer flashovers in the light of operational experiences. To get a better understanding of the discharge process, an experimental study on spacer flashovers under nanosecond-pulses in compressed Sulphur Hexafluoride (SF 6 ) gases is presented. A solid-state pulse generator, SPG200N, is used to generate nanosecond-pulses with a rise time of 15 ns and a full width at half maximum of 30-40 ns. The pulse repetition frequency (PRF) varies from 1 Hz to 1 kHz. The material of spacer is epoxy resin, a common material as insulators in GIS. The test electrodes are brass parallel-plane electrodes, 80 mm in diameter, to simulate uniform field in GIS. In this research, the relations of flashover time lag with gas pressure and PRF are investigated. The experimental results show that the flashover time lag gradually rose with the increase of gas pressure under single shot and lower PRF.

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“…Generally, the pulse number can be counted by a counter connected with the trigger modulator. [6,14] In this case, the number of applied pulses can be calculated and it is about the product of TBD and PRF. For the case in Fig.…”

Section: Measurement Results and Discussionmentioning

confidence: 99%

Measurement and control for a repetitive nanosecond-pulse breakdown experiment in polymer films

et al. 2010

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In order to perform data acquisition and avoid unwanted over-current damage to the power supply, a convenient and real-time method of experimentally investigating repetitive nanosecond-pulse breakdown in polymer dielectric samples is presented. The measurement-acquisition and control system not only records breakdown voltage and current, and time-to-breakdown duration, but also provides a real-time power-off protection for the power supply. Furthermore, the number of applied pulses can be calculated by the product of the time-to-breakdown duration and repetition rate. When the measured time-to-breakdown duration error is taken into account, the repetition rate of applied nanosecond-pulses should be below 40 kHz. In addition, some experimental data on repetitive nanosecond-pulse breakdown of polymer films are presented and discussed.

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Repetitive Phenomena in Dielectrics

Cited by 20 publications

References 3 publications

An experimental investigation of repetitive nanosecond-pulse breakdown in air

An experimental investigation of repetitive nanosecond-pulse breakdown in air

Spacer flashover characteristics in SF<inf>6</inf> under repetitive nanosecond-pulses

Measurement and control for a repetitive nanosecond-pulse breakdown experiment in polymer films

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