On-Line Digital Computer System for Measurementof Partial Discharges in Insulation Structures

Austin, J.; James, R.E.

doi:10.1109/tei.1976.297920

Cited by 41 publications

(6 citation statements)

References 6 publications

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“…Computer-aided digital PD pulse measurement systems have been developed to exhibit and to store numerous pulse data effectively [1]. Those stored data were compared with newly measured ones and gave important information for insulation diagnosis.…”

Section: Introductionmentioning

confidence: 99%

An integral equation for analyzing phase-resolved partial discharge characteristics under sinusoidal voltage waveform conditions

Okamoto

Takahashi

Miyazaki

et al. 2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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The authors have been developing a simple partial discharge model to analyze phase-resolved partial discharge characteristics such as ! ! -n characteristics. The simple model is simply based on the Whitehead's three-capacitance equivalent circuit model for partial discharges. The authors proposed an integral equation based on the fluctuation of delay time of each partial discharge inception. They already succeeded to obtain the solution of the integral equation at low voltage case, in which only one partial discharge can occur at a half cycle of an applied ac voltage with a triangular waveform and also with a sinusoidal waveform. The results have been published elsewhere. This paper describes the solutions of the integral equation for higher voltage conditions in which multi partial discharges can occur at the half cycle of a sinusoidal ac waveform. These solutions give basically pulse number distribution as a function of applied voltage phase angle, that is the ! -n characteristics. Those characteristics show good agreement with those obtained by Monte-Carlo simulation and also those obtained by experiments.

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Section: Introductionmentioning

confidence: 99%

An integral equation for analyzing phase-resolved partial discharge characteristics under sinusoidal voltage waveform conditions

Okamoto

Takahashi

Miyazaki

et al. 2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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“…(1),we substitute such x as (2) for ƒÑ in eq. (1).In this procedure we also can substitute (3) for f0 in eq.(1).Therefore,eq. (1)is reduced to such a form as (4) Equation (4)expresses a standard form of exponential distribution (25).An ERN x described in eq.…”

Section: Operation Principlementioning

confidence: 99%

Software Random Pulser in order to Simulate the Partial Discharge Pulses Observed in a Magnet Relay.

Igarashi

Funaki²,

Yukawa

et al. 1995

J. Soc. Mater. Eng. Resour. Jpn

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A software based random pulser operated on a personal computer is reported in this paper.A printer I/O port of the computer which removes completely a hardware burden is used as the outlet of the pulse train.The random pulser sends out pulses whose intervals obey an exponential distribution.Series of exponentially random numbers which govern the time intervals are provided by uniformly distributed pseudo random numbers generated by Turbo-C.The mean rate fo of a pulse train can be set at will.In addition,a time-dependent fo which follows a function fo(t)of t can also be furnished in the pulser.The maximum rate depends on the computer employed.With PC486HG(EPSON: i486DX2,50MHz),a maximum rate 9.1x104cps was achieved.

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“…Im Hinblick auf eine Vergrößerung der Durchgangsleistung elektroenergetischer Betriebsmittel und eine damit verbundene höhere Beanspruchung der Isolierungen gewinnt die elektrische Messung von Teilentladungs-Kenngrößen (TE-Messung) als Mittel zur Qualitätskontrolle und zur Diagnose von Schwachstellen zunehmend an Bedeutung [1; 2; 3], Es wird versucht, anhand gemessener TE-Signale kriterielle Informationen über die im Inneren der Isolierung ablaufenden Zerstörungsprozesse bezüglich Intensität und schädigender Wirkung zu erhalten [4; 5], Dabei hat die Messung der scheinbaren Ladung der TE-Vorgänge sowie damit verknüpfter Meßgrößen wie TE-Strom, TEEnergie, TE-Leistung besondere Bedeutung erlangt [6][7][8][9][10][11][12][13][14], Trotz der Entwicklung moderner elektronischer Meßsysteme und spezieller Meßverfahren, wie ζ. B. Phasenwinkelmessung, Impulshöhenanalyse, konnte noch keine eindeutige Korrelation zwischen einzelnen TEKenngrößen und dem durch die TE verursachten Zerstö-rungsgrad gefunden werden [15; 16; 17].…”

Section: Introductionunclassified

Simultane Erfassung und Verarbeitung von Teilentladungs-Kenngrößen zur Beurteilung elektrischer Isolierungen / Simultaneous registration and processing of partial discharge signals for the evaluation of electrical insulations

Kreuger¹,

Gulski²

1988

tm - Technisches Messen

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Schlagwörter: Elektrische Isolierungen, TeilentladungsKenngrößen, Meßwerterfassung, Meßwertverarbeitung, AutomatisierungDie TE-Messung hat als Mittel zur Beurteilung elektrischer Isolierungen in den letzten Jahren immer mehr an Bedeutung gewonnen. Zur besseren Deutung der im Inneren der Isolierung ablaufenden und im allgemeinen schädlichen TE-Prozesse ist man vor allem bei Grundlagenuntersuchungen bestrebt, möglichst viele Informationen aus den Messungen zu erhalten. So werden neben üblichen Meßgrößen, wie scheinbare Ladung, auch TE-Energie bzw. daraus abgeleitete Größen, wie TE-Strom und -Leistung, zur Bewertung herangezogen. Eine Erhöhung der Aussagekraft von TE-Messungen wird erwartet, wenn möglichst viele TEKenngrößen unter Berücksichtigung ihres stochastischen Charakters zeitgleich erfaßt und vielseitig bewertet werden.Discharge detection for evaluation of electric insulations has increasingly gained importance in the last years. In order to improve the interpretation of the discharge processes basic research goes in the direction of obtaining more and more information from discharge measurements. Not only the current magnitudes like apparent charge and discharge energy, but also the derivations of these magnitudes like discharge current, power dissipation, etc. are taken into account. As many characteristics as possible are registered at a time, having regard to their stochastic character, and are subsequently evaluated.

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On-Line Digital Computer System for Measurementof Partial Discharges in Insulation Structures

Cited by 41 publications

References 6 publications

An integral equation for analyzing phase-resolved partial discharge characteristics under sinusoidal voltage waveform conditions

An integral equation for analyzing phase-resolved partial discharge characteristics under sinusoidal voltage waveform conditions

Software Random Pulser in order to Simulate the Partial Discharge Pulses Observed in a Magnet Relay.

Simultane Erfassung und Verarbeitung von Teilentladungs-Kenngrößen zur Beurteilung elektrischer Isolierungen / Simultaneous registration and processing of partial discharge signals for the evaluation of electrical insulations

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