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Statements

Subject Item
n2:RIV%2F49777513%3A23220%2F13%3A43918927%21RIV14-MSM-23220___
rdf:type
skos:Concept n8:Vysledek
dcterms:description
The partial discharge measurement is well introduced for quality and diagnostic testing of important asset components as large generators, rotating machines etc. Usually the measurement procedure is given by standards as IEC 60270, whereby the results are evaluated by measured magnitude of apparent charge QIEC. For measuring of this parameter QIEC some requirements of the measuring system must be fulfilled. In previous papers was shown that the magnitude of QIEC doesn't represent the pd behaviour in every circumstances depending on the type of discharge, pd activity, number of pd sources etc. In this paper is discussed the adequate problem to estimate the partial discharge (PD) behaviour of typical stator bar insulation. The investigations were performed using stator bar models based on mica insulation and epoxy resin with slot and end bar corona protection. For estimation of the PD behaviour the standardized parameter QIEC and derived quantities as repetition rate, PD current recommended by IEC were measured, additionally to that PRDP - and PSA pattern were recorded. The results show that the estimation of PD behaviour by the measured magnitude of QIEC only can lead to a misinterpretation of the PD behaviour depending on the testing parameter. One of the main reasons for that is the evidence of multiple PD sources in such insulation type mainly internal PD and gliding discharges. Therefore several PD mechanisms occur making a superposition of the measured signals. For a better interpretation the separation of the results including the identifying of the single PD sources seems to be necessary. One of the possibilities doing that could be the performing of PD measurement using different frequency range windows of the measuring system during the same test procedure. The results show the influence of different measurement conditions as well as the possibility for a better interpretation of the PD behaviour of such insulation type. The partial discharge measurement is well introduced for quality and diagnostic testing of important asset components as large generators, rotating machines etc. Usually the measurement procedure is given by standards as IEC 60270, whereby the results are evaluated by measured magnitude of apparent charge QIEC. For measuring of this parameter QIEC some requirements of the measuring system must be fulfilled. In previous papers was shown that the magnitude of QIEC doesn't represent the pd behaviour in every circumstances depending on the type of discharge, pd activity, number of pd sources etc. In this paper is discussed the adequate problem to estimate the partial discharge (PD) behaviour of typical stator bar insulation. The investigations were performed using stator bar models based on mica insulation and epoxy resin with slot and end bar corona protection. For estimation of the PD behaviour the standardized parameter QIEC and derived quantities as repetition rate, PD current recommended by IEC were measured, additionally to that PRDP - and PSA pattern were recorded. The results show that the estimation of PD behaviour by the measured magnitude of QIEC only can lead to a misinterpretation of the PD behaviour depending on the testing parameter. One of the main reasons for that is the evidence of multiple PD sources in such insulation type mainly internal PD and gliding discharges. Therefore several PD mechanisms occur making a superposition of the measured signals. For a better interpretation the separation of the results including the identifying of the single PD sources seems to be necessary. One of the possibilities doing that could be the performing of PD measurement using different frequency range windows of the measuring system during the same test procedure. The results show the influence of different measurement conditions as well as the possibility for a better interpretation of the PD behaviour of such insulation type.
dcterms:title
Partial Discharge Measurement on Stator Bar Insulation Partial Discharge Measurement on Stator Bar Insulation
skos:prefLabel
Partial Discharge Measurement on Stator Bar Insulation Partial Discharge Measurement on Stator Bar Insulation
skos:notation
RIV/49777513:23220/13:43918927!RIV14-MSM-23220___
n8:predkladatel
n9:orjk%3A23220
n3:aktivita
n12:S n12:P
n3:aktivity
P(ED2.1.00/03.0094), S
n3:dodaniDat
n17:2014
n3:domaciTvurceVysledku
n13:3081656 n13:3482294 n13:4023404
n3:druhVysledku
n16:D
n3:duvernostUdaju
n4:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
95408
n3:idVysledku
RIV/49777513:23220/13:43918927
n3:jazykVysledku
n18:eng
n3:klicovaSlova
partial discharges, rotating machines, discharge current, apparent charge, IEC 60270
n3:klicoveSlovo
n5:apparent%20charge n5:rotating%20machines n5:partial%20discharges n5:discharge%20current n5:IEC%2060270
n3:kontrolniKodProRIV
[54046C553751]
n3:mistoKonaniAkce
Seoul, Korea
n3:mistoVydani
Seoul
n3:nazevZdroje
ISH 2013 : proceedings : 18th International Symposium on High Voltage Engineering
n3:obor
n7:JA
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n21:ED2.1.00%2F03.0094
n3:rokUplatneniVysledku
n17:2013
n3:tvurceVysledku
Mráz, Petr Haller, Rainer Pihera, Josef
n3:typAkce
n22:WRD
n3:zahajeniAkce
2013-08-25+02:00
s:numberOfPages
6
n20:hasPublisher
Hanyang University
n15:isbn
978-89-86510-18-8
n19:organizacniJednotka
23220