Aspects of PD measurement in hybrid gaseous insulation at DC voltage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F16%3A43930799" target="_blank" >RIV/49777513:23220/16:43930799 - isvavai.cz</a>

Výsledek na webu

<a href="http://ieeexplore.ieee.org/document/7757976/" target="_blank" >http://ieeexplore.ieee.org/document/7757976/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/CMD.2016.7757976" target="_blank" >10.1109/CMD.2016.7757976</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Aspects of PD measurement in hybrid gaseous insulation at DC voltage

Popis výsledku v původním jazyce

The increased application of HVDC components in electrical energy systems has led to new challenges in diagnostic testing and measurement of electrical insulation. This paper deals with PD measurement on hybrid gaseous insulation at DC testing. Such insulation types are mostly characterized by the presence of insulating (solid) materials which become electrically charged, if an electric field is present within the insulation. For the study of such phenomena, a simple needle-plane electrode set with an insulating sheet was investigated at DC voltage with different polarities and electrical stress durations. It could be shown, that the charging process on the insulating sheet already takes place at test voltages below the measured PD inception voltage level. The charge intensity on that interface and, as a consequence, its impact on the electrical field conditions e.g. the inception field strength, depends both on polarity and applied voltage duration. It is assumed, that any charging process below the (self-sustaining) ionisation level, characterized by the electrical inception field strength, should be caused by natural ionisation processes which take place in the test object. This assumption was supported by different results obtained if the test set was under open- and closed- volume condition. In the same manner, the results obtained were confirmed by electrical field calculations for different charging conditions on the insulating sheet and applied voltage polarity. The results described in the paper lead to the main conclusion that the charging ability of interfaces in hybrid gaseous insulation must be considered if PD measurement at DC voltage should be performed.

Název v anglickém jazyce

Aspects of PD measurement in hybrid gaseous insulation at DC voltage

Popis výsledku anglicky

The increased application of HVDC components in electrical energy systems has led to new challenges in diagnostic testing and measurement of electrical insulation. This paper deals with PD measurement on hybrid gaseous insulation at DC testing. Such insulation types are mostly characterized by the presence of insulating (solid) materials which become electrically charged, if an electric field is present within the insulation. For the study of such phenomena, a simple needle-plane electrode set with an insulating sheet was investigated at DC voltage with different polarities and electrical stress durations. It could be shown, that the charging process on the insulating sheet already takes place at test voltages below the measured PD inception voltage level. The charge intensity on that interface and, as a consequence, its impact on the electrical field conditions e.g. the inception field strength, depends both on polarity and applied voltage duration. It is assumed, that any charging process below the (self-sustaining) ionisation level, characterized by the electrical inception field strength, should be caused by natural ionisation processes which take place in the test object. This assumption was supported by different results obtained if the test set was under open- and closed- volume condition. In the same manner, the results obtained were confirmed by electrical field calculations for different charging conditions on the insulating sheet and applied voltage polarity. The results described in the paper lead to the main conclusion that the charging ability of interfaces in hybrid gaseous insulation must be considered if PD measurement at DC voltage should be performed.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

—

Projekt

<a href="/cs/project/LO1607" target="_blank" >LO1607: RICE – Nové technologie a koncepce pro inteligentní průmyslové systémy</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

CMD 2016: International Conference on Condition Monitoring and Diagnosis : (proceedings)

ISBN

978-1-5090-3398-0

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

932-937

Název nakladatele

Piscataway

Místo vydání

IEEE

Místo konání akce

Xi'an, China

Datum konání akce

25. 9. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000390594000220