Streaming Electrification Phenomenon of Electrical Insulating Oils for Power Transformers

The subject matter of this study was the problem of the ECT (electrostatic charging tendency) of mineral insulation oils during their flow. The electrostatic charges generated may lead to partial discharges, and as a consequence, to the breakdown of a power transformer insulation system. In this stu...

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Published inEnergies (Basel) Vol. 13; no. 12; p. 3225
Main Author Zdanowski, Maciej
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2020
Subjects
Aluminum
Cellulose
electrical insulation
Flow velocity
insulation aging
insulation diagnostics
Laboratories
Mineral oils
power transformers
Reynolds number
streaming electrification
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Summary:The subject matter of this study was the problem of the ECT (electrostatic charging tendency) of mineral insulation oils during their flow. The electrostatic charges generated may lead to partial discharges, and as a consequence, to the breakdown of a power transformer insulation system. In this study, the results of the ECT of mineral oils used in transformers were compared. The method of streaming electrification of insulation liquids using a flow-through system was used. The influence of flow speed, temperature, and the pipe material on the values of the electrification current and volume charge density qw were analyzed. The results obtained in this study should be taken into account regarding the operation of power transformers.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1996-1073
1996-1073
DOI:10.3390/en13123225