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Partial discharge diagnostics on inverter-fed drives of electric vehicles = Teilentladungsdiagnostik an umrichtergespeisten Antrieben der Elektromobilität

Zajadatz, Maurizio ORCID iD icon 1; Wöhr, Erik 1; Suriyah, Michael 1; Leibfried, Thomas 1
1 Institut für Elektroenergiesysteme und Hochspannungstechnik (IEH), Karlsruher Institut für Technologie (KIT)

Abstract:

In this paper, the possibilities of partial discharge measurement at square-wave voltages are discussed. The focus is on low-voltage machines, such as those used in electric vehicles. An insight into common measurement methods is given. In this work, high-frequency current transformers and near-field probes are used as sensors. The generation of a realistic steep-edged test voltage according to IEC/TS 61934 is also discussed and demonstrated on an inverter with silicon carbide semiconductors.

Experiments are conducted to compare the sensors used. A direct comparison between cable-based sensors (HFCT) and antennas (near-field probes) is provided. Resonance points to open motor windings according to IEC/TS 60034-27‑5 and their significance for partial discharge measurement are also investigated. The results show that the high-frequency current transformers and the ball probe are able to detect PD even at steep voltage edges. Excitation with a fast voltage edge results in non-negligible overshoots in the overall system due to resonances. It can be shown that the partial discharges occur during these overvoltages.


Verlagsausgabe §
DOI: 10.5445/IR/1000164703
Veröffentlicht am 21.11.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Elektroenergiesysteme und Hochspannungstechnik (IEH)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 0932-383X, 1613-7620
KITopen-ID: 1000164703
Erschienen in e & i Elektrotechnik und Informationstechnik
Verlag Springer
Vorab online veröffentlicht am 25.10.2023
Nachgewiesen in Dimensions
Scopus
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