On Investigating the Effect of DC Biased Ripple Voltages over the Insulation of Bus Capacitor of Power Inverters

Possibility and Limitations

verfasst von

Reza Sargazi, Peter Werle, Asghar Akbari, Andreas Apelsmeier

Abstract

With growing advances in semiconductor technologies and the introduction of new topologies in power networks, the implementation of power converters has dramatically increased. Such variations may impose additional electrical stresses and lead to failures in insulation systems. In this regard, understanding the behavior of insulation is of paramount importance. Conventionally, spectroscopy of insulations is performed under sinusoidal voltage waveforms, while there are certain conditions where the insulation is subjected to a non-sinusoidal voltage waveform with a possible DC bias. A good example of this situation could be the bus capacitor of power converters, where the capacitor on the DC voltage side provides a low-impedance loop for current ripple originating from the converter topology or load behavior. In this paper, the complex permittivity of the insulation was extracted under DC-biased sinusoidal and non-sinusoidal voltage waveforms. The challenges associated with such measurements have been addressed, and finally, the results over a typical sample are presented and discussed.

Organisationseinheit(en)

Fachgebiet Hochspannungstechnik und Asset Management (Schering-Institut)

Externe Organisation(en)

K.N. Toosi University of Technology
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU Erlangen-Nürnberg)

Typ

Artikel

Journal

IEEE Transactions on Dielectrics and Electrical Insulation

Band

31

Seiten

997-1002

Anzahl der Seiten

6

ISSN

1070-9878

Publikationsdatum

04.2024

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektrotechnik und Elektronik

Elektronische Version(en)

https://doi.org/10.1109/TDEI.2024.3350548 (Zugang: Geschlossen)