TY - JOUR

T1 - On Investigating the Effect of DC Biased Ripple Voltages over the Insulation of Bus Capacitor of Power Inverters

T2 - Possibility and Limitations

AU - Sargazi, Reza

AU - Werle, Peter

AU - Akbari, Asghar

AU - Apelsmeier, Andreas

PY - 2024/4

Y1 - 2024/4

N2 - 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.

AB - 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.

KW - bus capacitor

KW - Capacitors

KW - Current measurement

KW - dielectric spectroscopy

KW - Dielectrics

KW - Impedance

KW - Insulation

KW - Permittivity measurement

KW - ripple voltage

KW - variable speed drives

KW - Voltage measurement

KW - Bus capacitor

UR - http://www.scopus.com/inward/record.url?scp=85182374887&partnerID=8YFLogxK

U2 - 10.1109/TDEI.2024.3350548

DO - 10.1109/TDEI.2024.3350548

M3 - Article

AN - SCOPUS:85182374887

VL - 31

SP - 997

EP - 1002

JO - IEEE Transactions on Dielectrics and Electrical Insulation

JF - IEEE Transactions on Dielectrics and Electrical Insulation

SN - 1070-9878

IS - 2

ER -