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Mitigating the effect of series capacitance unbalance on the voltage reduction capability of an auxiliary CSI used as switching ripple active filter

Papadopoulos, Savvas; Klumpner, Christian; Rashed, Mohamed; Wheeler, Pat

Authors

Savvas Papadopoulos eexsp19@nottingham.ac.uk

Christian Klumpner christian.klumpner@nottingham.ac.uk

Mohamed Rashed eezmr1@exmail.nottingham.ac.uk

Pat Wheeler pat.wheeler@nottingham.ac.uk



Abstract

The use of series connected capacitors for high voltage applications has been proven to be beneficial for voltage stress reduction across power semiconductors. In a 3-phase grid any asymmetry in the value of the series capacitance may lead to significant variations in the voltage seen across the low voltage converter. This paper investigates the effects of an unbalanced set of series connected capacitors used to reduce the voltage stress across a three phase current source inverter (CSI) used as an active power filter and proposes a method to minimize the impact of unbalance on CSI voltage ratings. It is shown that through a proposed solution which adjusts the level of inverse sequence current component in the series capacitors, the reduced CSI voltage stress can be maintained for large capacitor unbalance and validated by simulation and experimental results.

Start Date Sep 18, 2016
Publication Date Feb 16, 2017
Peer Reviewed Peer Reviewed
ISBN 9781509007370
APA6 Citation Papadopoulos, S., Klumpner, C., Rashed, M., & Wheeler, P. (2017). Mitigating the effect of series capacitance unbalance on the voltage reduction capability of an auxiliary CSI used as switching ripple active filter. https://doi.org/10.1109/ECCE.2016.7855244
DOI https://doi.org/10.1109/ECCE.2016.7855244
Keywords Active power filter; Series Capacitor; Unbalance; Current Source Inverter
Related Public URLs http://www.ieee-ecce.org/
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information paper #1545

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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