Chinese Journal of Electrical Engineering ›› 2018, Vol. 4 ›› Issue (3): 13-20.

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Active Thermal Control for Delaying Maintenance of Power Electronics Converters

Markus Andresen*, Johannes Kuprat, Vivek Raveendran, Johannes Falck, Marco Liserre   

  1. Christian-Albrechts-Universität zu Kiel, Kiel, Germany
  • Online:2018-09-25 Published:2019-10-31
  • Contact: * , E-mail:ma@tf.uni-kiel.de.
  • About author:Markus Andresen (S’15-M’17) received the M.Sc. degree in electrical engineering and business administration in 2012 and the Ph.D degree in 2017 from the chair of power electronics at Christian-Albrechts-Unversität zu Kiel, Germany. In 2010, he was an intern in the Delta Shanghai Design Center at Delta Electronics (Shanghai) Co., Ltd., China and in 2017 he was a visiting scholar at the University of Wisconsin-Madison, USA. His current research interests include control of power converters and reliability in power electronics. Vivek Raveendran received the B.Tech. degree in electrical and electronics engineering from the College of Engineering Trivandrum, Thiruvananthapuram, India, in 2011, and the M.Sc. degree in electrical engineering (with excellence) from RWTH Aachen, Aachen, Germany, in 2016. He is currently working towards the PhD degree at University of Kiel, Kiel, Germany. His research interests include smart transformers, control of modular converters, a nd reliability analysis of power converters. Johannes Falck (S'15) received the M.Sc. degree in Electrical and Information Engineering from Kiel University, Germany, in 2015. Afterwards he began a PhD at Kiel University in junction temperature control of power semiconductor devices connected to electric drives to improve lifetime. His research interests include reliability in power electronics, active thermal control, finite control set model predictive control, induction motor control, model-based junction temperature estimation and accelerated lifetime tests. Marco Liserre(S'00-M'02-SM'07-F'13) received the MSc and PhD degree in Electrical Engineering from the Bari Polytechnic, respectively in 1998 and 2002. He has been Associate Professor at Bari Polytechnic and Professor at Aalborg University (Denmark). He is currently Full Professor and he holds the Chair of Power Electronics at Christian- Albrechts-University of Kiel (Germany). He has published over 300 technical papers (more than 100 of them in international peer-reviewed journals) and a book. These works have received more than 25000 citations. Marco Liserre is listed in ISI Thomson report “The world’s most influential scientific minds”. He is member of IAS, PELS, PES and IES. He has been serving all these societies in different capacities and he has received 5 IEEE awards and 2 paper awards.

Abstract: Several studies have reported about power semiconductors and capacitors being the most sensitive components in power converters. The lifetime of these devices is associated with the mission profile and the resulting temperature profile. For preventing failures, it is of interest to estimate the Remaining Useful Lifetime(RUL) and several condition monitoring methods have been proposed for this purpose. Moreover, modular power converters consist of a high number of components and methods have been proposed to reduce the thermal stress and therefore extend the lifetime of a system with software, referred to as active thermal control. For power converters with limited accessibility, the RUL detected by the condition monitoring system may not fit to the scheduled maintenance of the system and devices may still have a significant RUL when their replacement is scheduled. Therefore, this work proposes to control the stress of the most deteriorated components in the system such that the failure probability of multiple building blocks is equalized when the next maintenance is scheduled. Moreover, this concept is proposed to extend the time to the next maintenance and reduce the number of maintenance instances without affecting the mean lifetime of the system.

Key words: Power electronics, reliability, condition monitoring, active thermal control, prognostic maintenance