PhD defence by Haoran Wang on Capacitive DC links-Design, Control and Impact on the Reliability of Power Electronic Systems
15.10.2018 kl. 13.00 - 16.00
Haoran Wang, Department of Energy Technology, will defend the thesis "Capacitive DC links-Design, Control and Impact on the Reliability of Power Electronic Systems".
Capacitive DC links-Design, Control and Impact on the Reliability of Power Electronic Systems
Associate Professor Huai Wang
Associate Professor Pooya Davari
Associate Professor Dezso Sera, Dept. of Energy Technology, Aalborg University (Chairman)
Jih-Sheng Lai, Virginia Polytechnic Institute and State University, USA
António João Marques Cardoso, University Beira Interior, Portugal
Capacitive DC links are widely used in power electronic systems to balance the instantaneous power difference between the input source and output load, filter the harmonics, and minimize the voltage variation in the DC link. With more stringent reliability constrains brought by automotive, aerospace and energy industries, the design of DC links encounters huge challenges.
This project aims to evaluate the reliability of the capacitive DC links in power electronic systems quantitatively and then proposes optimization solutions to improve the reliability. The research is conducted from three aspects: 1) reliability evaluation of capacitors based on accelerated lifetime testing; 2) multi-objective optimization of passive capacitor banks considering reliability, efficiency and power density, and 3) novel two-terminal active impedance elements (active capacitor and active inductor) for high reliability, high efficiency and high power density. The outcomes of the PhD project include a “multi-objective optimization tool for capacitor banks” which is useful for practical design, and a “Two-terminal active impedance element” which aims to replace the passive capacitor and passive inductor in power electronic systems.
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ALL ARE WELCOME. THE DEFENCE WILL BE IN ENGLISH.
AFTER THE DEFENCE THERE WILL BE AN INFORMAL RECEPTION AT PONTOPPIDANSTRAEDE 111 IN ThE COFFEE ROOM.
Department of Energy Technology
Pontoppidanstræde 105, room 4.127