AAU logo

Shen, Zhan

Shen, Zhan

PROJECT TITLE: Design and Reliability of Magnetic Components of Power Electronic Converters

PhD period: 2017.02.15 – 2020.02.14.
Section: Power Electronic Systems
Research Programme: Efficient and Reliable Power Electronics
Supervisor: Huai Wang
Co-Supervisor: Frede Blaabjerg
Contact Information

Funding: China Scholarship Council (CSC), Center of Reliable Power Electronics (CORPE).


In modern electric energy system, power electronic converters play a key role in providing an efficient and reliable solution for the generation, transport and storage of electricity. Combining the new high-power semiconductor devices and medium/high frequency (MF/HF) transformers, the new conversion element with power electronics structures is also called Power Electronic Transformer (PET). They can provide not only voltage adaptation and isolation functions, but also the additional features like power flow regulation, power quality improvement. Although PET provide interesting advantages over conventional solutions, currently its application in high power range still faces several main changes:

1) high efficiency requirements

2) high robustness and reliability levels

3) further development of key components

Nowadays the related research is focused on two main aspects: converter and transformer optimization. As the most valuable component in PET, both the design and reliability of the power transformer are important for the character of the total system. Contrary to the conventional available method and magnetic components for standard line-frequency transformers, the design and analysis of MF transformers for PETs highly depend on dedicated optimization for particular topology.

Therefore, starting from the practical demands for the development of modern electric grids, this project focuses on the optimization design, robustness and reliability of MF power transformers for PETs. Special attention will be paid on the accurate modeling of loss, thermal and lifetime concepts, and the influence of applications of new magnetic and conductor materials. At last, the analytical model and design method for MF transformers share similarities with other magnetic components such as power inductors, this study could be easily applied to the latter situations.


Publications in journals and conference papers may be found at VBN.