PROJECT TITLE: Stability of SiC-based Current Source Converters in Power Electronic System
PhD period: 2015.12.01 – 2018.11.30. (has been prolonged till 2019.05.31)
Section: Power Electronic Systems
Research Programmes: Efficient and Reliable Power Electronics and Electronic Power Grid Infrastructure
Supervisor: Frede Blaabjerg
Co-Supervisor: Xiongfei Wang and Claus Leth Bak
Funding: China Scholarship Council and the Department of Energy Technology, AAU.
The recent advances in semiconductor devices, as Silicon Carbide (SiC) power electronic semiconductors which provide high breakdown voltage, fast switching, low on-state resistance, and high temperature tolerance, help current source converter (CSC) to been considered in many applications such as renewable energy systems, high-voltage direct current transmission systems, motor drives. Moreover, CSC exhibits several features including easy regenerative capabilities, inherent short-circuit protection that make it attractive.
However, the CSC system may experience instability problems caused by the resonance from LC filter, grid-impedance and the interactions from others in a multiple system. This project will firstly study the design and control of the CSC. SiC power devices is an essential part of this period. Secondly, stability issues of the CSCs are to be researched. Damping methods both active and passive based on filters is a task and also the concept of active damper will be introduced to reshape the impedance in order to stabilizing CSCs system. Finally, hybrid system containing CSCs and VSCs is to be developed.
Publications in journals and conference papers may be found at VBN.