EECS&DSE Colloquium
Host: Jae-Woong Soh / Language: English
Thursday, November. 13, 2025, 16:00~
Haerim Hall, EECS-B Bldg. 1st Floor
Power Electronics as Enabling Technology for Medium Voltage DC Grids
Prof. Joon-Hee Lee
Department of Electrical Engineering, UNIST
[Abstract]
In this talk, I will introduce power electronics technology, especially for multilevel converter, which enables the Medium voltage DC grid in the modern power distribution system.
Medium-voltage DC (MVDC) can be viewed as acting in the same way as high-voltage DC (HVDC) systems in transmission grids, just on a smaller scale and over comparatively shorter distances or at a specific site.
Such MVDC systems allow much more flexible ways of grid operation beyond the scope of conventional AC systems by flexible power flow control, increased connection capacity on the same infrastructure compared with AC,
and voltage optimization, hence a more efficient use of grid resources.
[Short Biography]
Joon-Hee Lee is an assistant professor at the Department of Electrical Engineering at Ulsan National Institute of Science and Technology (UNIST).
Prior to joining UNIST, he was an assistant professor in KENTECH from 2022 to 2024, and a Senior Research Engineer at LG Electronics from 2021 to 2022.
He received the B.S. and Ph.D. degrees in electrical engineering from Seoul National University in 2015 and 2021, respectively.
His research interests focus on Power Electronics System, especially for electric machine drive, grid-connected converter, and HVDC/MVDC system.
