Prof. Jung-Wook PARK
Yonsei University
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Academic Career Length
24Years (2003-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 April 2016 in Cancer Cell
Journal Article
JLJohn K. Lee
John K. LeeJPJohn W. Phillips
John W. Phillips
BSBryan A. Smith
Bryan A. Smith
Jung-Wook PARKTSTanya Stoyanova
Tanya Stoyanova
OWOwen N. Witte
Owen N. Witte +10
5 October 2018 in Science
Journal Article
Jung-Wook PARKJLJohn K. Lee
John K. LeeKSKatherine M. Sheu
Katherine M. SheuLWLiang Wang
Liang Wang
NBNikolas G. Balanis
Nikolas G. Balanis
OWOwen N. Witte
Owen N. Witte +8
Some (re)programming notes on cancer: Epithelial cancers develop resistance to targeted therapies in a number of different ways. Several cancer types do so by undergoing phenotypic conversion to a highly aggressive cancer called small cell neuroendocrine carcinoma (SCNC). Whether distinct cancer types accomplish this “reprogramming” through the same mechanism has been unclear. Park et al. show that the same set of oncogenic factors transforms both normal lung and normal prostate epithelial cells into SCNCs that resemble clinical samples (see the Perspective by Kareta and Sage). This convergence of molecular pathways could potentially simplify the development of new therapies for SCNC, which is currently untreatable. Science , this issue p. 91 ; see also p. 30
17 April 2012 in IEEE Transactions on Power Delivery
Journal Article
GSGum Tae Son
Gum Tae Son
HLHee-Jin Lee
Hee-Jin Lee
TNTae Sik Nam
Tae Sik Nam
YCYong-Ho Chung
Yong-Ho Chung
ULUk-Hwa Lee
Uk-Hwa Lee
Jung-Wook PARK +2
This paper presents design and control methods for fault-tolerant operations with redundant converter modules, one of the most prominent features in modular multilevel converter (MMC) topology. In fully implementing MMC functionalities, a nearest level control is applied as a low-switching modulation method. A dual sorting algorithm is newly proposed for effectively reducing the switching commutations of each power module as well as for voltage balancing control. Built upon these primary MMC topological and control features, its redundant operation is comprehensively investigated for fail-safe energy transfer. In particular, a novel spare process is proposed to handle an emergency situation when the number of faulty power modules exceeds the module redundancy. Since topological redundancy may cause the switching commutations of power modules in an arm to be unevenly distributed, a practical and effective mitigation measure is incorporated to keep the energy balance while avoiding the undesired switching stresses. Rigorous simulation studies for MMC and its application for high-voltage direct current are performed to demonstrate the validity and effectiveness of the proposed spare process under normal and emergency conditions.
1 July 2019 in Cancer Cell
Journal Article
NBNikolas G. Balanis
Nikolas G. Balanis
KSKatherine M. Sheu
Katherine M. Sheu
FEFavour N. Esedebe
Favour N. Esedebe
SPSaahil J. Patel
Saahil J. Patel
BSBryan A. Smith
Bryan A. Smith
TGThomas G Graeber
Thomas G Graeber +5
25 January 2016 in IEEE Transactions on Power Systems
Journal Article
MKMoses Kang
Moses Kang
KKKeonhui Kim
Keonhui Kim
EMEduard Muljadi
Eduard Muljadi
Jung-Wook PARKYKYong Cheol Kang
Yong Cheol Kang
This paper proposes a torque limit-based inertial control scheme of a doubly-fed induction generator (DFIG) that supports the frequency control of a power system. If a frequency deviation occurs, the proposed scheme aims to release a large amount of kinetic energy (KE) stored in the rotating masses of a DFIG to raise the frequency nadir (FN). Upon detecting the event, the scheme instantly increases its output to the torque limit and then reduces the output with the rotor speed so that it converges to the stable operating range. To restore the rotor speed while causing a small second frequency dip (SFD), after the rotor speed converges the power reference is reduced by a small amount and maintained until it meets the reference for maximum power point tracking control. The test results demonstrate that the scheme can improve the FN and maximum rate of change of frequency while causing a small SFD in any wind conditions and in a power system that has a high penetration of wind power, and thus the scheme helps maintain the required level of system reliability. The scheme releases the KE from 2.9 times to 3.7 times the Hydro-Québec requirement depending on the power reference.
1 January 2016 in IEEE Transactions on Sustainable Energy
Journal Article
MHMin Hwang
Min Hwang
EMEduard Muljadi
Eduard Muljadi
Jung-Wook PARKPSPoul Sorensen
Poul SorensenYKYong Cheol Kang
Yong Cheol Kang
If a large disturbance occurs in a power grid, two auxiliary loops for the inertial control of a wind turbine generator have been used: droop loop and rate of change of frequency (ROCOF) loop. Because their gains are fixed, difficulties arise in determining them suitable for all grid and wind conditions. This paper proposes a dynamic droop-based inertial control scheme of a doubly-fed induction generator (DFIG). The scheme aims to improve the frequency nadir (FN) and ensure stable operation of a DFIG. To achieve the first goal, the scheme uses a droop loop, but it dynamically changes its gain based on the ROCOF to release a large amount of kinetic energy during the initial stage of a disturbance. To do this, a shaping function that relates the droop to the ROCOF is used. To achieve the second goal, different shaping functions, which depend on rotor speeds, are used to give a large contribution in high wind conditions and prevent over-deceleration in low wind conditions during inertial control. The performance of the proposed scheme was investigated under various wind conditions using an EMTP-RV simulator. The results indicate that the scheme improves the FN and ensures stable operation of a DFIG.
About Me
Jung-Wook Park was born in Seoul, South Korea. He received a B.S. degree (summa cum laude) from the Department of Electrical Engineering, Yonsei University, Seoul, in 1999, and M.S.E.C.E. and Ph.D. degrees from the School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA, in 2000 and 2003, respectively. From 2003 to 2004, he was a Postdoctoral Research Associate with the Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, USA. Since 2005, he has been with the School of Electrical and Electronic Engineering, Yonsei University, where he is currently a Professor. He is also Director of the Yonsei-Power System Research Center of Great Energy Transition (Yonsei-PREFER) supported by the leading research program (with the USD 7.2M grant for nine years, during 2020–2029) of the National Research Foundation (NRL), South Korea. His current research interests include power system dynamics, energy management systems, renewable energies-based distributed generation systems, operation and planning of microgrid, and hardware implementation of power-electronic based inverters. He was a recipient of the Young Scientist Presidential Award from the Korean Academy of Science and Technology (KAST), South Korea, in 2013.