Hyungjin Choi


Hyungjin Choi, Ph.D.

Electrical Engineer

Contact Information

Hyungjin Choi, Ph.D. / (505) 313-9480


Hyungjin Choi received the Ph.D. degree in Electrical Engineering from University of Minnesota in 2017 focusing on convex optimization approaches for transient stability and uncertainty propagation in power systems. Before joining Sandia, he worked as a software engineer at Siemens Digital Grid on developing transmission network applications for energy management system and energy market management system products. From 2017-2018, he worked as a postdoctoral research associate at the University of Illinois, Urbana Champaign, on stability of a microgrid cybersecurity. He is currently serving as a senior member of technical staff in Energy Storage Technology and Systems group at Sandia National Laboratories, mainly focusing on modeling, optimization, and control of power system operation with energy storage systems.

Research Interests

Stability and uncertainty analysis of power systems with renewables and energy storage systems

Operator theoretic methods for data-driven analysis and control of nonlinear dynamical systems

Data-driven analytics for power grid and energy storage system operation and control


Ph.D. in Electrical and Computer Engineering, University of Minnesota

B.S. in Electrical and Electronics Engineering, INHA University, Incheon, South Korea

Google Scholar

Hyungjin Choi, Ph.D.

Key Publications

H. Choi, U. Vaidya, Y. Chen A convex data-driven approach for nonlinear control synthesis arXiv: 2006.15477, 2020.

H.J. Liu, H. Choi, P. Buason, A. Valdes Probabilistic bounds on the impact of potential data integrity attacks in microgrids Proceedings of the 52nd Hawaii International Conference on System Sciences, 2019, DOI: 10.24251/HICSS.2019.425.

P. Buason, H. Choi, A. Valdes, H.J. Liu “Cyber-Physical Systems of Microgrids for Electrical Grid Resiliency” 2019 IEEE International Conference on Industrial Cyber Physical Systems (ICPS), Taipei, Taiwan, 2019, pp. 492-497, DOI: 10.1109/ICPHYS.2019.8780336.

H. Choi, S. Bose Transient stability analysis of power systems using Koopman operators Preprint, 2018.

H. Choi, P.J. Seiler, S.V. Dhople Propagating uncertainty in power flow with the Alternating Direction Method of Multipliers IEEE Transactions on Power Systems, vol. 33, no. 4, pp. 4124-4133, July 2018, DOI: 10.1109/TPWRS.2017.2778050.