IEEE Working Group on Modern and Future Distribution System Planning, A framework to identify and map uncertainties in distribution system planning, Tech. Rep. PES-TR129, Jun. 2025.
A. P. S. Meliopoulos, Y. Liu, S. Choi, and G. J. Cokkinides, Protection, control, and operation of microgrids, in Advances in Electric Power and Energy: Static State Estimation, 1st ed., M. E. El-Hawary, Ed. Hoboken, NJ, USA: Wiley, Mar. 2021, ch. 5, pp. 123-169.
J. Y. Lee, J. T. Lee, B. K. Seo*, M. S. Bae, Y. Moon, H. Choi, Y. Yoon, and S. Choi, Energy sustainability of breast ultrasound: Comparison of automated and handheld ultrasound systems, Ultrasonography, Jul. 2026.
X. Zhang, Z. Pan, and S. Choi*, Interval analysis based coordinated dispatch of battery energy storage systems and flexible loads for distribution systems considering extreme operating scenarios, Renewable Energy, vol. 258, p. 125001, Feb. 2026.
H. Woo, Y. Yoon, X. Zhang, J. Cho, and S. Choi*, Optimal electrolyzer placement strategy via probabilistic voltage stability assessment in renewable-integrated distribution systems, Sustainability, vol. 17, no. 24, p. 11027, Dec. 2025.
K. Lee, M. Yoon, J. Lee, S. Gham, and S. Choi*, Impact of short circuit ratio on harmonic distortion in offshore wind farm integration, Energies, vol. 18, no. 20, p. 5480, Oct. 2025.
J. Lee, M. Jung, S. Yun*, and S. Choi, Safety analysis of thermal runaway in LTO battery cells under operational fault conditions in railway vehicles, Scientific Reports, vol. 15, no. 1, p. 31671, Aug. 2025.
S. Kim, Y.-J. Kim, and S. Choi*, The development of a MATLAB/Simulink-SCADA/EMS-integrated framework for microgrid pre-validation, Energies, vol. 18, no. 11, p. 2739, May 2025.
S. Kim, Y. Son, H. Woo, X. Zhang, and S. Choi*, A pricing strategy for key customers: A method considering disaster outage compensation and system stability penalty, Sustainability, vol. 17, no. 10, p. 4506, May 2025.
B. Shin, C. Kim, H. Lee, and S. Choi*, Design and validation of a SiC-based single-to-three-phase converter for low-voltage distribution systems, Applied Sciences, vol. 15, no. 10, p. 5590, May 2025.
Y.-J. Kim, M. Kang, H.-T. Kim, H. Kim, S. Choi*, and B.-B. Choi*, Selecting an installation site for MW-scale water electrolysis systems based on grid voltage stability, Energies, vol. 18, no. 8, p. 2037, Apr. 2025.
M. Yoon, X. Zhang, and S. Choi*, Strategic intentional islanding method considering temporary overvoltage in disaster situations, International Journal of Electrical Power & Energy System, vol. 165, p. 110488, Apr. 2025.
Y. Yoon, M. Yoon, X. Zhang, and S. Choi*, Safe deep reinforcement learning-based real-time operation strategy in unbalanced distribution system, IEEE Transactions on Industry Applications, vol. 60, no. 6, pp. 8273-8283, Nov.-Dec. 2024.
H. Kim, H. Woo, Y. Yoon, H.-T. Kim, Y. J. Kim, M. Kang, X. Zhang, and S. Choi*, An enhanced continuation power flow method using hybrid parameterization, Sustainability, vol. 16, no. 17, p. 7595, Sep. 2024.
B. Shin, H. Lee, and S. Choi*, Analysis of underground distribution system models for secondary substations, Energies, vol. 17, no. 17, p. 4345, Aug. 2024.
J. Su, R. Zhang, P. Dehghanian*, M. H. Kapourchali, S. Choi, and Z. Ding, Renewable-dominated mobility-as-a-service framework for resilience delivery in hydrogen-accommodated microgrids, International Journal of Electrical Power & Energy System, vol. 159, p. 110047, Aug. 2024.
Y. Son, H. Woo, J. Noh, P. Dehghanian, X. Zhang*, and S. Choi*, Optimization of energy storage scheduling considering variable-type minimum SOC for enhanced disaster preparednesss, Journal of Energy Storage, vol. 93, p. 112366, Jul. 2024.
J. Yoo, Y. Son, M. Yoon, and S. Choi*, A wind power scenario generation method based on copula functions and forecast errors, Sustainability, vol. 15, no. 23, p. 16536, Dec. 2023.
J. Noh, S. Gham, M. Yoon, W. Chae, W. Kim, and S. Choi*, Enhanced non-communication-based protection coordination and advanced verification method using fault impedance in networked distribution systems, Sustainability, vol. 15, no. 21, p. 15593, Nov. 2023.
J. Noh, S. Gham, M. Yoon, W. Chae, W. Kim, and S. Choi*, A study on a communication-based algorithm to improve protection coordination under high-impedance fault in networked distribution systems, Sustainability, vol. 15, no. 21, p. 15399, Oct. 2023.
X. Zhang, H. Woo, and S. Choi*, An interval power flow method for radial distribution systems based on hybrid second-order cone and linear programming, Sustainable Energy, Grids and Networks, vol. 36, p. 101158, Dec. 2023.
Y. G. Son, S. Choi, M. A. Aquah, and S.-Y Kim*, Systematic planning of power-to-gas for improving photovoltaic acceptance rate: Application of the potential RES penetration index, Applied Energy, vol. 349, p. 121611, Nov. 2023.
Y. Son, X. Zhang, Y. Yoon, J. Cho, and S. Choi*, LSTM–GAN based cloud movement prediction in satellite images for PV forecast, Journal of Ambient Intelligence and Humanized Computing, vol. 14, no. 9, pp. 12373-12386, Sep. 2023.
H. Woo, Y. Son, J. Cho, S.-Y. Kim, and S. Choi*, Optimal expansion planning of electric vehicle fast charging stations, Applied Energy, vol. 342, p. 121116, Jul. 2023.
M. Yoon, N. Cho, and S. Choi*, Analysis of temporary overvoltage due to inverter-based distributed generation in networked distribution systems, Applied Energy, vol. 341, p.121059, Jul. 2023.
X. Zhang, D. Shin, Y. Son, H. Woo, S.-Y. Kim, and S. Choi*, Three-stage flexibility provision framework for radial distribution systems considering uncertainties, IEEE Transactions on Sustainable Energy, vol. 14, no. 2, pp. 948-961, Apr. 2023.
H. Noh, H. Cho, S. Choi, and B. Lee*, Mitigating subsynchronous torsional interaction using geometric feature extraction method, Sustainability, vol. 14, no. 23, p. 16110, Dec. 2022.
X. Zhang, D.-J. Kang, and S. Choi*, Evaluation of false data injection attacks on automatic generation control considering wind power dynamics, International Journal of Electrical Power & Energy Systems, vol. 143, p. 108400, Dec. 2022.
N. Cho, M. Yoon, and S. Choi*, Impact of transformer topology on short-circuit analysis in distribution systems with inverter-based distributed generations, Sustainability, vol. 14, no. 15, p. 9781, Aug. 2022.
H. Woo, Y. Son, J. Cho, and S. Choi*, Stochastic second-order conic programming for optimal sizing of distributed generator units and electric vehicle charging stations, Sustainability, vol. 14, no. 9, p. 4964, Apr. 2022.
Y. Son, Y. Yoon, J. Cho, and S. Choi*, Cloud cover forecast based on correlation analysis on satellite images for short-term photovoltaic power forecasting, Sustainability, vol. 14, no. 8, p. 4427, Apr. 2022.
J. Lee, W. Chae, W. Kim, and S. Choi*, Control strategy for line overload and short circuit current of networked distribution systems, Sustainability, vol. 14, no. 7, p. 4208, Apr. 2022.
M. Lee, M. Yoon, J. Cho, and S. Choi*, Probabilistic stability evaluation based on confidence interval in distribution systems with inverter-based distributed generations, Sustainability, vol. 14, no. 7, p. 3806, Mar. 2022.
X. Zhang, Y. Son, and S. Choi*, Optimal scheduling of battery energy storage systems and demand response for distribution systems with high penetration of renewable energy sources, Energies, vol. 15, no. 6, p. 2212, Mar. 2022.
X. Zhang, Y. Son, T. Cheong, and S. Choi*, Affine-arithmetic-based microgrid interval optimization considering uncertainty and battery energy storage system degradation, Energy, vol. 242, p. 123015, Mar. 2022.
H. Woo, D. Shin, J. Cho, and S. Choi, Electric vehicle charging station placement framework: Scenario generation, impact assessment, and placement, in Proceedings on International Conference on Electricity Distribution (CIRED) 2025, Geneva, Switzerland, Jun. 2025.
M. Yoon, J. Jeong, and S. Choi, Intentional islanding method with temporary overvoltage analysis, in Proceedings on International Conference on Electricity Distribution (CIRED) 2024 Chicago Workshop, Chicago, IL, USA, Nov. 2025.
Y. Jung, S. Kang, K. Kim, H. Woo, S. Choi, and G. Jang, Transient stability data driven special protection scheme using deep reinforcement learning, in Proceedings on 13th IEEE International Conference on Renewable Energy Research and Applications (ICRERA), Nagasaki, Japan, Nov. 2024.
Y. Yoon, J. Jang, M. Yoon, X. Zhang, and S. Choi, Deep reinforcement learning-based mitigation of subsynchronous oscillation due to inverter-based resources in weak grids, in Proceedings on 2024 IEEE Industry Applications Society (IAS) Annual Meeting, Phoenix, AZ, USA, Oct. 2024.
H. Woo, S. Choi, S. Kim, S. Kim, and J. Kwak, Hybrid AC/DC transmission expansion planning considering offshore windfarms in Korea, in Proceedings on 2024 IEEE Power & Energy Society General Meeting (PESGM), Seattle, WA, USA, Jul. 2024.
Y. Yoon, Y. Son, and S. Choi, Deep reinforcement learning-based operation strategy for high resilience distribution system, in Proceedings on International Conference on Electricity Distribution (CIRED) 2024 Vienna Workshop, Vienna, Austria, Jun. 2024.
Y. Yoon, M. Yoon, and S. Choi, Safe deep reinforcement learning-based real-time operation strategy in unbalanced distribution system, in Proceedings on 2023 IEEE Industry Applications Society (IAS) Annual Meeting, Nashville, TN, USA, Oct. 2023.
H. Woo, Y. Son, and S. Choi, Optimal scheduling model for renewable energy source-assisted electric and hydrogen vehicle charging station in HPS market, in Proceedings on 2023 IEEE Power & Energy Society General Meeting (PESGM), Orlando, FL, USA, Jul. 2023.
J. Cho, H. Kim, H. Ryu, J. Lee, J. Kim, Y. Son, and S. Choi, A study of mid-to long-term distribution planning based on PV installation forecasting, in Proceedings on the 27th International Conference on Electricity Distribution (CIRED), Rome, Italy, Jun. 2023.
Y. Son, H. Woo, and S. Choi, A study on the application of game theory for optimal operation of electric vehicle charging station, in Proceedings on the 13th International Conference on Information and Communication Technology Convergence (ICTC), Jeju, South Korea, Oct. 2022.
J. Noh, W. Chae, W. Kim, and S. Choi, A study on meshed distribution system and protection coordination using HILS system, in Proceedings on the 13th International Conference on Information and Communication Technology Convergence (ICTC), Jeju, South Korea, Oct. 2022.
Y. Yoon, and S. Choi, Application of reinforcement learning to operate the unbalanced distribution system, in Proceedings on the 13th International Conference on Information and Communication Technology Convergence (ICTC), Jeju, South Korea, Oct. 2022.
H. Woo, Y. Son, and S. Choi, EV charging demands and problem formulation for the optimization of the hydrogen-integrated electric vehicle charging station: a review, in Proceedings on the 13th International Conference on Information and Communication Technology Convergence (ICTC), Jeju, South Korea, Oct. 2022.
D. Shin and S. Choi, Non-communication protection scheme for meshed distribution systems using a new time-current-voltage characteristic, in Proceedings on the 13th International Conference on Information and Communication Technology Convergence (ICTC), Jeju, South Korea, Oct. 2022.
PENDING
S. Choi and H. Woo, Method and apparatus for optimally operating hydrogen and electric vehicle charging station by considering HPS market, PCT/KR2024/095865, May 30 (pending).
S. Choi and Y. Yoon, Device and method for resolving voltage imbalance in power distribution system on basis of reinforcement training model considering physical constraints, PCT/KR2024/002677, Feb. 29, 2024 (pending).
S. Choi, H. Woo, and Y. Son, Method for selecting optimal location for electric vehicle charging station for charging load balancing, PCT/KR2023/000106, Jan. 3, 2023 (pending).
FILED
S. Choi and H. Woo, Device and method for optimal scheduling for electric and hydrogen vehicle charging station in hydrogen portfolio standard market (HPS 시장을 고려한 수소 및 전기차 충전소의 최적 운영 방법 및 장치), Korea Patent 10-2906862, Dec. 29, 2025.
S. Choi and Y. Son, Device and method for operating electrical vehicle charging station based on game theory (게임 이론 기반 전기차 충전소 운영 방법 및 장치), Korea Patent 10-2890074, Nov. 19, 2025.
S. Choi and Y. Yoon, Physics-informed reinforcement learning model for compensating unbalanced voltage in the distribution system (물리적 제약을 고려한 강화학습 모델 기반 배전계통 내 전압불평형 해소 장치 및 방법), Korea Patent 10-2875878, Oct. 21, 2025.
S. Choi, Y. Son, B. Lee, G. Jang, and S. Joo, A new TSO-DSO coordination framework under high penetration levels of renewable energy sources (재생에너지 보급 증가 환경에서의 송전계통운영 및 배전계통운영 협조 방법), Korea Patent 10-2810194, May 15, 2025.
S. Choi, J. Im, and Y. Yoon, Device and method for parameter estimation of transformer frequency response model using machine learning (기계학습을 이용한 변압기 주파수 응답 모델 파라미터의 추정 장치 및 방법), Korea Patent 10-2810195, May 15, 2025.
S. Choi and J.-W. Lee, Device and method for protecting distribution system using impedance relay (임피던스 계전기를 이용한 배전 계통의 고장 검출 보호 장치 및 방법), Korea Patent 10-2767417, Feb. 10, 2025.
S. Choi, Y. Yoon, J. Im, and G. Jang, Optimization method to compensate unbalanced voltage for control active power and reactive power (배전 계통 내 인버터 기반 분산형 전원의 유효 전력 및 무효 전력 출력 제어를 통한 전압 불평형 해소 최적화 방법), Korea Patent 10-2690962, Jul. 29, 2024.
S. Choi, H. Woo, and Y. Son, Method of optimal placement of electric vehicle charging station for charging demand dispersion (충전 부하 분산을 위한 전기자동차 충전소 최적 위치 선정 방법), Korea Patent 10-2674216, Jun. 5, 2024.
S. Choi and Y. Son, Apparatus and method for predicting of energy generation (발전량 예측 장치 및 방법), Korea Patent 10-2526503, Apr. 24, 2023.
S. Choi, Y. Son, Y. Yoon, and E. Hong, Device and method for forecasting renewable energy generation using ensemble machine learning (앙상블 기계학습 방법을 이용한 재생 에너지 발전량 예측 장치 및 방법), Korea Patent 10-2361007, Feb. 4, 2022.
S. Choi and J. Lee, Intelligent equipment protection method based on dynamic state estimation (동적상태추정 기반 지능형 산업기기 보호 방법), Korea Patent 10-2026926, Sep. 24, 2019.
PENDING
S. Choi, C. Kim, and Y. Yoon, Device and method for locating oscillation sources in power systems based on waveform measurement unit data using the dissipating energy flow method (WMU 데이터 기반 DEF 알고리즘을 이용한 계통 내 진동원 위치 추정 장치 및 방법), Korea Patent 10-2025-0158605, Oct. 29, 2025 (pending).
S. Choi and Y. Yoon, Reinforcement learning-based auxiliary damping control apparatus and method for mitigating power system oscillations (전력계통 진동 완화를 위한 강화학습 기반 보조 댐핑 제어 장치 및 그 제어 방법), Korea Patent 10-2025-0099546, Jul. 23, 2025 (pending).
S. Choi and Y. Son, Device and method for GAN-based synthetic data generation for enhancing deep learning classification performance (딥러닝 분류 모델 성능 개선을 위한 GAN 기반 합성 데이터 생성을 위한 장치 및 방법), Korea Patent 10-2025-0095226, Jul. 15, 2025 (pending).
S. Choi and S. Gham, Device and method for a series arc fault and high impedance fault detection in low-voltage direct current system (저압직류계통의 직렬 아크 고장 및 고저항 고장의 탐지 및 보호를 위한 장치 및 방법), Korea Patent 10-2025-0035258, Mar. 19, 2025 (pending).
S. Choi and J. Joon, Device and method for hybrid control for mitigation of IBR SSO considering optimized control parameters (제어 파라미터 최적화 적용 하이브리드 제어를 통한 인버터 기반 자원 진동 완화 장치 및 방법), Korea Patent 10-2025-0029581, Mar. 7, 2025 (pending).
S. Choi and M.-S. Yoon, Distribution system reactor for mitigating flicker, Korea Patent 10-2022-0037181, Mar. 25, 2022 (pending).
S. Choi, Y. Son, B. Lee, G. Jang, and S. Joo, Development of system stability analysis considering potential distributed resources in future power system, Korea Patent 10-2022-0000483, Jan. 03, 2022 (pending).
H. Woo, S. Park, and S. Choi*, A study on hybrid AC/DC transmission system planning for improving the hosting capacity of offshore windfarms, The Transactions of the Korean Institute of Electrical Engineers, vol. 74, no. 9, pp. 1433-1439, Sep. 2025.
Y. Yoon, S. Jung, Y. son, and S. Choi*, Analysis and modeling of real world inverter-based resources sub-synchronous oscillation cases, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, vol. 39, no. 4, pp. 283-293, Aug. 2025.
J. Yoo and S. Choi*, Development of a distribution system analysis program considering various distributed generations and distributed generation connection codes, The Transactions of the Korean Institute of Electrical Engineers, vol. 72P, no. 3, pp. 223-230, Sep. 2023.
J. Noh and S. Choi*, Protection coordination test in network distribution systems using HILS, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, vol. 37, no. 4, pp. 42-49, Aug. 2023.
S. Choi*, Massive wildfires throughout Korean eastern coast and sub-synchronous oscillation events, KIEE Magazine, vol. 71, no. 6, pp. 10-13, Jun. 2022.
J. Im, Y. Yoon, and S. Choi*, Parameter estimation of transformer frequency response model using machine learning methods, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, vol. 36, no. 2, pp. 8-13, Feb. 2022.
D. Shin and S. Choi*, Economic design of grounding systems through the application of new grounding resistance reduction materials, The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers, Vol. 36, no. 1, pp. 31-35, Jan 2022.
D. Lee, S. Jung, and S. Choi, Performance evaluation of high-speed response control for IBRs against sudden AI data center load fluctuations in a real-time HIL environment, in Proceedings on 2026 Korea Institute of Electrical Engineers (KIEE) Spring Conference for Society A, Seoul, Apr. 2026.
K. Lee, Y. Yoon, and S. Choi, SCR-based operation strategy of under-frequency relays considering high renewable penetration, in Proceedings on 2026 Korea Institute of Electrical Engineers (KIEE) Spring Conference for Society A, Seoul, Apr. 2026.
Y. Yoon, M. Kim, J. Park, and S. Choi, A study of inverter-based reactive power control for voltage regulation in the distribution system, in Proceedings on 2025 Korea Institute of Electrical Engineers (KIEE) Fall Conference for Society A, Jeju, Oct. 2025.
D. Lee, S. Lee, Y. Son, and S. Choi, Solar panel installation site selection through aerial image analysis based on mask R-CNN, in Proceedings on 2025 Korea Institute of Electrical Engineers (KIEE) Fall Conference for Society A, Jeju, Oct. 2025.
Y. Son, H. Woo, and S. Choi, MISOCP-based optimal operation of islanded microgrids for fault response under disaster conditions, in Proceedings on 2025 56th Korea Institute of Electrical Engineers (KIEE) Summer Conference, Busan, Jul. 2025.
S. Jung, Y. Yoon, and S. Choi, Reinforcement learning-based mitigation of sub-synchronous oscillation method validation environment through real-time simulation, in Proceedings on 2025 Korea Institute of Electrical Engineers (KIEE) Spring Conference for Society A, Seoul, Apr. 2025.
Y. Yoon, M. Yoon, and S. Choi, STATCOM control with reinforcement learning for damping power system oscillations, in Proceedings on 2025 Korea Institute of Electrical Engineers (KIEE) Spring Conference for Society A, Seoul, Apr. 2025.
J. Jang, M. Yoon, Y. Yoon, and S. Choi, Analysis and modeling of real world inverter based resources sub-synchronous oscillation cases, in Proceedings on 2024 Korea Institute of Electrical Engineers (KIEE) Fall Conference for Society A, Gyeongju, Oct. 2024.
S. Han and S. Choi, Short-circuit analysis based on interconnection method of photovoltaic systems in an industrial network, in Proceedings on 2024 Korea Institute of Electrical Engineers (KIEE) Fall Conference for Society A, Gyeongju, Oct. 2024.
S. Gham, M. Yoon, J. Lee, J. Kim, D. Lee, and S. Choi, A method of selecting the capacity of the reactive power compensators at the connection point of the offshore wind farm, in Proceedings on 2024 Korea Institute of Electrical Engineers (KIEE) Fall Conference for Society A, Gyeongju, Oct. 2024.
H. Kim, Y. Kim, M. Kang, and S. Choi, A Study on electrolyzer placement evaluation method considering renewable generation scenario, in Proceedings on 2024 55th Korea Institute of Electrical Engineers (KIEE) Summer Conference, Jeju, Jul. 2024.
Y. Son, Y. Yoon, and S. Choi, Maximum hosting capacity estimation in AC/DC hybrid distribution networks, in Proceedings on 2024 55th Korea Institute of Electrical Engineers (KIEE) Summer Conference, Jeju, Jul. 2024.
M. Yoon and S. Choi, Stability analysis for microgrid operation in distribution system with GFM inverter, in Proceedings on 2024 55th Korea Institute of Electrical Engineers (KIEE) Summer Conference, Jeju, Jul. 2024.
H. Woo, S. Kim, J. Kwak, and S. Choi, A framework for the determination of optimal operating point of multi-terminal DC for transfering surplus power in HoNam area, in Proceedings on 2024 55th Korea Institute of Electrical Engineers (KIEE) Summer Conference, Jeju, Jul. 2024.
Y. Yoon, J. Jang, M. Yoon, and S. Choi, Design of the physics-informed reinforcement learning model to mitigate subsynchronous oscillation, in Proceedings on 2024 55th Korea Institute of Electrical Engineers (KIEE) Summer Conference, Jeju, Jul. 2024.
Y. Son, Y. Yoon, J. Jang, and S. Choi, Generating a synthetic SSO signal using GANs, in Proceedings on 2024 Korean Institute of Illuminating and Electrical Installation Engineers (KIIEE) Annual Spring Conference, Pyeongchang, May. 2024.
S. Gham, M. Yoon, J. Lee, J. kim, D. Lee, and S. Choi, Efficient protection designing for low-voltage direct current systems using high-speed fuses, in Proceedings on 2024 Korea Institute of Electrical Engineers (KIEE) Spring Conference for Society A, Yeosu, Apr. 2024.
J. Jang, M. Yoon, and S. Choi, A study on comparing improved oscillation mitigation control performance through mathematical models, in Proceedings on 2024 Korea Institute of Electrical Engineers (KIEE) Spring Conference for Society A, Yeosu, Apr. 2024.