Hyunji Lee (이현지) – M.S.

Hyunji Lee received the B.S. and M.S. degrees in electrical engineering from the Ulsan National Institute of Science and Technology, Ulsan, South Korea, in 2015 and 2017, respectively. She is working as an Assistant Engineer with Fine Inc., Seoul, South Korea. Her research interests include design and analysis of differential power processing systems for photovoltaic applications.

ORCID: 0000-0002-0265-1902

Papers:

Tae Won Kim, Tae Joon Park, Katherine A. Kim, and Hyunji Lee. “Apparatus for control photovoltaic power generation (태양광 발전 제어 장치),” Korea Patent 10-2019-0078018 , July 4, 2019.

Hoejeong Jeong, Hyunji Lee, Yu-Chen Liu and Katherine A. Kim, “Review of Differential Power Processing Converter Techniques for Photovoltaic Applications,” IEEE Transactions on Energy Conversion, vol. 34, no. 1, pp. 351-360, Mar. 2019.

Hyunji Lee and Katherine A. Kim, “Design Considerations for Parallel Differential Power Processing Converters in a Photovoltaic-Powered Wearable Application,” Energies, vol. 11, no. 12, pp. 1-17, Nov. 2018, art. no. 3329.

Young-Tae Jeon, Hyunji Lee, Katherine A. Kim, and Joung-Hu Park, “Least Power Point Tracking Method for Photovoltaic Differential Power Processing Systems,” IEEE Trans. Power Electron., vol. 32, no. 3, pp. 1941-1951, Mar. 2017.

Hyunji Lee and Katherine A. Kim, “Differential Power Processing Converter Design for Photovoltaic Wearable Applications,” in Proc. Int. Power Electronics and Motion Control Conf., May 2016, pp. 463-468.

Hyunji Lee and Katherine A. Kim, “Comparison of Photovoltaic Converter Configurations for Wearable Applications,” in Proc. IEEE Workshop on Control and Modeling for Power Electron., July 2015, pp. 1-6.

IEEE IAS 2014 Annual Meeting Attendance

Prof. Katherine A. Kim attended the IEEE Industrial Applications Society Annual Meeting on October 5-9, 2014 in Vancouver, Canada.

At the meeting she:

  1. Gave an update on the Student/Young Professional activities as the Student Membership Chair of the IEEE Power Electronics Society
  2. Presented a poster entitled “Hot Spot Prevention Methods for Photovoltaic Systems”
  3. Chaired the “Student Technical Session”

Fall 2014 Update

Katherine A. Kim (김예린) has officially started as an Assistant Professor in the School of Electrical and Computer Engineering at Ulsan National Institute of Science and Technology (UNIST). In Fall 2014, she will be starting up her research lab and teaching the following courses:

EE313: Introduction to Control [자동제어공학개론]
Level: Undergraduate 3rd-year course
Description: This course introduces fundamentals of linear systems control: mathematical modeling, analysis, and design of systems, transfer function, root locus, bode diagram, Nyquist method, and state space method.

ECE637: Special Topics: Power Systems [전자회로설계및응용특수토픽III]
Level: Masters Course
Description: This special topic course on Power Systems is a graduate level course where you will learn the basics of the electric power grid and the challenges of moving towards a more intelligent grid.

IEEE Conference: APEC 2014

Sairaj V. Dhople, Katherine A. Kim and Alejandro D. Domínguez-García, “Time-optimal control in dc-dc converters: A maximum principle perspective,” IEEE Applied Power Electronics Conference and Exposition, Fort Worth, TX, 2014, pp. 2804-2808. (IEEE Xplore Link)

IEEE Conference: PECI 2014

Katherine A. Kim, Nathan Dostart, Julia Huynh and Philip T. Krein, “Low-cost solar simulator design for multi-junction solar cells in space applications,” Power and Energy Conference at Illinois, Champaign, IL, 2014, pp. 1-6. (IEEE Xplore Link)

Dynamic Photovoltaic Modeling Tools

These are resources for the article “A Dynamic Photovoltaic Model Incorporating Capacitive and Reverse-Bias Characteristics” by Katherine A. Kim, Chenyang Xu, Lei Jin, and Philip T. Krein published in IEEE Journal of Photovoltaics.

Experimental Testing

Equipment Used

Keithley 2429 SourceMeter
Agilent 33250A Function Generator
Tektronix MSO4034 Oscilloscope
Computer with Python and GPIB communication

Testing Files

This .zip file contains:
Test 1: I-V Curve
Test1_IV_sweep.py
Test1_IVdatProcess.m
Test 2: Frequency Sweep
Test2_freq_sweep.py
Test2_CSVProcess.m
Test 3: AC Voltage Sweep
Test3_AC_V_sweep.py
Test3_CSV_IVdat_Process.m
Model Parameter Determination
PV_dyn_model_param_extract.m

Dynamic Photovoltaic (PV) Modelin Matlab Simulink

This .zip file contains (Matlab Simulink Version is from 2013):
Poly-Crystalline PV Cell: simulink_PV_dyn_model_poly.mdl
Mono-Crystalline PV Cell: simulink_PV_dyn_model_mono.mdl

Citation Information

If you use the above PV testing or simulation tools or utilize knowledge from the article, please cite our work!

Citation (IEEE format):
Katherine A. Kim, Chenyang Xu, Lei Jin, and Philip T. Krein, A Dynamic Photovoltaic Model Incorporating Capacitive and Reverse-Bias Characteristics, IEEE Journal of Photovoltaics, vol. 3, no. 4. pp. 1334-1341, Oct. 2013.

IEEE Conference: ECCE 2013

Katherine A. Kim and Philip T. Krein, “Hot spotting and second breakdown effects on reverse I-V characteristics for mono-crystalline Si Photovoltaics,” IEEE Energy Conversion Congress and Exposition, Denver, CO, 2013, pp. 1007-1014. (IEEE Xplore Link)

IEEE Conference: COMPEL 2013

Katherine A. Kim and P. T. Krein, “Photovoltaic hot spot analysis for cells with various reverse-bias characteristics through electrical and thermal simulation,” IEEE Workshop on Control and Modeling for Power Electronics, Salt Lake City, UT, 2013, pp. 1-8. (IEEE Xplore Link)

IEEE Conference: APEC 2013

Katherine A. Kim, Philip T. Krein,  Gab-Su Seo and Bo-Hyung Cho, “Photovoltaic AC parameter characterization for dynamic partial shading and hot spot detection,” IEEE Applied Power Electronics Conference and Exposition, Long Beach, CA, 2013, pp. 109-115. (IEEE Xplore Link)

IEEE Conference: PECI 2013

Shibin Qin, Katherine A. Kim, and Robert C. N. Pilawa-Podgurski, “Laboratory emulation of a photovoltaic module for controllable insolation and realistic dynamic performance,” IEEE Power and Energy Conference at Illinois, Champaign, IL, 2013, pp. 23-29. (IEEE Xplore Link)

IEEE Conference: COMPEL 2012

Katherine A. Kim, Pradeep S. Shenoy and Philip T. Krein, “Photovoltaic differential power converter trade-offs as a consequence of panel variation,” IEEE Workshop on Control and Modeling for Power Electronics, Kyoto, 2012, pp. 1-7. (IEEE Xplore Link)

IEEE Conference: COMPEL 2012

Pradeep S. Shenoy, Katherine A. Kim, and Philip T. Krein, “Comparative analysis of differential power conversion architectures and controls for solar photovoltaics,” IEEE Workshop on Control and Modeling for Power Electronics, Kyoto, 2012, pp. 1-7. (IEEE Xplore Link)

IEEE Conference: PVSC 2012

Pradeep S. Shenoy, Katherine A. Kim, Philip T. Krein, and Patrick L. Chapman, “Differential power processing for efficiency and performance leaps in utility-scale photovoltaics,” IEEE Photovoltaic Specialists Conference, Austin, TX, 2012, pp. 1357-1361. (IEEE Xplore Link)

IEEE Conference: PECI 2012

Katherine A. Kim, Sutchaya Lertburapa, Chenyang Xu, and Philip T. Krein, “Efficiency and cost trade-offs for designing module integrated converter photovoltaic systems,” IEEE Power and Energy Conference at Illinois, Champaign, IL, 2012, pp. 1-7. (IEEE Xplore Link)

IEEE Conference: APEC 2012

Katherine A. Kim, Ran M. Li, and Philip T. Krein, “Voltage-offset resistive control for DC-DC converters in photovoltaic applications,” IEEE Applied Power Electronics Conference and Exposition, Orlando, FL, 2012, pp. 2045-2052. (IEEE Xplore Link)

IEEE Conference: ICPE 2011-ECCE Asia

Katherine A. Kim, Philip T. Krein, Jay J. Lee, Hyunsu Bae, and Bo-Hyung Cho, “Irradiance and temperature transient sensitivity analysis for photovoltaic control,” International Conference on Power Electronics – ECCE Asia, Jeju, 2011, pp. 393-400. (IEEE Xplore Link)

IEEE Conference: APEC 2011

Ali M. Bazzi, Katherine A. Kim, Brian B. Johnson, Philip T. Krein, and Alejandro Domínguez-García, “Fault impacts on solar power unit reliability,” IEEE Applied Power Electronics Conference and Exposition, Fort Worth, TX, 2011, pp. 1223-1231. (IEEE Xplore Link)