Francisco de Leon ,
PhD, IEEE Fellow

Professor

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Francisco de Leon

After several academic and industry positions in Mexico and Canada, I joined the Department of Electrical and Computer Engineering of Polytechnic University (previously Brooklyn Poly and now the NYU Tandon School of Engineering) as Associate Professor in September 2007. Obtained tenure in 2013 and was promoted to (full) Professor in September 2019. The years in this position have been the most productive and most exciting time of my career. With my many students we have solved a large number of long-standing problems in power engineering, we have invented several new machines, and worked on a large number of projects for the local industry. 

Research Interests: My main research interest has been the modeling of transformers for electromagnetic transients. I have published over fifty journal papers and twenty conference papers on transformer topics. Other research interests include the analysis of power phenomena under non-sinusoidal conditions, the transient and steady state analyses of power systems, the thermal rating of cables and transformers, and the calculation of electromagnetic fields applied to machine design and modeling.

I received the B.Sc. degree and the M.Sc. degree (summa cum laude) in electrical engineering from the National Polytechnic Institute (IPN), Mexico, in 1983 and 1986, respectively. In 1992 I have obtained the Ph.D. degree also in electrical engineering from the University of Toronto, Canada. From 1992 to 1997 I was with the Graduate Division of the School of Electrical and Mechanical Engineering of the IPN, Mexico. From September 1997 to August 1998 I was on a sabbatical leave at McGill University in Montreal, and from September 1998 to April 1999 I was a post-doctoral researcher at the University of Toronto.

From 1999 to 2007 I held several academic positions in Mexico and worked for the Canadian electric industry in the research and development of standard and special motors and transformers. From 2004 to 2007 I was the Director of R&D at CYME International T&D in St. Bruno (Quebec) developing professional grade software for the analysis of power and distribution systems and cable ampacity. I have joined the Department of Electrical and Computer Engineering of Polytechnic University (previously Brooklyn Poly and now the NYU Tandon School of Engineering) as Associate Professor in September 2007. Obtained tenure in 2013 and was promoted to (full) Professor effective September 2019.  

I have over 100 publications including: 111 journal papers, 5 book chapters, 14 discussions in the IEEE Transactions, 53 conference papers, and over 10 patents. My papers have been cited over 1,250 times in journals contained in the Science Citation Index and more than 3,700 times in Google Scholar. I have graduated 24 PhD, 27 MSc students and supervised 16 postdoctoral fellows and 7 visiting PhD students from other universities. I am an Editor of the IEEE Transactions on Power Delivery since 2009, Editor/Coordinator of the IEEE Power Engineering Letters since 2011, and Guest Editor-in-Chief of a Special Section on Advances in Condition Monitoring and Assessment of Power Equipment for the IEEE Transactions on Power Delivery to be published in August 2019. I was elevated to IEEE Fellow in 2015.

My areas of greater interest include the transient and steady-state analyses of power systems, the analysis of power definitions under nonsinusoidal conditions, the dynamic thermal rating of cables and transformers, and the calculation of electromagnetic and thermal fields applied to machine design and modeling.


University of Toronto 1999
Post-doctoral Fellow, Electrical Engineering

McGill University 1998
Post-doctoral Fellow, Electrical Engineering

University of Toronto 1992
Post-doctoral Fellow, Electrical Engineering

University of Toronto 1992
Doctor of Philosophy, Electrical Engineering (Power)

Instituto Politécnico Nacional, Mexico 1986
Master of Science (suma cum laude), Electrical Engineering (Power)

Instituto Politécnico Nacional, Mexico 1983
Bachelor of Science, Electrical Engineering (Machine Design)


111 journal papers (91 IEEE Transactions)
14 refereed discussions (IEEE Transactions)
1,250+ citations (Science Citation Index)
3,700+ citations (Google Scholar)

54 conference papers and other publications
12+ patents

 


(* indicates supervised student, postdoctoral fellow, or visitor)

2019

  1. S. Jazebi*, F. de León, and A. Nelson, “Review of Wildfire Management Techniques—Part I: Causes, Prevention, Detection, Suppression, and Data Analytics”, paper accepted for publication in the IEEE Transactions on Power Delivery.
  2. S. Jazebi*, F. de León, and A. Nelson, “Review of Wildfire Management Techniques—Part II: Urgent Call for Investment in Research and Development of Preventative Solutions”, paper accepted for publication in the IEEE Transactions on Power Delivery.
  3. W. Wang* and F. de León, “Quantitative Evaluation of DER Smart Inverters for the Mitigation of FIDVR”, paper accepted for publication in the IEEE Transactions on Power Delivery.
  4. S. Behzadirafi* and F. de León, “Closed-Form Determination of the Impedance Locus Plot of Fault Current Limiters: Asymmetrical Faults,” paper accepted for publication in the IEEE Transactions on Power Delivery.
  5. Q. Wu*, D. Deswal*, M. Yang*, and F. de León, “Experimental Study of Magnetic Effects of Steel Tanks on Three-Phase Transformer Transients”, paper accepted for publication in the IEEE Transactions on Power Delivery.
  6. M. Yang*, D. Deswal*, and F. de León, “Mitigation of Half-Cycle Saturation of Adjacent Transformers during HVDC Monopolar Operation – Part I: Mitigation Principle and Device Design”, paper accepted for publication in the IEEE Transactions on Power Delivery.
  7. M. Yang*, D. Deswal*, and F. de León, “Mitigation of Half-Cycle Saturation of Adjacent Transformers during HVDC Monopole Operation – Part II: Detecting Zero-Sequence Fault Currents”, paper accepted for publication in the IEEE Transactions on Power Delivery.
  8. D. Deswal* and F. de León, “Generalized Circuit Model for Eddy Current Effects in Multi-Winding Transformers”, IEEE Transactions on Power Delivery, vol. 34, no. 2, March 2019, pp. 638-650 (13 pages!).
  9. Q. Wu*,  T. Hong*, S. Jazebi*, F. de León, “Experimentally Validated Method to Measure the λ-i Characteristics of Asymmetric Three-Phase Transformers”, IEEE Transactions on Magnetics, Vol. 55, No. 4, pp. 8101009, April 2019.

2018

  1. H. Lu*, F. de León, D. Soni*, and W. Wang*, “Two-Zone Geological Soil Moisture Migration Model for Cable Thermal Rating”, IEEE Transactions on Power Delivery, vol. 33, no. 6, December 2018, pp. 3196-3204.
  2. W. Wang*, M. Diaz-Aguiló*, K. B. Mak*, F. de León, D. Czarkowski, and R. E. Uosef*, ”Time Series Power Flow Framework for the Analysis of FIDVR Using Linear Regression”, IEEE Transactions on Power Delivery, vol. 33, no. 6, December 2018, pp. 2946-2955.
  3. S. Behzadirafi* and F. de León, “Closed-Form Determination of the Impedance Locus Plot of Fault Current Limiters: A Rigorous Approach with Graphical Representation,” IEEE Transactions on Power Delivery, vol. 33, no. 6, December 2018, pp. 2710-2717.
  4. A. Sedaghat*, H. Lu*, A. Bokhari*, and F. de León, “Enhanced Thermal Model of Power Cables Installed in Ducts for Ampacity Calculations”, IEEE Transactions on Power Delivery, vol. 33, no. 5, October 2018, pp. 2404-2411.
  5. M. Yang*, R. Kazemi*, S. Jazebi*, D. Deswal*, and F. de León, “Retrofitting the BCTRAN Transformer Model with Non-Linear Magnetizing Branches for the Accurate Study of Low-Frequency Deep Saturating Transients”, IEEE Transactions on Power Delivery, vol. 33, no. 5, October 2018, pp. 2344-2353.
  6. Z. Li*, S. Wang, X. Zheng, F. de León, and T. Hong, “Dynamic Demand Response using Customer Coupons Considering Multiple Load Aggregators to Simultaneously Achieve Efficiency and Fairness”, IEEE Transactions on Smart Grid, vol. 9, no. 4, July 2018, pp. 3112-3121.
  7. T. Hong* and F. de León, “Centralized Unbalanced Dispatch of Smart Distribution dc Microgrid Systems”, IEEE Transactions on Smart Grid, vol. 9, no. 4, July 2018, pp. 2852-2861.
  8. H. Lu*, A. Bokhari*, T. Hong*, and F. de León, “Experimental Evaluation of Available Computational Methods for Eddy Current and Hysteresis Losses for Cables Installed in Steel Pipes”, IEEE Transactions on Power Delivery, vol. 33, no. 4, August 2018, pp. 1777-1786.
  9. W. Wang*, S. Jazebi*, F. de León, and Z. Li*, “Looping Radial Distribution Systems Using Superconducting Fault Current Limiters: Feasibility and Economic Analysis”, IEEE Transactions on Power Systems, vol. 33, no. 3, May 2018, pp. 2486-2495.
  10. T. Hong*, D. Deswal*, and F. de León, “An Online Data-Driven Technique for the Detection of Transformer Winding Deformations”, IEEE Transactions on Power Delivery, vol. 33, no. 2, April 2018, pp. 600-609.
  11. J. Wang*, A. Raza*, T. Hong*, A. Cisco Sullberg*, F. de León, and Q. Huang, “Analysis of Energy Savings of CVR including Refrigeration Loads in Distribution Systems”, IEEE Transactions on Power Delivery, vol. 33, no. 1, February 2018, pp. 158-168.
  12. H. Lu*, A. Borbuev*, S. Jazebi*, T. Hong*, and F. de León, “Smart Load Management of Distribution-Class Toroidal Transformers using a Dynamic Thermal Model”, IET Generation, Transmission & Distribution, vol. 12, no. 1, January 2018, pp. 142-149.

2017

  1. R. Zimmerman, Q. Zhu, F. de León, and Z. Guo, “Conceptual Modeling Framework to Integrate Resilient and Interdependent Infrastructure in Extreme Weather”, ASCE Journal of Infrastructure Systems, vol. 23, no. 4, Dec. 2017, pp. 04017034.
  2. T. Hong* and F. de León, “Controlling Non-Synchronous Microgrids for Load Balancing of Radial Distribution Systems”, IEEE Transactions on Smart Grid, Vol. 8, No. 6, November 2017, pp.2608-2616.
  3. S. Saadat, A. Borbuev, and F. de León, “Thermal Analysis of Power Cables Installed in Solid Bottom Trays using an Equivalent Circuit”, IEEE Transactions on Power Delivery, Vol. 32, No. 4, August 2017, pp. 2130-2139.
  4. Z. Li, S. Jazebi, and F. de León, "Determination of the Optimal Switching Frequency for Distribution System Reconfiguration", IEEE Transactions on Power Delivery, Vol. 32, No. 4, August 2017, pp. 2130-2139.
  5. R. Kazemi, S. Jazebi, D. Deswal, and F. de Leόn, “Estimation of Design Parameters of Single-Phase Distribution Transformers from Terminal Measurements”, IEEE Transactions on Power Delivery, Vol. 32, No. 4, August 2017, pp. 2031-2039.
  6. Q. Wu*, S. Jazebi*, and F. de León, “Parameter Estimation of Three-Phase Transformer Models for Low-Frequency Transient Studies from Terminal Measurements”, IEEE Transactions on Magnetics, Vol. 53, No. 7, pp. 8107108, July 2017.
  7. R. Hardowar, S. Rodriguez, R. E. Uosef, F. de León, and D. Czarkowski, “Prioritizing the Restoration of Network Transformers using Distribution System Loading and Reliability Indices”, IEEE Transactions on Power Delivery, Vol. 32, No. 3, June 2017, pp. 1236-1243.
  8. M. Moghaddami, A. I. Sarwat, and F. de León, “Reduction of Stray Loss in Power Transformers Using Horizontal Magnetic Wall Shunts”, IEEE Transactions on Magnetics, Vol. 53, No. 2, February 2017, p. 8100607.

2016

  1. T. Hong, A. Raza, and F. de León, “Optimal Power Dispatch under Load Uncertainty using a Stochastic Approximation Method”, IEEE Transactions on Power Systems, Vol. 31, No. 6, November 2016, pp. 4495-4503.      
  2. C. Alonso and F. de León, “Experimental Parameter Determination and Laboratory Verification of the Inverse Hysteresis Model for Single-Phase Toroidal Transformers”, IEEE Transactions on Magnetics, Vol. 52, No. 11, November 2016.
  3. Q. Deng, J. Liu, M. Bojarski, D. Czarkowski, F. de León, and E. Asa, “Design of a Wireless Charging System with a Phase-Controlled Inverter for Electric Vehicles under Varying Parameters”, IET Power Electronics, Volume 9, No. 13, October 2016, pp. 2461-2470.
  4. S. Jazebi, S. E. Zirka, M. Lambert, A. Rezaei-Zare, N. Chiesa, Y. Moroz, X. Chen, M. Martinez-Duro, C. M. Arturi, E. P. Dick, A. Narang, R. A. Walling, J. Mahseredjian, J. A. Martinez, and F. de León (Chair of the IEEE Taskforce), “Duality Derived Transformer Models for Low-Frequency Electromagnetic Transients – Part II: Complementary Modeling Guidelines”, IEEE Transactions on Power Delivery, Vol. 31, No. 5, October 2016, pp. 2420-2430.
  5. S. Jazebi, S. E. Zirka, M. Lambert, A. Rezaei-Zare, N. Chiesa, Y. Moroz, X. Chen, M. Martinez-Duro, C. M. Arturi, E. P. Dick, A. Narang, R. A. Walling, J. Mahseredjian, J. A. Martinez, and F. de León (Chair of the IEEE Taskforce), “Duality Derived Transformer Models for Low-Frequency Electromagnetic Transients – Part I: Topological Models”, IEEE Transactions on Power Delivery, Vol. 31, No. 5, October 2016, pp. 2410-2419.
  6. S. Jazebi, R. Doğan, B. Kovan, and F. de León, “Reduction of Inrush Currents in Toroidal Transformers by Sector Winding Design”, IEEE Transactions on Power Electronics, Vol. 31, No. 10, October 2016, pp. 6766-6780.
  7. D. ScianoA. Raza, R. SalcedoM. Diaz-AguiloR. E. UosefD. Czarkowski, and F.  de León, “Evaluation of DC-Links on Dense-Load Urban Distribution Networks, IEEE Transactions on Power Delivery, Vol. 31, No. 3, June 2016, pp. 1317-1326.
  8. R. Salcedo, A. Bokhari, M. Diaz-Aguiló, N. Lin, T. Hong, F. de León, D. Czarkowski, S. Flank, A. McDonnell, and R. E. Uosef, “Benefits of a Non-Synchronous Microgrid on Dense-Load Low-Voltage Secondary Networks”, IEEE Transactions on Power Delivery, Vol. 31, No. 3, June 2016, pp. 1076-1084.
  9. R. Doğan, S. Jazebi, and F. de León, “Investigation of Transformer-Based Solutions for the Reduction of Inrush and Phase-Hop Currents”, IEEE Transactions on Power Electronics, Vol. 31, No. 5, May 2016, pp. 3506-3516.  
  10. A. Bokhari, A. Raza, M. Diaz-Aguiló, F. de León, D. Czarkowski, R. E. Uosef, and D. Wang, “Combined Effect of CVR and DG Penetration in the Voltage Profile of Low Voltage Secondary Distribution Networks”, IEEE Transactions on Power Delivery, Vol. 31, No. 1, February 2016, pp. 286-293.
  11. Q. Deng, J. Liu, D. Czarkowski, M. K. Kazimierczuk, M. Bojarski, H. Zhou, and W. Hu, “Frequency-Dependent Resistance of Litz-Wire Square Solenoid Coils and Quality Factor Optimization for Wireless Power Transfer”, IEEE Transaction on Industrial Electronics, vol. 63, no.5, pp. 2825-2837, May 2016.
  12. M. T Outeiro, G. Buja, and D. Czarkowski, "Resonant Power Converters: an Overview", IEEE Industrial Electronics Magazine, Vol. 10, no. 2, pp. 21-45, June 2016.

2015

  1. T. Hong and F. de León, “Lissajous Curve Methods for the Identification of Nonlinear Circuits: Calculation of a Physical Consistent Reactive Power”, IEEE Transactions on Circuits and Systems I, Vol. 62, No. 12, December 2015, pp. 2874-2885. 
  2. Y.-C. Chu, N. S. Artan, D. Czarkowski, L.-R. Chang-Chien, and J. Chao, “High-efficiency high-current drive power converter IC for wearable medical devices,” IEICE Electronics Express, Dec. 2015, advanced publication.
  3. E. Asa, K. Colak, M. Bojarski, and D. Czarkowski,“Asymmetrical duty-cycle and phase-shift control of a novel multi-port CLL resonant converter,” IEEE J. Emerging Sel. Topics Power Electron., vol.3, no.4, pp.1122-1131, Dec. 2015.
  4. E. Asa, K. Colak, and D. Czarkowski, “Analysis of CLL Resonant Converter with Semi Bridgeless Active Rectifier and Hybrid Control” IEEE Transaction on Industrial Electronics, vol. 62, no. 11, pp. 6877-6886, Nov. 2015.
  5. S. Jazebi, F. de León, and N. Wu, “Enhanced Analytical Method for the Calculation of the Maximum Inrush Currents of Single-Phase Power Transformers”, accepted for publication in the IEEE Transactions on Power Delivery; available in Early Access.
  6. S. Jazebi and F. de León, “Duality-Based Transformer Model Including Eddy Current Effects in the Windings”, accepted for publication in the IEEE Transactions on Power Delivery; available in Early Access.
  7. A. Bokhari, A. Raza, M. Diaz-Aguiló, F. de León, D. Czarkowski, R. E. Uosef, and D. Wang, “Combined Effect of CVR and DG Penetration in the Voltage Profile of Low Voltage Secondary Distribution Networks”, accepted for publication in the IEEE Transactions on Power Delivery; available in Early Access.
  8. R. Hardowar, S. Rodriguez, R. E. Uosef, F. de León, and D. Czarkowski, “Prioritizing the Restoration of Network Transformers using Distribution System Loading and Reliability Indices”, accepted for publication in the IEEE Transactions on Power Delivery; available in Early Access.
  9. M. Diaz-Aguiló and F. de León, “Adaptive Soil Model for Real-Time Thermal Rating of Underground Power Cables”, IET Science, Measurement & Technology, Vol. 9, no. 6, September 2015, pp. 654–660.
  10. M. Diaz-Aguiló and F. de León, “Introducing Mutual Heating Effects in the Ladder-type Soil Model for Dynamic Thermal Rating of Underground Cables”, IEEE Transactions on Power Delivery, Vol. 30, No. 4, August 2015, pp. 1958-1964.
  11. B. Kovan and F. de León, “Mitigation of Geomagnetically Induced Currents by Neutral Switching”, IEEE Transactions on Power Delivery, Vol. 30, No. 4, August 2015, pp. 1999-2006.
  12. F. de León, S. Jazebi, A. Farazmand, D. Deswal, and R. Levi, “Elimination of Residual Flux in Transformers by the Application of an Alternating Polarity DC Voltage Source”, IEEE Transactions on Power Delivery, Vol. 30, No. 4, August 2015, pp. 1727-1734.
  13. I. Baker and F. de León, “An Equivalent Circuit for the Thermal Analysis of Cables in Non-Vented Vertical Risers”, IET Science, Measurement & Technology, Vol. 9, No. 5, pp 606-614, August 2015.
  14. T. Hong and F. de León, “A Reconfigurable Auto-Loop Micro-Grid”, IEEE Transactions on Power Delivery, Vol. 30, No. 3, June 2015, pp. 1644-1645.
  15. S. Jazebi and F. de León, “Experimentally Validated Reversible Multi-Winding Transformer Model for the Accurate Calculation of Low- Frequency Transients”, IEEE Transactions on Power Delivery, Vol. 30, No. 1, February 2015, pp. 193-201.

2014

  1. M. Diaz-Aguiló, S. Jazebi, and F. de León, “Ladder-type Soil Model for Dynamic Thermal Rating Applicable to Real-Time Operation of Underground Power Cables”, accepted for publication in the IEEE Power and Energy Technology Systems Journal.
  2. A. Sedaghat and F. de León, “Thermal Analysis of Power Cables in Free Air: Evaluation and Improvement of the IEC Standard Ampacity Calculations”, IEEE Transactions on Power Delivery, Vol. 29, No. 5, October 2014, pp. 2306-2314.
  3. M. Lambert, M. Martínez-Duró, J. Mahseredjian, F. de León, and F. Sirois, “Transformer Leakage Flux Models for Electromagnetic Transients: Critical Review and Validation of a New Model”, IEEE Transactions on Power Delivery, Vol. 29, No. 5, October 2014, pp.
    2180-2188.
  4. P. Gómez, F. de León, and F. P. Espino-Cortés, Improved Computation of Core Inductance for Fast Transient Analysis of Transformers, IEEE Transactions on Power Delivery, Vol. 29, No. 4, August 2014, pp. 2034-2036.
  5. J. Sandraz, R. Macwan, M. Diaz-Aguiló, J. McClelland, F. de León, D. Czarkowski, and C. Comack, “Energy and Economic Impacts of the Application of CVR in Heavily-Meshed Secondary Distribution Networks”, IEEE Transaction on Power Delivery, Vol. 29, No. 4, August 2014, pp. 1692-1700.
  6. A. Farazmand, F. de León, K. Zhang, and S. Jazebi, “Analysis, Modeling and Simulation of the Phase-Hop Condition in Transformers: The Largest Inrush Currents”, IEEE Transaction on Power Delivery, Vol. 29, No. 4, August 2014, pp. 1918-1926.
  7. S. Purushothaman, F. de León, and M. Terracciano, “Calculation of Cable Thermal Rating Considering Non-Isothermal Earth Surface”, IET Generation, Transmission & Distribution, 2014 Vol. 8, No. 7, pp. 1354-1361.
  8. A. Bokhari, A. Alkan, A. Sharma, R. Dogan, M. Diaz Aguiló, F. de León, D. Czarkowski, Z. Zabar, L. Birenbaum, A. Noel, and R. Uosef, “Experimental Determination of the ZIP Coefficients for Modern Residential, Commercial and Industrial Loads”, IEEE Transactions on Power Delivery, Vol. 29, No. 3, June 2014, pp. 1372-1381.
  9. F. de León, S. Jazebi, and A. Farazmand, “Accurate Measurement of the Air-Core Inductance of Iron-Core Transformers with a Non- Ideal Low-Power Rectifier”, IEEE Transaction on Power Delivery, Vol. 29, No. 1, February 2014, pp. 294-296.
  10. F. de León, S. Purushothaman, and L. Qaseer, “Leakage Inductance Design of Toroidal Transformers by Sector Winding”, IEEE Transactions on Power Electronics, Vol. 29, No. 1, January 2014, pp. 473-480.

2013

  1. F. de León, S. Jazebi, and A. Farazmand, “Accurate Measurement of the Air-Core Inductance of Iron-Core Transformers with a Non-Ideal Low-Power Rectifier”, accepted for publication in the IEEE Transaction on Power Delivery.
  2. R. Salcedo, X. Ran, F. de León, D. Czarkowski, and V. Spitsa, “Long Duration Overvoltages due to Current Backfeeding in Secondary Networks”, accepted for publication in the IEEE Transactions on Power Delivery.
  3. P. Moghe and F. de León, “Parametric Study of Losses in Cross Bonded Cables: Conductors Transposed versus Conductors Non-Transposed”, accepted for publication in the IEEE Transactions on Power Delivery.
  4. M. Diaz Aguiló, J. Sandraz, R. Macwan, F. de León, D. Czarkowski, C. Comack, and D. Wang, “Field Validated Load Model for the Analysis of CVR in Distribution Secondary Networks: Energy Conservation”, accepted in June 2013 for publication in the IEEE Transactions on Power Delivery.
  5. S. Jazebi, F. de León, A. Farazmand, and D. Deswal, “Dual Reversible Transformer Model for the Calculation of Low-Frequency Transients”, accepted for publication in the IEEE Transactions on Power Delivery.
  6. J. Sandraz, F. de León, and J. Cultrera, “Validated Transient Heat Transfer Model of Underground Transformer in Rectangular Vaults”, IEEE Transactions on Power Delivery, Vol. 28, No. 3, July 2013, pp. 1770-1778.
  7. F. de León and S. Purushothaman, “Closed Form Computation of Electromagnetic Fields in Induction Motors”, paper accepted for publication in the International Journal of Power and Energy Systems in March 2013.
  8. S. Jazebi, F. de León, and B. Vahidi, “Duality-Synthesized Circuit for Eddy Current Effects in Transformer Windings”, IEEE Transactions on Power Delivery, Vol. 28, No. 2, April 2013, pp. 1063-1072.
  9. P. Gómez, F. de León, and F. P. Espino-Cortés, “Improvement of a Method to Compute the Inductance Matrix of Multilayer Transformer Windings For Very Fast Transients”, IEEE Transactions on Power Delivery, Vol. 28, No. 2, April 2013, pp. 1245-1246.
  10. F. de León, D. Czarkowski, V. Spitsa, J. A. Martinez, T. Noda, R. Iravani, X. Wang, A. Davoudi, G. W. Chang, A. Mehrizi-Sani, and I. Kocar “Development of Data Translators for Interfacing Power-Flow Programs with EMTP-Type Programs: Challenges and Lessons Learned”,IEEE Transactions on Power Delivery, Vol. 28, No. 2, April 2013, pp. 1192-1201.
  11. S. Jazebi, A. Farazmand, B. Murali, F. de León, “A Comparative Study on pi and T Equivalent Circuits for the Analysis of Transformer Ferroresonance”, IEEE Transactions on Power Delivery, Vol. 28, No. 1, January 2013, pp. 526-528.

2012

  1. P. Chen, R. Salcedo, Q. Zhu, F. de León, D. Czarkowski, Z. P. Jiang, V. Spitsa, Z. Zabar, and R. Uosef, “Analysis of Voltage Profile Problems due to the Penetration of Distributed Generation in Low-Voltage Secondary Distribution Networks”, IEEE Transactions on Power Delivery, Vol. 27, No. 4, October 2012, pp. 2020-2028.
  2. F. de León, A. Farazmand, and P. Joseph, “Comparing the T and pi Equivalent Circuits for the Calculation of Transformer Inrush Currents”, IEEE Transactions on Power Delivery, Vol. 27, No. 4, October 2012, pp. 2390-2398.
  3. L. Yu, S. Purushothaman, P. Joseph, B. Li, T. Grawitz, F. de León, D. Czarkowski, J. Carbonara, D. Sciano, and M. Jolly, “Universal Controller for the Interconnection of Distributed Generators with Utility Lines at Customer Level Voltages”, International Journal of Power and Energy Systems, Vol. 32, No. 3, 2012, pp. 131-138.
  4. L. Qaseer, S. Purushothaman, and F. de León, “Closed Form Analysis of Squirrel Cage Induction Motors with Anisotropic Modeling of Stator and Rotor”, IEEE Transactions on Energy Conversion, Vol. 27, No. 3, pp. 553-560, September 2012.
  5. F. de León, Layth Qaseer, and José Cohen, “AC Power Theory from Poynting Theorem: Identification of the Power Components of Magnetic Saturating and Hysteretic Circuits”, IEEE Transactions on Power Delivery, Vol. 27, No. 3, July 2012, pp. 1548-1556.
  6. M. Terracciano, S. Purushothaman, F. de León, and A. Farahani, “Thermal Analysis of Cables in Unfilled Troughs: Investigation of the IEC Standard and a Methodical Approach for Cable Rating”, IEEE Transactions on Power Delivery, Vol. 27, No. 3, pp. 1423-1431, July 2012.
  7. L. Yu, D. Czarkowski, and F. de León, “Optimal Distributed Control for Voltage Regulation of Distribution Systems with Distributed Generation Resources”, IEEE Transactions on Smart Grid, Vol. 3, No. 2, June 2012, pp. 959-967.
  8. V. Spitsa, X. Ran, R. Salcedo, J. Martinez, R. Uosef, F. de León, D. Czarkowski, and Z. Zabar, “On the Transient Behavior of Large-Scale Distribution Networks during Automatic Feeder Reconfiguration”, IEEE Transactions on Smart Grid, Vol. 3, No. 2, June 2012, pp. 887-896.
  9. S. Purushothaman and F. de León, “Heat Transfer Model for Toroidal Transformers”, Transactions on Power Delivery, Vol. 27, No. 2, April 2012, pp. 813-820.
  10. V. Spitsa, R. Salcedo, X. Ran, J. Martinez, R. Uosef, F. de León, D. Czarkowski, and Z. Zabar, “Three–Phase Time–Domain Simulation of Very Large Distribution Networks”, IEEE Transactions on Power Delivery, Vol. 27, No. 2, April 2012, pp. 677-687.
  11. C. Álvarez-Mariño, F. de León, and X. M. López-Fernández, “Equivalent Circuit for the Leakage Inductance of Multi-Winding Transformers: Unification of Terminal and Duality Models”, IEEE Transactions on Power Delivery, Vol. 27, No. 1, January 2012, pp. 353-361.

2011

  1. I. Hernández, F. de León, and P. Gómez, “Design Formulas for the Leakage Inductance of Toroidal Distribution Transformers”, IEEE Transactions on Power Delivery, Vol. 26, No. 4, October 2011, pp. 2197-2204.
  2. L. Qaseer, F. de León, and S. Purushothaman, “Combined Field and Circuit Theories in Squirrel-Cage Induction Motors based on Micro-T Circuit Model”, Applied Computational Electromagnetics Society - ACES Journal, Vol. 26, No.7, July 2011, pp.551-560.
  3. J. A. Martinez, F. de León, A. Mehrizi-Sani, M.H. Nehrir, C. Wang, and V. Dinavahi, “Tools for Analysis and Design of Distributed Resources. Part II: Tools for Planning, Analysis and Design of Distribution Networks with Distributed Resources”, IEEE Transactions on Power Delivery, Vol. 26, No. 3, July 2011, pp. 1653-1662.
  4. J. A. Martinez-Velasco and F. de León, “Equivalent circuit of a regulating transformer”, Ingeniare. Revista chilena de ingeniería, Vol. 19, No.1, 2011, pp. 93-109.
  5. B. Kovan, F. de León, D. Czarkowski, Z. Zabar, and L. Birenbaum, “Mitigation of Inrush Currents in Network Transformers by Reducing the Residual Flux with an Ultra-Low-Frequency Power Source”, IEEE Transactions on Power Delivery, Vol. 26, No. 3, July 2011, pp. 1563-1570.
  6. P. Gómez and F. de León, “Accurate and Efficient Computation of the Inductance Matrix of Transformer Windings for the Simulation of Very Fast Transients”, IEEE Transactions on Power Delivery, Vol. 26, No. 3, July 2011, pp. 1423-1431.
  7. F. de León, Manuel Márquez-Asensio, and Gabriel Álvarez-Cordero, “Effects of Conductor Counter-Transposition on the Positive Sequence Impedance and Losses of Cross-Bonded Cables”, IEEE Transactions on Power Delivery, Vol. 26, No. 3, July 2011,
    pp. 2060-2063.
  8. P. Gómez, F. de León, and I. Hernández, “Impulse Response Analysis of Toroidal Core Distribution Transformers for Dielectric Design”, IEEE Transactions on Power Delivery, Vol. 26, No. 2, April 2011, pp. 1231-1238.
  9. S. Purushothaman and F. de León, “Eliminating Sub-Synchronous Oscillations with an Induction Machine Damping Unit (IMDU)”, IEEE Transactions on Power Systems, Vol. 26, No. 1, January 2011, pp. 225-232.

2010

  1. I. Hernández, F. de León, J. M. Cañedo, and J. C. Olivares-Galván, “Modelling Transformer Core Joints using Gaussian Models for the Magnetic Flux Density and Permeability”, IET Electric Power Applications, Vol. 4, No. 9, November 2010, pp. 761–771.      
  2. F. de León and J. Cohen, “AC Power Theory from Poynting Theorem: Accurate Identification of Instantaneous Power Components in Nonlinear Switched Circuits”, IEEE Transactions on Power Delivery, Vol. 25, No. 4, October 2010, pp. 2104-2112.
  3. J. C. Olivares-Galván, F. de León, P. S. Georgilakis, and R. Escarela-Pérez, “Selection of Copper versus Aluminum Windings for Distribution Transformers”, IET Electric Power Applications, Vol. 4, No. 6, July 2010, pp. 474–485.
  4. M. Dilek, F. de León, R. Broadwater, and S. Lee, “A Robust Multi-phase Power Flow for General Distribution Networks”, IEEE Transactions on Power Systems, Vol. 25, No. 2, May 2010, pp. 760-768.
  5. J. C. Olivares-Galvan, R. Escarela-Perez, F. de León, E. Campero-Littlewood, and C. Aviles Cruz, “Separation of Core Losses in Distribution Transformers using Experimental Methods”, (IEEE) Canadian Journal of Electrical and Computer Engineering, Vol. 35, No. 1, Winter 2010, pp. 33-39.

2009

  1. J. A. Martinez, F. de León, and V. Dinavahi, “Simulation Tools for Analysis and Design of Distribution Networks with Distributed Energy Resources”, Electrical Power and Utilisation Journal, Vol. XV, No.1, 2009, pp. 33-50.  
  2. F. de León and J. A. Martinez, “Dual Three-Winding Transformer Equivalent Circuit Matching Leakage Measurements”, IEEE Transactions on Power Delivery, Vol. 24, No. 1, January 2009, pp. 160-168.

2008

  1. J. A. Peralta, F. de León, and J. Mahseredjian, “Unbalanced Multiphase Load-Flow Using a Positive-Sequence Load-Flow Program”, IEEE Transactions on Power Systems, Vol. 23, No. 2, May 2008, pp. 469-476.
  2. F. de León and G. Anders, “Effects of Backfilling on Cable Ampacity Analyzed with the Finite Element Method”, IEEE Transactions on Power Delivery, Vol. 23, No. 2, April 2008, pp. 537-543.

Before joining Poly

  1. J. C. Olivares, R. Escarela, S. V. Kulkarni, F. de León, E. Melgoza, and O. Hernández, ”Improved Insert Geometry for Reducing Tank Wall Losses in Pad-Mounted Transformers”, IEEE Transactions on Power Delivery, Vol. 19, No. 3, July 2004, pp. 1120-1126.
  2. J. C. Olivares, R. Escarela-Perez, S. V. Kulkarni, F. de León, M.A. Venegas-Vega, “2D finite-element determination of tank wall losses in pad-mounted transformers”, Electric Power Systems Research, Vol. 71, No. 2, October 2004, pp. 179–185.
  3. F. de León and A. Semlyen, “Iterative Solvers in the Newton Power Flow Problem: Preconditioners, Inexact Solutions, and Partial Jacobian Updates”, IEE Proceedings on Generation, Transmission and Distribution, Volume 149, No. 4, July 2002, pp. 479-484.
  4. A. Semlyen and F. de León, “Quasi-Newton Power Flow Using Partial Jacobian Updates”, IEEE Transactions on Power Systems, Vol. 16, No. 3, August 2001, pp. 332-339.
  5. J. Cohen*, F. de León, and L. M. Hernandez, “Physical Time Domain Representation of Powers in Linear and Nonlinear Electrical Circuits”, IEEE Transactions on Power Delivery, Vol. 14, No. 4, October 1999, pp. 1240-1249.
  6. F. de León and A. Semlyen, "A Simple Representation of Dynamic Hysteresis Losses in Power Transformers", IEEE Transactions on Power Delivery, Vol. 10, No. 1, January 1995, pp. 315-321.
  7. A. Semlyen and F. de León, "Eddy Current Add-On for the Frequency Dependent Representation of Winding Losses in Transformer Models used in Computing Electromagnetic Transients," IEE Proceedings on Generation, Transmission and Distribution, Volume 141, No. 3, May 1994, pp. 209-214.
  8. F. de León and A. Semlyen, "Detailed Modeling of Eddy Current Effects for Transformer Transients," IEEE Transactions on Power Delivery, Vol. 9, No. 2, April 1994, pp. 1143-1150.
  9. F. de León and A. Semlyen, "Complete Transformer Model for Electromagnetic Transients," IEEE Transactions on Power Delivery, Vol. 9, No. 1, January 1994, pp. 231-239.
  10. A. Semlyen and F. de León, "Computation of Electro-Magnetic Transients Using Dual or Multiple Time Steps", IEEE Transactions on Power Systems, Vol. 8, No. 3, August 1993, pp. 1274-1281.
  11. F. de León and A. Semlyen, "Time Domain Modeling of Eddy Current Effects for Transformer Transients", IEEE Transactions on Power Delivery, Vol. 8, No. 1, January 1993, pp. 271-280.
  12. F. de León and A. Semlyen, "Reduced Order Model for Transformer Transients", IEEE Transactions on Power Delivery, Vol. 7, No. 1, January 1992, pp. 361-369.
  13. F. de León and A. Semlyen, "Efficient Calculation of Elementary Parameters of Transformers", IEEE Transactions on Power Delivery, Vol. 7, No. 1, January 1992, pp. 376-383.

 

  1. T. Hong*, F. de León, Q. Zhu, “Optimal Dispatch of Electric Transmission Systems Considering Interdependencies with Natural Gas Systems” in Game Theory for Security Risk Management: From Theory to Practice, Springer, ISBN 978-3-319-75267-9, June 2018.
  2. F. de León, T. Hong*, and A. Raza*, Section 17 “Power System Analysis”, Standard Handbook for Electrical Engineers, Mc-Graw-Hill, pp. 1053-1096, 2018.
  3. F. de León, M. Diaz-Aguiló*, and A. Raza*, Chapter 35 “Conservation Voltage Reduction” (SGD057), Smart Grid Handbook, John Wiley & Sons, Ltd., pp. 661-684, 2016.
  4. F. de León, R. Salcedo*, X. Ran*, and J. A. Martinez-Velasco, Chapter 12, “Time-Domain Analysis of the Smart Grid Technologies: Possibilities and Challenges” in Transient Analysis of Power Systems. Solution Techniques, Tools and Applications, John Wiley & Sons, pp. 481-546, 2015.
  5. F. de León, P. Gómez*, J. A. Martinez-Velasco, and M. Rioual, Chapter 4, “Transformers” in Power System Transients: Parameter Determination, CRC Press, Boca Raton FL, 2009, pp. 177-250

Current Ph.D. Students

  1. Akim Borbuev
  2. John Michael Colef 
  3. Roujia Liu
  4. Ali Iravani
  5. David Giglio

Graduated Ph.D. Students

  1. Digvijay Deswal (May 2019)
  2. Qiong Wu (May 2019)
  3. Wenbo Wang (May 2019)
  4. Haowei Lu  (Dec 2018)
  5. Tianqi Hong (Dec 2016)
  6. Reza Kazemi (Dec 2016)
  7. Ashhar Raza (Dec 2016)
  8. Baris Kovan (April 2016)
  9. Shahriar Saadat (Sep 2015)
  10. Rasim Dogan (Aug 2015) 
  11. Jingduo Huang (Dec 2014)
  12. Abdullah Bokhari (May 2014)
  13. Xuanchang Ran (May 2014)
  14. Imad Baker (May 2014)
  15. Julien Sandraz (May 2014)
  16. Reynaldo Salcedo (April 2014)
  17. Roupchan Hardowar (April 2014)
  18. Ali Sedaghat (April 2014)
  19. Saeed Jazebi (Oct 2013) Honorable mention in the 2013/2014 Alexander Hessel contest 
  20. Ashkan Farazmand (May 2013) 
  21. Deepak Maragal (May 2013)
  22. Sujit Purushothaman (December 2011) Winner of the 2011/2012 Alexander Hessel Award
  23. Resk Uosef (January 2011)
  24. Jose Cohen (April 1999)

Master Students Graduated with Thesis

  1. Arun Agoram Chandrasekar (May 2018)
  2. Jaimin Jha (May 2017)
  3. Carlos Alonso (April 2016)
  4. Akim Borbuev (May 2015)
  5. David Giglio (May 2015)
  6. Vasanth Bharadwaja Kolluri (May 2014)
  7. Leonid Lyakhovich  (August 2013)
  8. Githanjali Venkataramani (May 2012)
  9. Matthew Terracciano (May 2012)
  10. Aditya Sharma (Sep 2012)
  11. Ashish Sharma (May 2012)
  12. Richard Macwan (May 2012)
  13. Rasim Dogan (May 2012)
  14. Don Burkart (Nov 2012)
  15. Noel Augustine (Dec 2011)
  16. Julien Sandraz (Dec 2011)
  17. Reynaldo Salcedo (Dec 2011) Winner of the 2011/2012 Theodor Tamir Award  
  18. Ali Alkan (October 2011
  19. Pranoti Kadam (Jan 2011) Winner of the 2010/2011 Theodor Tamir Award  
  20. Ólöf Helgadóttir (May 2008)
  21. Aung Phyo Thant (May 2008) 

Post-doctoral fellows

  1. Prof. Layth Qaseer (2016-)
  2. Dr. Ming Yang (2017-2019)
  3. Dr. Shayan Behzadi Rafi (2017-2018)
  4. Dr. Li Xianqiang (2017-2018)
  5. Dr. Baris Kovan (2016-2017)
  6. Dr. Michael Omidiora (2015-2016)
  7. Dr. Haina Rong (2015-2016)
  8. Dr. Ali Sedaghat (2014-2015)
  9. Dr. Saeed Jazebi (2014-2016)
  10. Dr. Marc Diaz-Aguiló (2011-2015)
  11. Dr. Ashkan Farazmand  (2013)
  12. Dr. Sujit Purushothaman  (2012)
  13. Prof. Layth Qaseer  (2010-2011)
  14. Dr. Vitaly Spitsa (2010-2011)
  15. Dr. Pablo Gomez (2008-2010)

Visiting scholars

  1. Jun Wang (2015-2016)
  2. Zhechao Li (2015-2016)
  3. Nicola Raimondo (2013)
  4. Casimiro Álvarez-Mariño (2010)
  5. Iván Hernández (2009-2010)

Current Projects, Research Labs, and Groups