Publications

Referred Journal Publications

[J50]    M. Tarulli, S.C. Huerta, A. Prodic, M.R. Popovic, P.W. Lehn, “Merged flyback-SC-based output stage for versatile portable transcutaneous electrical stimulators,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 4, no. 1, 2016, pp. 318-331.

[J49]    K. Filsoof, P.W. Lehn, “A bi-directional multi-input multi-output modular multilevel dc-dc converter and its control design,” IEEE Trans. on Power Electronics, vol. 31, no. 4, 2016, pp. 2767-2779.

[J48]    G.J.Kish, R. Shi, P.W. Lehn, “The delta-configured modular multi-level converter,” IEEE Trans. on Power Delivery, vol. 31, no. 3, 2016, pp. 1060-1067.

[J47]    M. Ranjram, P.W. Lehn, “A multi-port power flow controller for DC transmission grids,” IEEE Trans. on Power Delivery, vol. 31, no. 1, 2016, pp. 389-396.

[J46]    X. Zong, P.A. Gray, P.W. Lehn, “New metric recommended for IEEE Standard 1547 to limit harmonics injected into distorted grids,” IEEE Trans. on Power Delivery, vol. 31, no. 3, 2016, pp. 963-972.

[J45]    G.J. Kish, P.W. Lehn, “Modelling techniques for dynamic and steady-state analysis of modular multi-level dc/dc converters,” IEEE Trans. on Power Delivery, vol. 31, no. 6, 2016, pp. 2502-2510.

[J44]    T. Soong, P.W. Lehn, “Assessment of fault tolerance in modular multilevel converters with integrated energy storage,” IEEE Trans. on Power Electronics, vol. 31, no. 6, 2016, pp. 4085-4095.

[J43]    F. Yahyaei, P.W. Lehn, “Using frequency coupling matrix techniques for the analysis of harmonic interactions,” IEEE Trans. on Power Delivery, vol. 31, no. 1, 2016, pp. 112-121.

[J42]    K. Filsoof, P.W. Lehn, “A bidirectional modular multi-level dc/dc converter of triangular structure”, IEEE Trans. on Power Electronics, vol.30, no.1, pp.54,64, Jan. 2015.

[J41]    G. Kish, M. Ranjram, P.W. Lehn, “A modular multi-level dc/dc converter with fault blocking capability for HVDC interconnects”,  IEEE Trans. on Power Electronics, vol.30, no.1, pp.148,162, Jan. 2015.

[J40]    F. Yahyaei, P.W. Lehn, “On dynamic evaluation of harmonics using generalized averaging techniques,” IEEE Trans. on Power Systems, vol. 30, no. 5, 2015, pp. 2216-2224.

[J39]    T. Soong,  P.W. Lehn, “Internal Power Flow of a Modular Multilevel Converter With Distributed Energy Resources”, Emerging and Selected Topics in Power Electronics, IEEE Journal of , vol.2, no.4, pp.1127,1138, Dec. 2014.

[J38]    T. Soong,  P.W. Lehn, “Evaluation of Emerging Modular Multilevel Converters for BESS Applications”, Power Delivery, IEEE Transactions on , vol.29, no.5, pp.2086,2094, Oct. 2014

[J37]    K. Filsoof, A.A. Hagar, P.W. Lehn, “A transformerless modular step-up dc-dc converter for high power applications”, Power Electronics, IET , vol.7, no.8, pp.2190,2199, August 2014

[J36]    E. Veilleux, P.W. Lehn, “Interconnection of direct-drive wind turbines using a series connected dc grid”, IEEE Trans. on Sustainable Energy, vol. 5, no. 1, 2014, pp. 139-147.

[J35]    A.A. Hagar, P.W. Lehn, “Comparative evaluation of a new family of transformerless modular dc/dc converters for high power applications”, IEEE Trans. on Power Delivery, vol. 29, no. 1, 2014, pp. 444-452.

[J34]    E. Veilleux, B.-T. Ooi, P.W. Lehn, “Marx dc/dc converter for high power applications”, IET Power Electronics, vol. 6, no. 9, 2013, pp. 1733-1741.

[J33]    B.G. Rawn, P.W. Lehn, M. Maggiore, “Disturbance margin for quantifying limits on power smoothing by wind turbines”, IEEE Tran. on Control Systems, vol. 21, no. 5, 2013, pp. 1795-1807.

[J32]    G. J. Kish, J.J. Lee, P.W. Lehn, “Modelling and control of photovoltaic panels utilization the incremental conductance method for maximum power point tracking”, IET Renewable Power Generation, vol. 6, no. 4, 2012, pp. 259-266.

[J31]    K.L. Lian, P.W. Lehn, “Steady state simulation methods of closed loop power converter systems – a systematic solution procedure”, IEEE Trans. On Circuits and Systems: I, vol. 59, no. 6, 2012, pp. 1299-1311.

[J30]    B. Rawn, M. Maggiore, P.W. Lehn, “Invariance kernels of single-input planar nonlinear systems”, SIAM Journal on Control Optimization, vol. 50, no. 2, 2012, pp. 1012-1037.

[J29] J.G. Hwang, P.W. Lehn, M. Winkelnkemper, “A Generalized class of stationary frame current controllers for grid connected AC-DC converters”, IEEE Trans. on Power Delivery, Oct. 2010, pp. 2742-2751.

[J28] J.G. Hwang, P.W. Lehn, “A single-input space vector for control of ac-dc converters under generalized unbalanced operating conditions”, IEEE Trans. on Power Electronics, Aug. 2010, pp. 2068-2081.

[J27] K.L. Lian, B.K. Perkins, P.W. Lehn, “Harmonic analysis of a three-phase diode bridge rectifier based on sampled-data model”, IEEE Trans. on Power Delivery, vol. 23, no. 2, April 2008, pp. 1088-1096.

[J26] C.K. Sao, P.W. Lehn, “Control and Power Management of Converter Fed Microgrids”, IEEE Trans. on Power Systems, vol. 23, no. 3, Aug. 2008, pp. 1088-1098

[J25] P.W. Lehn, K.L. Lian, “Frequency coupling matrix of a voltage source converter derived from piecewise linear differential equations”, IEEE Trans. On Power Delivery, vol. 22, no. 3, July 2007, pp. 1603-1612.

[J24] Testa, A.; Akram, M. F.; Burch, R.; Carpinelli, G.; Chang, G.; Dinavahi, V.; Hatziadoniu, C.; Grady, W. M.; Gunther, E.; Halpin, M.; Lehn, P.; Liu, Y.; Langella, R.; Lowenstein, M.; Medina, A.; Ortmeyer, T.; Ranade, S.; Ribeiro, P.; Watson, N.; Wikston, J.; Xu, W., “Interharmonics: Theory and Modeling”, IEEE Trans. On Power Delivery, vol. 22, no. 4, Oct. 2007, pp. 2335-2348.

[J23] B.G. Rawn, P.W. Lehn, M. Maggiore, “Control methodology to mitigate the grid impact of wind turbines”, IEEE Trans. on Energy Conversion, vol. 22, no. 2, June 2007, pp. 413-438.

[J22] F. Katiraei, M.R. Iravani, P.W. Lehn, “Small signal dynamic model of a micro-grid including conventional and electronically interfaced distributed resources”, IET Generation, Transmission & Distribution, vol. 1, no. 3, May 2007, pp. 369-378.

[J21] K.L. Lian, P.W. Lehn, “Steady-state solution of a voltage source converter with full closed-loop control”, IEEE Trans. on Power Delivery, vol. 21, no. 4, Oct. 2006, pp. 2071-2081.

[J20] D. Dolan, P.W. Lehn, “Simulation model of wind turbine 3p torque oscillations due to wind shear and tower shadow“, IEEE Trans. on Energy Conversion, vol. 21, no. 3, Sept. 2006, pp. 717-724.

[J19] E. Wu, P.W. Lehn, “Digital current control of a voltage source converter with active damping of LCL resonance“, IEEE Trans. on Power Electronics, vol. 21, no. 5, Sept. 2006, pp. 1364-1373.

[J18] A. Pradhan, P.W. Lehn, “Frequency domain analysis of the static synchronous series compensator“, IEEE Trans. on Power Delivery, vol. 21, no. 1, Jan. 2006, pp. 440-449.

[J17]  C.K. Sao, P.W. Lehn, “Autonomous Load Sharing of Voltage Source Converters“, IEEE Transactions on Power Delivery, vol. 20, no. 2, April 2005, pp. 1009-1016.

[J16] R. K.-L. Lian, P.W. Lehn, “Real Time Simulation of Voltage Source Converters based on Time Average Method“, IEEE Transactions on Power Systems, vol. 20, no. 1, Feb 2005, pp. 110-118.

[J15] F. Katiraei, M.R. Iravani, P.W. Lehn, “Micro-grid autonomous operation during and subsequent to islanding process“, IEEE Transactions on Power Delivery, vol. 20, no. 1, Jan. 2005, pp. 248-257.

[J14]  E. Lavers, P.W. Lehn, et. al. “A benchmark system for digital time domain simulation of an active power filter“, IEEE Transactions on Power Delivery, vol. 20, no. 1, Jan. 2005, pp. 234-241.

[J13] P.W. Lehn, “Direct harmonic analysis of the voltage source converter”, IEEE Transactions on Power Delivery, vol. 18, no. 3, July 2003, pp. 1034-1042

[J12]  J. Mossoba, P.W. Lehn, “A controller architecture for high bandwidth active power filters“, IEEE Transactions on Power Electronics, vol. 18, no. 1, Jan. 2003, pp. 317-325.

[J11] J.Z. Bebic, P.W. Lehn, M.R. Iravani, “P-delta characteristics for the unified power flow controller-analysis inclusive of equipment ratings and line limits“,  IEEE Transactions on Power Delivery, vol. 18, no. 3, July 2003, pp. 1066-1072.

[J10]  C.K. Sao, P.W. Lehn, M.R. Iravani, J.A. Martinez, “A benchmark system for digital time-domain simulation of a pulse-width-modulated D-STATCOM“, IEEE Transactions on Power Delivery, vol. 17, no. 4, Oct. 2002, pp. 1113-1120.

[J9]  D.A.N. Jacobson, P.W. Lehn, R.W. Menzies, “Stability domain calculations of period-1 ferroresonance in a nonlinear resonant circuit“, IEEE Transactions on Power Delivery, vol. 17, no. 3, July 2002, pp. 865-871.

[J8]  D. Shen, P.W. Lehn, “Fixed-frequency space-vector-modulation control for three-phase four-leg active power filters“, IEE Proceedings-Electric Power Applications, vol. 149, no. 4, July 2002, pp. 268-274.

[J7]  P.W. Lehn, “Exact Modelling of the Voltage Source Converter“, IEEE Transactions on Power Delivery, vol. 17, no. 1, Jan. 2002, pp. 217-222.

[J6]  D. Shen, P.W. Lehn, “Modelling, Analysis and Control of a Current Source Inverter Based STATCOM“, IEEE Transactions on Power Delivery, vol. 17, no. 1, Jan. 2002, pp. 248-253.

[J5]  H. Mokhtari, M.R. Iravani, S.B. Dewan, P.W. Lehn, J.A. Martinez, “Benchmark Systems for Digital Computer Simulation of a Static Transfer Switch”, IEEE Transactions on Power Delivery, vol. 16, no. 4, Oct. 2001, pp. 724-731.

[J4]  P.W. Lehn, M.R. Iravani, “Discrete Time Modelling and Control of the Voltage Source Converter for Improved Disturbance Rejection”, IEEE Trans. on Power Electronics, Vol. 14, no. 6, Nov. 1999, pp.1028-1036.

[J3]  A. Sonnenmoser, P.W. Lehn, “Line Current Balancing with a Unified Power Flow Controller”, IEEE Trans. on Power Delivery, vol. 14, no. 3, July 1999, pp. 1151-1157.

[J2]  P.W. Lehn, M.R. Iravani, “Experimental Evaluation of STATCOM Closed Loop Dynamics”, IEEE Trans. on Power Delivery, vol. 13, no. 4, Oct. 1998, pp. 1378-1384.

[J1]  P. Lehn, J. Rittiger, B. Kulicke, “Comparison of the ATP Version of the EMTP and the NETOMAC Program for Simulation of HVDC Systems”, IEEE Trans. on Power Delivery, Oct. 1995, pp. 2048-2053.

 Conference Publications

[C56]   R. Shi, P.W. Lehn, “Modified dual inverter drive enabling on-board fast charging of electric vehicles,” Conference of the IEEE Industrial Electronics Society (IECON), 2016, pp. 4435-4440.

[C55]   S. Rivera, M. Ranjram, P.W. Lehn, “A high-efficiency, multi-port dc-dc converter for photovoltaic energy conversion systems,” Conference of the IEEE Industrial Electronics Society (IECON), 2016, pp. 6722-6727.

[C54]   M. Ranjram, P.W. Lehn, “A three-port power flow controller for HVDC grids,” International Power Electronics Conference (IPEC), 2015, pp. 1815-1822.

[C53]   L.E. Zubieta, P.W. Lehn, “A high efficiency unidirectional dc/dc converter for integrating distributed resources into DC microgrids,” IEEE International Conference on DC Microgrids, 2015, pp. 280-284.

[C52]   Y. Han, M. Ranjram, P.W. Lehn, “A bi-directional multi-port dc-dc converter with reduced filter requirements,” IEEE Workshop on Control and Modeling of Power Electronics (COMPEL), 2015, 6 pages.

[C51]   G.J. Kish, C. Holmes, P.W. Lehn, “Dynamic modeling of modular multilevel dc/dc converters for HVDC systems,” IEEE Workshop on Control and Modeling of Power Electronics (COMPEL), 2014, 7 pages.

[C50]   G.J. Kish, P.W. Lehn, “A comparison of modular multilevel energy conversion processes: dc/ac versus dc/dc,” International Power Electronics Conference (IPEC), 2014, pp. 951-958.

[C49]   F. Yahyaei, P.W. Lehn, P.A. Gray, “Identification of relative component participation in harmonic measurements,” IEEE International Conference on Harmonics and Quality of Power (ICHQP), 2014, pp. 132-136.

[C48]    M. Ranjram, G. Simeonov,  P.W. Lehn, “A High Step-Up Transformerless DC/DC Converter with Flat Efficiency”, in Proc. IECON, Oct. 2014

[C47]    F. Yahyaie, P. Gray,  P.W. Lehn, “Application of Experimentally Measured Frequency Coupling Matrices for Improved Harmonic Estimation”, in Proc. 9th Annual CIGRÉ Canada Conference, Sep. 2014

[C46]  P.A. Gray, G.J. Kish, P.W. Lehn, “Harmonic Analysis Software Tool for Steady-State Analysis of Distorted Grids with Multiple Distributed Generators”, in Proc. 9th Annual CIGRÉ Canada Conference, Sep. 2014, pp. 1-8.

[C45]    T. Soong,  P.W. Lehn, “Control of energy storage enabled modular multilevel converters with reduced storage requirements”, Control and Modeling for Power Electronics (COMPEL), 2014 IEEE 15th Workshop on , vol., no., pp.1,7, 22-25 June 2014

[C44]  G.J. Kish, C. Holmes, P.W. Lehn, “Dynamic modeling of modular multilevel DC/DC converters for HVDC systems”, Control and Modeling for Power Electronics (COMPEL), 2014 IEEE 15th Workshop on , vol., no., pp.1,7, 22-25 June 2014.

[C43]  G.J. Kish, P.W. Lehn, “A comparison of modular multilevel energy conversion processes: DC/AC versus DC/DC”, Power Electronics Conference (IPEC-Hiroshima 2014 – ECCE-ASIA), 2014 International, vol., no., pp.951,958, 18-21 May 2014.

[C42]  G.J. Kish, P.W. Lehn, “A modular bidirectional dc power flow controller with fault blocking capability for dc networks”, IEEE COMPEL 2013.

[C41]  K. Filsoof, P.W. Lehn, “Design and control of a bidirectional triangular modular multi-level dc/dc converter”, IEEE COMPEL 2013.

[C40]  T. Soong, P.W. Lehn, “A transformerless high boost dc/dc converter for use in medium / high voltage applications”, IEEE IECON 2012, pp. 174-179.

[C39]  X. Zong, P.W. Lehn, “Reactive power control of single phase grid tied voltage sourced inverters for residential PV applications”, IEEE IECON 2012, pp. 696-701.

[C38]  G. Kish, P.W. Lehn, “Microgrid design considerations for next generation grid codes”, Power and Energy Society General Meeting, 2012 IEEE , vol., no., pp.1,8, 22-26 July 2012 doi: 10.1109/PESGM.2012.6343938.

[C37]  G. Kish, P.W. Lehn, “Harmonic assessment of a multi-megawatt wind farm incorporating a robust and computationally efficient metric to quantify harmonic bursts”, Harmonics and Quality of Power (ICHQP), 2012 IEEE 15th International Conference on , vol., no., pp.546,551, 17-20 June 2012.

[C36]  S. C. Huerta, M. Tarulli, A. Prodic, M. Popovic, P.W. Lehn, “A universal functional electrical stimulator based on merged flyback-SC circuit”,  IEEE PEMC/ IEEE EPE / IEEE ECCE Europe merged conference, accepted Feb. 2012.

[C35]  D. Frost, P.W. Lehn, A. Prodic, “An advanced control method for cascaded SMPS to reduce the energy storage requirements”, IEEE COMPEL, Kyoto, Japan, June 2012, 6 pages.

[C34]  P. Gray, P.W. Lehn, “Time domain derived frequency-domain voltage source converter model for harmonic analysis”, accepted at IEEE ICHQP, Hong Kong, June 2012, 6 pages.

[C33]  G. Kish, P.W. Lehn, “A micro-turbine model for system studies incorporating validated thermodynamic data”, IEEE Power and Energy Society General Meeting, July 2011, 6 pages.

[C32]  C. Sao, P.W. Lehn, “Autonomous load sharing between converters and generators in microgrids”, IEEE Power and Energy Society General Meeting, July 2011, 8 pages.

[C31]  M. Maggiore, B. Rawn, P.W. Lehn, “Invariance kernels for single-input planar nonlinear systems”, American Control Conference, July 2011, pp. 1420-1425.

[C30]  K.L. Lian, P.W. Lehn, “A generalized methodology for obtaining the steady state solution of a closed loop converter”, International Power Electronics Conference 2010, pp. 665-671.

[C29]  B. Rawn, P.W. Lehn, “A method for assessing stability of wind turbines providing grid frequency stabilization”, Nordic Wind Conference, Bornholm, Norway, Sept. 2009.

[C28]  E. Veilleux, P.W. Lehn, “Interconnection of direct-drive wind turbines using a DC grid”, accepted and to be presented at 8^th International Workshop on Large-Scale Integration of Wind Power into Power Systems, Bremen, Germany, Oct. 2009.

[C27]  E. Veilleux, P.W. Lehn, “Interconnection of direct-drive wind turbines using a distributed HVDC converter topology”, accepted and to be presented at IECON, Porto, Portugal, Nov. 2009, 6 pages.

[C26]  D. Fingas, P.W. Lehn, “Operation of parallel three-phase converters as a motor drive”, accepted at IECON, Porto, Portugal, Nov. 2009, 6 pages.

[C25]  A. Hagar, P.W. Lehn, “A scalable multi-input multi-level voltage sourced converter”, Canadian Conference on Electrical and Computer Engineering, May 2009, pp. 265-268.

[C24]  S. Podrucky, P.W. Lehn, “Small signal modelling of power electronic converters with resonant controllers”, International Power Systems Transients Conference, Kyoto, Japan, June 2009, 6 pages.

[C23]  A. Abbas, P.W.Lehn, “PWM based VSC systems – a review”, IEEE PES General Meeting, July 2009

[C22]  A. Abbas, P.W.Lehn, “A unified power delivery solution for integrating DER into distribution networks through VSC based DC Systems”, IEEE PES General Meeting, July 2009

[C21]  J.W.G. Hwang, P.W. Lehn, “Control of ac-dc converters under unbalanced operating conditions using the dc space vector concept”, IEEE PESC, June 2008, pp. 830-836.

[C20]  D. Dolan, P.W. Lehn, “Harmonic mitigation in a virtual air gap variable reactor via control current modulation”, IEEE PES General Meeting, July 2008.

[C19]  D. Dolan, P. W. Lehn, “Finite element analysis of a virtual air gap variable transformer”, Canadian Conference on Electrical and Computer Engineering, July 2008, pp. 891-896.

[C18]  C.K. Sao, P.W. Lehn, “Voltage balancing of converter fed microgrids with single phase loads”, IEEE PES General Meeting, July 2008.

[C17]  J.W.G. Hwang, P.W. Lehn, M. Winkelnkemper, “Control of Grid Connected AC-DC Converters with Minimized DC Link Capacitance under Unbalanced Grid Voltage Condition”, European Power Electronics Conference, Aalborg, Denmark, Sept. 2007, 10 pages.

[C16]  D. Dolan, P.W. Lehn, Analysis of a virtual air gap variable reactor”, IEEE PESC, June 2007, 5 pages.

[C15]  J.W.G. Hwang, M. Winkelnkemper, P.W. Lehn, “Design of an optimal stationary frame controller for grid connected ac-dc converters”, IEEE Industrial Electronics Conference, Paris, France, Nov. 2006, 6 pages.

[C14]  P.W. Lehn, G. Ebner, “Harmonic modelling of thyristor bridges using a simplified time domain method”, IEEE International Conference on Harmonics and Quality of Power, Cascais, Portugal, Oct. 2006, 6 pages.

[C13]  D. Dolan, C.K. Sao, P.W. Lehn, “Voltage flicker model of wind turbine generators due to wind shear and tower shadow”, Porceeding of the CIGRE Canada Conference on Power Systems, Montreal, Oct. 2006, 6 pages.

[C12]  J.W.G. Hwang, M. Winkelnkemper, P.W. Lehn, “Control of AC-DC-AC converters with minimized dc link capacitance under grid distortion”, IEEE Int. Symposium on Industrial Electronics, Montreal, Canada, July 2006, 6 pages.

[C11]  R. K.-L. Lian, P.W. Lehn, “Harmonic analysis of single-phase full bridge rectifiers based on a fast time domain method”, IEEE Int. Symposium on Industrial Electronics, Montreal, Canada, July 2006, 5 pages.

[C10]  J. Li, P.W. Lehn, “Modelling and control of the slow switching voltage source converter”, IEEE Int. Symposium on Industrial Electronics, Montreal, Canada, July 2006, 6 pages.

[C9]  J. Bebic, P.W. Lehn, M.R. Iravani, “A symmetrical hybrid power flow controller – A new concept for flexible AC transmission”, IEEE Power  Engineering Society General Meeting, Montreal, Canada, June 2006, 6 pages.

[C8]  C. K. Sao, P. W. Lehn, “Intentional islanded operation of converter fed networks”, IEEE Power  Engineering Society General Meeting, Montreal, Canada, June 2006, 6 pages.

[C7]  B. Rawn, P. W. Lehn, M. Maggiore, “Toward controlled wind farm output: adjustable power filtering”, IEEE Power Engineering Society General Meeting, Montreal, Canada, June 2006, 6 pages.

[C6]  C.K. Sao, P.W. Lehn, “A block diagram approach to reference frame transformation of converter dynamic models”, CCECE, Ottawa, May 2006, 6 pages.

[C5]  C.K. Sao, D. Dolan, P.W. Lehn, “Lightning exposure of wind turbine generators “, CCECE, Ottawa, Canada, May 2006, 6 pages.

[C4]  D. Dolan, P.W. Lehn, “Real time wind turbine emulator suitable for power quality and dynamic control studies”, International Conference on Power Systems Transients, 2005, 6 pages.

[C3]  E. Wu, P.W. Lehn, “Digital current control of a voltage source converter with active damping of LCL resonance“, Applied Power Electronics Conference, 2005, 8 pages.

[C2]  P. W. Lehn, “A Benchmark System for Simulation of the D-STATCOM”, IEEE Power Engineering Society Winter Meeting, 2002, Volume 1, pp. 496-498.

[C1]  P. Lehn, “Sensitivity to Simulation Method for Power Electronics Circuits”, IEEE Power Engineering Society Winter Meeting, 2001, Volume: 2, pp. 801-802.

 

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