IHE / Employees / Researchers and Lecturers / Krzysztof Rafal, Ph.D.

Krzysztof Rafal, Ph.D.

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Assistant professor

Rational Use of Energy Division, room 405A,

e-mail: krafal@itc.pw.edu.pl, tel. 22 234 52 02

  

Key research areas

  • Grid-connected power electronic converters
  • Control i power electronics
  • Power electronic RES interfaces
  • Smart Grid
  • Microsources

Teaching courses

  • Electric circuits
  • Electronics
  • Electric Power Systems

Proposed topics for diploma theses

Topics can be discussed individually.

Offered topics include:

  • Renewable Energy Sources in power system,
  • Electrical energy microsources (mainly small wind turbines),
  • Grid-connected power electronic converters (RES interfaces, FACTS, HVDC),
  • Power quality, energy efficiency,
  • Power electronics (rectifiers, inverters, DC-DC converters),
  • Electric and electronic eqipment in airplanes.

Academic achevements

Journal publications:

[1] K. Możdżyński, K. Rafał, M. Bobrowska-Rafał, "Application of the second order generalized integrator in digital control systems", Archives of Electrical Engineering, nr 3/2014.

[2] T. Gajowik, K. Rafał, M. Bobrowska-Rafał, "Dwukierunkowy przekształtnik DC-DC w topologii trójfazowego podwójnego mostka aktywnego", Przegląd Elektrotechniczny, nr 5/2014.

[3] K. Rafał, Marian P. Kaźmierkowski, „Sterowanie układem STATCOM z zasobnikiem energii z kompensacją wyższych harmonicznych i symetryzacją napięć”, Przegląd Elektrotechniczny, nr. 12/2012.

[4] K. Rafał, M. Bobrowska-Rafał, M. Jasiński, „Sterowanie przekształtnikiem AC-DC-AC elektrowni wiatrowej z magazynem energii w sieciowym i autonomicznym trybie pracy”, Przegląd Elektrotechniczny, nr. 4/2012.

[5] S. Piasecki, M. Jasiński, K. Rafał, M. Korzeniewski , A. Milicua, “Higher Harmonics Compensation In Grid-Connected PWM Converters For Renewable Energy Interface And Active Filtering”, Przegląd Elektrotechniczny, nr. 6/2011.

[6] M. Bobrowska-Rafał, K. Rafał,  M. Jasiński, M.P. Kaźmierkowski, “Grid Synchronization and Symmetrical Components Extraction with PLL Algorithm for Grid Connected Power Electronic Converters – A Review”, Bulletin of the Polish Academy of Sciences: Technical Sciences, vol. 59, no. 4, 2011.

[7] M. Bobrowska-Rafał, K. Rafał, G. Abad, M. Jasinski, „Control of PWM rectifier under grid voltage dips”, Bulletin of Polish Academy of Sciences: Technical Sciences, vol. 57, no. 4, 2009.

Conference publications:

[1] T. Gajowik, K. Rafał, M. Bobrowska-Rafał, ”Dwukierunkowy przekształtnik DC-DC w topologii trójfazowego podwójnego mostka aktywnego”, Sterowanie w Energoelektronice i Napędzie Elektrycznym SENE 2013, 20-22.11.2013, Łódź, Polska.

[2] K. Możdżyński, M. Bobrowska-Rafał, K. Rafał, „Zastosowania układu całkującego drugiego rzędu w cyfrowych systemach sterowania urządzeń energoelektronicznych”, Sterowanie w Energoelektronice i Napędzie Elektrycznym SENE 2013, 20-22.11.2013, Łódź, Polska.

[3] K. Rafał, M. Bobrowska-Rafał, M. Jasiński, „Sterowanie przekształtnikiem AC-DC-AC elektrowni wiatrowej z magazynem energii w sieciowym i autonomicznym trybie pracy”, Sterowanie w Energoelektronice i Napędzie Elektrycznym SENE 2011, 16-18.11.2011, Łódź, Polska. (referat wygłoszony osobiście)

[4] M. Jasinski, K. Rafał, M. Bobrowska-Rafał, S. Piasecki, "Grid Interfacing of Distributed Sources by Three-Level btb NPC Converter with Energy Flow Control", Workshop on Power Electronics for Industrial Applications and Renewable Energy Conversion PEIA 2011, 3-4.11.2011, Doha, Katar.

[5] M.Jasinski, K.Rafał, M. Bobrowska-Rafał, S. Piasecki, "Grid Interfacing of Distributed Energy Sources by Three-Level BtB NPC Converter under Distorted Grid Voltage", Workshop on Predictive Control of Electrical Drives and Power Electronics PRECEDE 2011, 14-15.10.2011, Monachium, Niemcy.

[6] K. Rafał, M. Bobrowska-Rafał, S. Piasecki, M. Jasinski, „Coordinated Control of Grid-Connected Three-Level NPC Converter under Distorted Grid Voltage”, 20th IEEE International Symposium on Industrial Electronics ISIE 2011, 27-30.07.2011, Gdańsk, Polska. (referat wygłoszony osobiście)

[7] K. Rafał, M. Bobrowska “Synchronization of Three-Phase PWM Rectifiers with Unbalanced and Distorted Grid Voltage”, Young scientists towards the challenges of modern technology, 13-16.09.2010, Warszawa, Polska. (referat wygłoszony osobiście)

[8] M. Bobrowska, K. Rafał, S. Piasecki, M. Jasinski „Resonant Controller for Higher Harmonics Compensation In PWM rectifiers”, Young scientists towards the challenges of modern technology, 13-16.09.2010, Warszawa, Polska.

[9] K. Rafał, B. Morin, X. Roboam, E. Bru, C. Turpin, H. Piquet, „Hybridization of an aircraft emergency electrical network: experimentation and benefits validation”, IEEE Vehicle Power and Propulsion Conference VPPC 2010, 1-3.09.2010, Lille, Francja.

[10] A. Milicua, S. Piasecki, M. Rolak, M. Bobrowska, K. Rafał: “Comprehensive Study of Active Filter based on Experimental Analysis”, 9th International Workshop on Electronics, Control, Modelling, Measurement and Signals ECMS 2009, 8-10.07.2009, Mondragon, Hiszpania.

[11] A. Milicua, S. Piasecki, M. Bobrowska, K. Rafał, G. Abad: “Coordinated Control for Grid Connected Power Electronic Converters Under the Presence of Voltage Dips and Harmonics”, 13th International European Power Electronics Conference EPE 2009, 8-10.09.2009, Barcelona, Hiszpania.

[12] M. Bobrowska, K. Rafał, A. Milicua, M. P. Kazmierkowski: „Improved Voltage Oriented Control of AC-DC Converter under Balanced and Unbalanced Grid Voltage Dips” , IEEE EUROCON 2009, 18-23.05.2009, Saint Petersburg, Rosja.

[13] K. Rafał, M. Bobrowska, J. A. Barrena, M. P. Kazmierkowski: „Component minimized AC/DC/AC converter with DC-Link Capacitors voltages balancing”, IEEE EUROCON 2009, 18-23.05.2009, Saint Petersburg, Rosja. (referat wygłoszony osobiście)

Research projects:

[1]  "Development of 5kW and 10kW Small Wind Turbine Technology", GEKON prgram by National Centre for Research and development", project manager, 10.2014-09.2016, cooperation of WUT and companies MBIZ, SWIND.

[2] “Integrated system of energy storage and power electronic converter for electrical power quality improvement”, Ventures program founded by Foundation for Polish Science, project manager, 02.2011-09.2012, Warsaw University of Technology.

[3] Project of voltage dip mitigation device for industrial areas and consumers with higher power quality demand”, expertise for polish TSO - PSE Operator S.A., main executor, 07.2010-09.2011, Warsaw University of Technology.

[4]  „Development of AC/DC converters for the distributed energy sources with increased immunity to voltage distortion and reduced negative impact on the network (5 - 400 kVA Series)”, Development Project founded by polish Ministry of Science  nr N R01 0014 06/2009, 10.2009–09.2012,  Warsaw University of Technology.

[5] ”Study and analysis of cooperation of AC/DC/AC converter with power grid during voltage distortions and failures”, Research Project founded by polish Ministry of Science Nr N N510 331637, 10.2009–09.2011,  Warsaw University of Technology. 

[6] “Hybrydization of electrical power sources by means of supercapacitors”, main researcher, 09.2009–02.2010, ENSEEIHT / Laplace Laboratory, Toulouse, France.

Patents:

Patent UPRP nr P.401702 „Układ sterowania przekształtnikiem AC-DC-AC”, M. Jasiński (50%), K. Rafał (50%).

Awards:

[1] Winner of VENTURES program, Foundation for Polish Science,  2011.

[2] Best paper award in Mechanics, Automation and Robotics track on Young Scientists Towards The Challenges Of Modern Technology conference, Warsaw, 13-16.09.2010.

[3] 2nd award for best thesis in contest organized by Electrical Department, WUT and Huettinger Electronic, 2008.