Staffan Norrga

https://www.etis.ee/CV/Staffan_Norrga/est
norrga@kth.se

Teenistuskäik

Töökohad ja ametid
2005–...   
KTH Royal Institute of Technology, Stockholm, Sweden, Dotsent (1,00)
1997–2011   
ABB Corporate Research, Västerås, Sweden, Juhtivteadur (1,00)
01.05.1994–01.11.1994   
Catella Generics AB, Mõõtetehnika insener (1,00)
1994–1997   
Adtranz Sweden AB, Arengu insener (1,00)
 
 
Haridustee
2000–2005   
Kuninglik Tehnikainstituut (KTH), Stockholm, Rootsi, doktorikraad elektrotehnikas "On soft-switching isolated AC/DC converters without auxiliary circuit"
1993–1994   
Stockholm Ülikool, Stockholm, Rootsi, ärijuhtimine kursused
1988–1993   
Linköping Tehnikainstituut, Linköping, Rootsi, magistrikraad rakendusfüüsikas ja elektrotehnikas
 
 
Teadusorganisatsiooniline ja -administratiivne tegevus
2005−...   
Reviewer for the following journals: IEEE Transactions on Power Electronics, IEEE Transactions on Industrial Electronics, IET Power Electronics
2011−2011   
Invited speaker at a plenary session of EPE ECCE, with the title:“VSC HVDC- Past, Present and Future”; tutorial on HVDC entitled:“Power Electronics for High Voltage Direct Current (HVDC) Applications”
2010−2010   
Invited speaker at the ECPE Workshop on Advanced Multilevel Converters on topic “HVDC technology with multilevel converters”
2008−2008   
39th IEEE Power Electronic Specialists Conference in Rhodes, tutorial entitled: “Voltage Source Converters in Transmission Applications”

Kvalifikatsioon

Teaduskraadid
Staffan Norrga, doktorikraad, 2005, (juh) Stefan Östlund, On soft-switching isolated AC/DC converters without auxiliary circuit, KTH Kuninglik Tehnikainstituut.
 
 
Teadustöö põhisuunad
VALDKOND: 4. Loodusteadused ja tehnika; 4.8. Elektrotehnika ja elektroonika; CERCS ERIALA: T190 Elektrotehnika

Publikatsioonid

Klass
Aasta
Publikatsioon
 
1.1.
2017
Bakas, Panagiotis; Harnefors, Lennart; Norrga, Staffan; Nami, Alireza; Ilves, Kalle; Dijkhuizen, Frans; Nee, Hans-Peter. (2017). A review of hybrid topologies combining line-commutated and cascaded full-bridge converters. IEEE Transactions on Power Electronics, 32 (10), 7435−7448.10.1109/TPEL.2016.2631250.
3.1.
2017
Blinov, A.; Tibola, G.; Norrga, S.; Velotto, G. (2017). Cell-Level Power Supply for High-Voltage Modular Multilevel Converters. Proceedings of 19th European Conference on Power Electronics and Applications, 11 to 14 September 2017 in Warsaw, Poland.: 19th European Conference on Power Electronics and Applications, 11 to 14 September 2017 in Warsaw, Poland.. Warsaw, Poland.: IEEE, 1−10.10.23919/EPE17ECCEEurope.2017.8099361.
2.1.
2016
Sharifabadi, Kamran; Harnefors, Lennart; Nee, Hans-Peter; Norrga, Staffan; Teodorescu, Remus (2016). Design, Control, and Application of Modular Multilevel Converters for HVDC Transmission Systems. Wiley-IEEE Press.
1.1.
2015
Ilves, Kalle; Harnefors, Lennart; Norrga, Staffan; Nee, Hans-Peter (2015). Analysis and Operation of Modular Multilevel Converters With Phase-Shifted Carrier PWM. IEEE Transactions on Power Electronics, 30 (1), 268−283.TPEL.2014.2321049 .
3.1.
2015
Blinov, A.; Norrga, S.; Tibola, G. (2015). Operation of Single-Chip MOSFET and IGBT Devices after failure due to repetitive avalanche. Proceedings of the 17th Conference on Power Electronics and Applications (EPE’15-ECCE Europe). Geneva , Switzerland: IEEE, P.1−P.9.
1.1.
2014
Ilves, Kalle; Norrga, Staffan; Harnefors, Lennart; Nee, Hans-Peter (2014). On Energy Storage Requirements in Modular Multilevel Converters. IEEE Transactions on Power Electronics, 29 (1), 77−88.TPEL.2013.2254129.
3.1.
2014
Antonopoulos, Antonios; Ängquist, Lennart; Norrga, Staffan; Ilves, Kalle; Harnefors, Lennart; Nee, Hans-Peter (2014). Modular Multilevel Converter AC Motor Drives With Constant Torque From Zero to Nominal Speed. IEEE Transactions on Industry Applications, 50 (3), 1982−1993.TIA.2013.2286217.
1.1.
2013
Harnefors, Lennart; Antonopoulos, Antonios; Norrga, Staffan; Angquist, Lennart; Nee, Hans-Peter. (2013). Dynamic Analysis of Modular Multilevel Converters. IEEE Transactions on Industrial Electronics, 60 (7), 2526−2537.TIE.2012.2194974 .
1.1.
2012
Ilves, Kalle; Antonopoulos, Antonios; Norrga, Staffan; Nee, Hans-Peter (2012). A New Modulation Method for the Modular Multilevel Converter Allowing Fundamental Switching Frequency. IEEE Transactions on Power Electronics, 27 (8), 3482−3494.TPEL.2012.2185832.
1.1.
2012
Ilves, Kalle; Antonopoulos, Antonios; Norrga, Staffan; Nee, Hans-Peter (2012). Steady-State Analysis of Interaction Between Harmonic Components of Arm and Line Quantities of Modular Multilevel Converters. IEEE Transactions on Power Electronics, 27 (1), 57−68.TPEL.2011.2159809 .
3.1.
2012
Norrga, Staffan; Ängquist, Lennart; Ilves, Kalle (2012). Operating region extension for multilevel converters in HVDC applications by optimisation methods. IET power electronics, 1−6.cp.2012.1987.
3.1.
2009
Meier, Stephan; Kjellqvist, Tommy; Norrga, Staffan; Nee, Hans-Peter (2009). Design considerations for medium-frequency power transformers in offshore wind farms. IEEE Proceedings, 1−12.
1.1.
2008
Norrga, Staffan; Meier, Stephan; Ostlund, Stefan (2008). A Three-Phase Soft-Switched Isolated AC/DC Converter Without Auxiliary Circuit. IEEE Transactions on Industry Applications, 44 (3), 836 −844.10.1109/TIA.2008.921430 .
1.1.
2008
Kjellqvist, Tommy; Ostlund, Stefan; Norrga, Staffan (2008). Active Snubber Circuit for Source Commutated Converters Utilizing the IGBT in the Linear Region. IEEE Transactions on Power Electronics, 23 (5), 2595−2601.TPEL.2008.2002093 .
3.1.
2008
Meier, Stephan; Kuschke, Maren; Norrga, Staffan (2008). Space vector modulation for mutually commutated isolated three-phase converter systems. IEEE Proceedings, 4465−4471.PESC.2008.4592667 .
3.1.
2008
Meier, Stephan; Norrga, Staffan; Nee, Hans-Peter (2008). Control strategies for mutually commutated converter systems without cycloconverter turn-off capability. IEEE Proceedings, 1344−1350.PESC.2008.4592121.
3.1.
2007
Meier, Stephan; Norrga, Staffan; Nee, Hans-Peter (2007). Modulation strategies for a mutually commutated converter system in wind farms. IEEE Proceedings, 1−10.EPE.2007.4417478 .
3.1.
2007
Kjellqvist, Tommy; Norrga, Staffan (2007). Active snubber circuit for source commutated converters utilizing the IGBT in the linear region. IEEE Proceedings, 1−10.EPE.2007.4417408 .
1.1.
2006
Norrga, S (2006). Experimental Study of a Soft-Switched Isolated Bidirectional AC–DC Converter Without Auxiliary Circuit. IEEE Transactions on Power Electronics, 21 (6), 1580−1587.TPEL.2006.882969.
3.1.
2005
Kjellqvist, T.; Norrga, S.; Ostlund, S. (2005). Switching Frequency Limit for Soft-Switching MF Transformer System for AC-fed Traction. IEEE Proceedings, 1678−1684.PESC.2005.1581856 .
3.1.
2005
Norrga, S. (2005). Modulation Strategies for Mutually Commutated Isolated Three-Phase Converter Systems. IEEE Proceedings, 2736−2743.PESC.2005.1582020 .
3.1.
2004
Kjellqvist, T.; Norrga, S.; Ostlund, S. (2004). Design considerations for a medium frequency transformer in a line side power conversion system. IEEE Proceedings, 1, 704−710.PESC.2004.1355834 .
3.1.
2004
Norrga, S (2004). An experimental study of a soft-switched isolated AC/DC converter without auxiliary circuit. IEEE Proceedings, 3, 2406−2412 .PESC.2004.1355498 .
3.1.
2004
Norrga, S.; Meier, S.; Ostlund, S. (2004). A three-phase soft-switched isolated AC/DC converter without auxiliary circuit. IEEE Proceedings, 3, 1768 −1775.IAS.2004.1348710 .
1.1.
2001
Kjaer, P. C. ; Norrga, S.; Ostlund, S. (2001). A primary-switched line-side converter using zero-voltage switching. IEEE Transactions on Industry Applications, 37 (6), 1824−1831.

Tööstusomand

25.04.2018

Staffan Norrga

https://www.etis.ee/CV/Staffan_Norrga/eng
norrga@kth.se
Staffan Norrga was born in Lidingö, Sweden, in 1968. He received the M.Sc. degree in applied physics from Linköping Institute of Technology, Linköping, Sweden, in 1993 and the Ph.D. degree in electrical engineering from the Royal Institute of Technology (KTH), Stockholm, Sweden, in 2005. Between 1994 and 2011, he worked as a Development Engineer at ABB in Västerås, Sweden, in various power-electronics-related areas such as railway traction systems and converters for HVDC power transmission systems. In 2000, he returned to academia to engage in research on new power electronic converters employing soft switching and medium frequency transformers, at the Department of Electric Machines and Power Electronics of the Royal Institute of Technology. He currently holds a position as Associate Professor at the same institution. His research interests include new converter topologies for power transmission applications and grid integration of renewable energy sources. He is the inventor or co-inventor of 11 granted patents and 14 patents pending and has authored or co-authored more than 75 scientific papers published at international conferences or in journals.

Career

Institution(s) and position(s)
2005–...   
KTH Royal Institute of Technology, Stockholm, Sweden, Associate Professor (1,00)
1997–2011   
ABB Corporate Research, Västerås, Sweden, Principal Scientist (1,00)
01.05.1994–01.11.1994   
Catella Generics AB, Engineer in measurement technology (1,00)
1994–1997   
Adtranz Sweden AB, Development engineer (1,00)
 
 
Education
2000–2005   
Royal Institute of Technology (KTH), Stockholm, Sweden, Ph.D. degree in electrical engineering "On soft-switching isolated AC/DC converters without auxiliary circuit"
1993–1994   
Stockholm University, Stockholm, Sweden, Courses in business administration
1988–1993   
Linköping Institute of Technology, Linköping, Sweden, M.Sc. in applied physics and electrical engineering
 
 
R&D related managerial and administrative work
2005−...   
Reviewer for the following journals: IEEE Transactions on Power Electronics, IEEE Transactions on Industrial Electronics, IET Power Electronics
2011−2011   
Invited speaker at a plenary session, with the title:“VSC HVDC- Past, Present and Future”; tutorial on HVDC entitled:“Power Electronics for High Voltage Direct Current (HVDC) Applications”
2010−2010   
Invited speaker at the ECPE Workshop on Advanced Multilevel Converters on topic “HVDC technology with multilevel converters”
2008−2008   
39th IEEE Power Electronic Specialists Conference in Rhodes, tutorial entitled: “Voltage Source Converters in Transmission Applications”

Qualifications

Academic degrees
Staffan Norrga, Doctor's Degree, 2005, (sup) Stefan Östlund, On soft-switching isolated AC/DC converters without auxiliary circuit, KTH Royal Institute of Technology.
 
 
Field of research
FIELD OF RESEARCH: 4. Natural Sciences and Engineering; 4.8. Electrical Engineering and Electronics; CERCS SPECIALITY: T190 Electrical engineering

Publications

Category
Year
Publication
 
1.1.
2017
Bakas, Panagiotis; Harnefors, Lennart; Norrga, Staffan; Nami, Alireza; Ilves, Kalle; Dijkhuizen, Frans; Nee, Hans-Peter. (2017). A review of hybrid topologies combining line-commutated and cascaded full-bridge converters. IEEE Transactions on Power Electronics, 32 (10), 7435−7448.10.1109/TPEL.2016.2631250.
3.1.
2017
Blinov, A.; Tibola, G.; Norrga, S.; Velotto, G. (2017). Cell-Level Power Supply for High-Voltage Modular Multilevel Converters. Proceedings of 19th European Conference on Power Electronics and Applications, 11 to 14 September 2017 in Warsaw, Poland.: 19th European Conference on Power Electronics and Applications, 11 to 14 September 2017 in Warsaw, Poland.. Warsaw, Poland.: IEEE, 1−10.10.23919/EPE17ECCEEurope.2017.8099361.
2.1.
2016
Sharifabadi, Kamran; Harnefors, Lennart; Nee, Hans-Peter; Norrga, Staffan; Teodorescu, Remus (2016). Design, Control, and Application of Modular Multilevel Converters for HVDC Transmission Systems. Wiley-IEEE Press.
1.1.
2015
Ilves, Kalle; Harnefors, Lennart; Norrga, Staffan; Nee, Hans-Peter (2015). Analysis and Operation of Modular Multilevel Converters With Phase-Shifted Carrier PWM. IEEE Transactions on Power Electronics, 30 (1), 268−283.TPEL.2014.2321049 .
3.1.
2015
Blinov, A.; Norrga, S.; Tibola, G. (2015). Operation of Single-Chip MOSFET and IGBT Devices after failure due to repetitive avalanche. Proceedings of the 17th Conference on Power Electronics and Applications (EPE’15-ECCE Europe). Geneva , Switzerland: IEEE, P.1−P.9.
1.1.
2014
Ilves, Kalle; Norrga, Staffan; Harnefors, Lennart; Nee, Hans-Peter (2014). On Energy Storage Requirements in Modular Multilevel Converters. IEEE Transactions on Power Electronics, 29 (1), 77−88.TPEL.2013.2254129.
3.1.
2014
Antonopoulos, Antonios; Ängquist, Lennart; Norrga, Staffan; Ilves, Kalle; Harnefors, Lennart; Nee, Hans-Peter (2014). Modular Multilevel Converter AC Motor Drives With Constant Torque From Zero to Nominal Speed. IEEE Transactions on Industry Applications, 50 (3), 1982−1993.TIA.2013.2286217.
1.1.
2013
Harnefors, Lennart; Antonopoulos, Antonios; Norrga, Staffan; Angquist, Lennart; Nee, Hans-Peter. (2013). Dynamic Analysis of Modular Multilevel Converters. IEEE Transactions on Industrial Electronics, 60 (7), 2526−2537.TIE.2012.2194974 .
1.1.
2012
Ilves, Kalle; Antonopoulos, Antonios; Norrga, Staffan; Nee, Hans-Peter (2012). A New Modulation Method for the Modular Multilevel Converter Allowing Fundamental Switching Frequency. IEEE Transactions on Power Electronics, 27 (8), 3482−3494.TPEL.2012.2185832.
1.1.
2012
Ilves, Kalle; Antonopoulos, Antonios; Norrga, Staffan; Nee, Hans-Peter (2012). Steady-State Analysis of Interaction Between Harmonic Components of Arm and Line Quantities of Modular Multilevel Converters. IEEE Transactions on Power Electronics, 27 (1), 57−68.TPEL.2011.2159809 .
3.1.
2012
Norrga, Staffan; Ängquist, Lennart; Ilves, Kalle (2012). Operating region extension for multilevel converters in HVDC applications by optimisation methods. IET power electronics, 1−6.cp.2012.1987.
3.1.
2009
Meier, Stephan; Kjellqvist, Tommy; Norrga, Staffan; Nee, Hans-Peter (2009). Design considerations for medium-frequency power transformers in offshore wind farms. IEEE Proceedings, 1−12.
1.1.
2008
Norrga, Staffan; Meier, Stephan; Ostlund, Stefan (2008). A Three-Phase Soft-Switched Isolated AC/DC Converter Without Auxiliary Circuit. IEEE Transactions on Industry Applications, 44 (3), 836 −844.10.1109/TIA.2008.921430 .
1.1.
2008
Kjellqvist, Tommy; Ostlund, Stefan; Norrga, Staffan (2008). Active Snubber Circuit for Source Commutated Converters Utilizing the IGBT in the Linear Region. IEEE Transactions on Power Electronics, 23 (5), 2595−2601.TPEL.2008.2002093 .
3.1.
2008
Meier, Stephan; Kuschke, Maren; Norrga, Staffan (2008). Space vector modulation for mutually commutated isolated three-phase converter systems. IEEE Proceedings, 4465−4471.PESC.2008.4592667 .
3.1.
2008
Meier, Stephan; Norrga, Staffan; Nee, Hans-Peter (2008). Control strategies for mutually commutated converter systems without cycloconverter turn-off capability. IEEE Proceedings, 1344−1350.PESC.2008.4592121.
3.1.
2007
Meier, Stephan; Norrga, Staffan; Nee, Hans-Peter (2007). Modulation strategies for a mutually commutated converter system in wind farms. IEEE Proceedings, 1−10.EPE.2007.4417478 .
3.1.
2007
Kjellqvist, Tommy; Norrga, Staffan (2007). Active snubber circuit for source commutated converters utilizing the IGBT in the linear region. IEEE Proceedings, 1−10.EPE.2007.4417408 .
1.1.
2006
Norrga, S (2006). Experimental Study of a Soft-Switched Isolated Bidirectional AC–DC Converter Without Auxiliary Circuit. IEEE Transactions on Power Electronics, 21 (6), 1580−1587.TPEL.2006.882969.
3.1.
2005
Kjellqvist, T.; Norrga, S.; Ostlund, S. (2005). Switching Frequency Limit for Soft-Switching MF Transformer System for AC-fed Traction. IEEE Proceedings, 1678−1684.PESC.2005.1581856 .
3.1.
2005
Norrga, S. (2005). Modulation Strategies for Mutually Commutated Isolated Three-Phase Converter Systems. IEEE Proceedings, 2736−2743.PESC.2005.1582020 .
3.1.
2004
Kjellqvist, T.; Norrga, S.; Ostlund, S. (2004). Design considerations for a medium frequency transformer in a line side power conversion system. IEEE Proceedings, 1, 704−710.PESC.2004.1355834 .
3.1.
2004
Norrga, S (2004). An experimental study of a soft-switched isolated AC/DC converter without auxiliary circuit. IEEE Proceedings, 3, 2406−2412 .PESC.2004.1355498 .
3.1.
2004
Norrga, S.; Meier, S.; Ostlund, S. (2004). A three-phase soft-switched isolated AC/DC converter without auxiliary circuit. IEEE Proceedings, 3, 1768 −1775.IAS.2004.1348710 .
1.1.
2001
Kjaer, P. C. ; Norrga, S.; Ostlund, S. (2001). A primary-switched line-side converter using zero-voltage switching. IEEE Transactions on Industry Applications, 37 (6), 1824−1831.

Industrial property

25.04.2018
Detailne otsing
  • Leitud 25 kirjet
PublikatsioonAutoridAastaVäljaande pealkiriKlassifikaatorFailAsutused
A review of hybrid topologies combining line-commutated and cascaded full-bridge converters Bakas, Panagiotis; Harnefors, Lennart; Norrga, Staffan; Nami, Alireza; Ilves, Kalle; Dijkhuizen, Frans; Nee, Hans-Peter.2017IEEE Transactions on Power Electronics1.1.
Cell-Level Power Supply for High-Voltage Modular Multilevel ConvertersBlinov, A.; Tibola, G.; Norrga, S.; Velotto, G.2017Proceedings of 19th European Conference on Power Electronics and Applications, 11 to 14 September 2017 in Warsaw, Poland.3.1.Tallinna Tehnikaülikool, Inseneriteaduskond, Elektroenergeetika ja mehhatroonika instituut
Design, Control, and Application of Modular Multilevel Converters for HVDC Transmission SystemsSharifabadi, Kamran; Harnefors, Lennart; Nee, Hans-Peter; Norrga, Staffan; Teodorescu, Remus 2016Design, Control, and Application of Modular Multilevel Converters for HVDC Transmission Systems2.1.
Analysis and Operation of Modular Multilevel Converters With Phase-Shifted Carrier PWM Ilves, Kalle; Harnefors, Lennart; Norrga, Staffan; Nee, Hans-Peter 2015IEEE Transactions on Power Electronics1.1.
Operation of Single-Chip MOSFET and IGBT Devices after failure due to repetitive avalancheBlinov, A.; Norrga, S.; Tibola, G.2015Proceedings of the 17th Conference on Power Electronics and Applications (EPE’15-ECCE Europe)3.1.Tallinna Tehnikaülikool, Energeetikateaduskond, Elektrotehnika instituut
On Energy Storage Requirements in Modular Multilevel Converters Ilves, Kalle; Norrga, Staffan; Harnefors, Lennart; Nee, Hans-Peter 2014IEEE Transactions on Power Electronics1.1.
Modular Multilevel Converter AC Motor Drives With Constant Torque From Zero to Nominal SpeedAntonopoulos, Antonios; Ängquist, Lennart; Norrga, Staffan; Ilves, Kalle; Harnefors, Lennart; Nee, Hans-Peter2014IEEE Transactions on Industry Applications3.1.
Dynamic Analysis of Modular Multilevel Converters Harnefors, Lennart; Antonopoulos, Antonios; Norrga, Staffan; Angquist, Lennart; Nee, Hans-Peter.2013IEEE Transactions on Industrial Electronics1.1.
A New Modulation Method for the Modular Multilevel Converter Allowing Fundamental Switching Frequency Ilves, Kalle; Antonopoulos, Antonios; Norrga, Staffan; Nee, Hans-Peter 2012IEEE Transactions on Power Electronics1.1.
Steady-State Analysis of Interaction Between Harmonic Components of Arm and Line Quantities of Modular Multilevel ConvertersIlves, Kalle; Antonopoulos, Antonios; Norrga, Staffan; Nee, Hans-Peter 2012IEEE Transactions on Power Electronics1.1.
Operating region extension for multilevel converters in HVDC applications by optimisation methodsNorrga, Staffan; Ängquist, Lennart; Ilves, Kalle 2012IET power electronics3.1.
Design considerations for medium-frequency power transformers in offshore wind farms Meier, Stephan; Kjellqvist, Tommy; Norrga, Staffan; Nee, Hans-Peter 2009IEEE Proceedings3.1.
A Three-Phase Soft-Switched Isolated AC/DC Converter Without Auxiliary Circuit Norrga, Staffan; Meier, Stephan; Ostlund, Stefan2008IEEE Transactions on Industry Applications1.1.
Active Snubber Circuit for Source Commutated Converters Utilizing the IGBT in the Linear Region Kjellqvist, Tommy; Ostlund, Stefan; Norrga, Staffan 2008IEEE Transactions on Power Electronics1.1.
Control strategies for mutually commutated converter systems without cycloconverter turn-off capability Meier, Stephan; Norrga, Staffan; Nee, Hans-Peter 2008IEEE Proceedings3.1.
Space vector modulation for mutually commutated isolated three-phase converter systems Meier, Stephan; Kuschke, Maren; Norrga, Staffan 2008IEEE Proceedings3.1.
Active snubber circuit for source commutated converters utilizing the IGBT in the linear region Kjellqvist, Tommy; Norrga, Staffan2007IEEE Proceedings3.1.
Modulation strategies for a mutually commutated converter system in wind farms Meier, Stephan; Norrga, Staffan; Nee, Hans-Peter 2007IEEE Proceedings3.1.
Experimental Study of a Soft-Switched Isolated Bidirectional AC–DC Converter Without Auxiliary CircuitNorrga, S2006IEEE Transactions on Power Electronics1.1.
Modulation Strategies for Mutually Commutated Isolated Three-Phase Converter Systems Norrga, S.2005IEEE Proceedings3.1.
Switching Frequency Limit for Soft-Switching MF Transformer System for AC-fed Traction Kjellqvist, T.; Norrga, S.; Ostlund, S.2005IEEE Proceedings3.1.
A three-phase soft-switched isolated AC/DC converter without auxiliary circuit Norrga, S.; Meier, S.; Ostlund, S.2004IEEE Proceedings3.1.
An experimental study of a soft-switched isolated AC/DC converter without auxiliary circuit Norrga, S2004IEEE Proceedings3.1.
Design considerations for a medium frequency transformer in a line side power conversion system Kjellqvist, T.; Norrga, S.; Ostlund, S.2004IEEE Proceedings3.1.
A primary-switched line-side converter using zero-voltage switching Kjaer, P. C. ; Norrga, S.; Ostlund, S. 2001IEEE Transactions on Industry Applications1.1.