Analytical determination of conduction losses for modified flying capacitor multicell converters

Vahid Dargahi, Arash Khoshkbar-Sadigh, Keith Corzine

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Multilevel converters are mostly applied for medium-voltage high-power applications. Flying-capacitor-based multilevel converters such as flying capacitor multicell (FCM) and modified FCM (MFCM) are promising breeds of multilevel converters. Considering the advantages of MFCM converter over conventional FCM converter, and noting that conduction power loss investigation can be very advantageous in the design phase of multilevel converters, this paper presents an analytical approach to calculate and analyze conduction power losses in MFCM converters. First, the rms and average currents of the insulated-gate bipolar transistors (IGBTs) and anti-parallel diodes are analytically calculated by considering the associated duty cycle of each IGBT/diode in terms of the converter modulation index, load current, and load power factor. Numerical results of the derived closed-form equations to calculate the rms and average currents of IGBTs/diodes are compared with simulation results. All the simulation and analytic results agree well with each other which validate the derived closed-form equations. Afterwards, the obtained equations for rms and average current computations are utilized to calculate the conduction power losses in a 12.4MVA 3.3kV 9-level (line-to-line) MFCM converter. A 2.5kV 1.5kA IGBT module from ABB is considered as the power switch in the performed study for MFCM converter.

Original languageEnglish (US)
Title of host publication2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2840-2846
Number of pages7
ISBN (Electronic)9781467383936
DOIs
StatePublished - May 10 2016
Event31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 - Long Beach, United States
Duration: Mar 20 2016Mar 24 2016

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2016-May

Other

Other31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016
CountryUnited States
CityLong Beach
Period3/20/163/24/16

Fingerprint

Insulated gate bipolar transistors (IGBT)
Capacitors
Diodes
Switches
Modulation
Electric potential

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Dargahi, V., Khoshkbar-Sadigh, A., & Corzine, K. (2016). Analytical determination of conduction losses for modified flying capacitor multicell converters. In 2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016 (pp. 2840-2846). [7468267] (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2016-May). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2016.7468267
Dargahi, Vahid ; Khoshkbar-Sadigh, Arash ; Corzine, Keith. / Analytical determination of conduction losses for modified flying capacitor multicell converters. 2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016. Institute of Electrical and Electronics Engineers Inc., 2016. pp. 2840-2846 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).
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title = "Analytical determination of conduction losses for modified flying capacitor multicell converters",
abstract = "Multilevel converters are mostly applied for medium-voltage high-power applications. Flying-capacitor-based multilevel converters such as flying capacitor multicell (FCM) and modified FCM (MFCM) are promising breeds of multilevel converters. Considering the advantages of MFCM converter over conventional FCM converter, and noting that conduction power loss investigation can be very advantageous in the design phase of multilevel converters, this paper presents an analytical approach to calculate and analyze conduction power losses in MFCM converters. First, the rms and average currents of the insulated-gate bipolar transistors (IGBTs) and anti-parallel diodes are analytically calculated by considering the associated duty cycle of each IGBT/diode in terms of the converter modulation index, load current, and load power factor. Numerical results of the derived closed-form equations to calculate the rms and average currents of IGBTs/diodes are compared with simulation results. All the simulation and analytic results agree well with each other which validate the derived closed-form equations. Afterwards, the obtained equations for rms and average current computations are utilized to calculate the conduction power losses in a 12.4MVA 3.3kV 9-level (line-to-line) MFCM converter. A 2.5kV 1.5kA IGBT module from ABB is considered as the power switch in the performed study for MFCM converter.",
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Dargahi, V, Khoshkbar-Sadigh, A & Corzine, K 2016, Analytical determination of conduction losses for modified flying capacitor multicell converters. in 2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016., 7468267, Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, vol. 2016-May, Institute of Electrical and Electronics Engineers Inc., pp. 2840-2846, 31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016, Long Beach, United States, 3/20/16. https://doi.org/10.1109/APEC.2016.7468267

Analytical determination of conduction losses for modified flying capacitor multicell converters. / Dargahi, Vahid; Khoshkbar-Sadigh, Arash; Corzine, Keith.

2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016. Institute of Electrical and Electronics Engineers Inc., 2016. p. 2840-2846 7468267 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2016-May).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Multilevel converters are mostly applied for medium-voltage high-power applications. Flying-capacitor-based multilevel converters such as flying capacitor multicell (FCM) and modified FCM (MFCM) are promising breeds of multilevel converters. Considering the advantages of MFCM converter over conventional FCM converter, and noting that conduction power loss investigation can be very advantageous in the design phase of multilevel converters, this paper presents an analytical approach to calculate and analyze conduction power losses in MFCM converters. First, the rms and average currents of the insulated-gate bipolar transistors (IGBTs) and anti-parallel diodes are analytically calculated by considering the associated duty cycle of each IGBT/diode in terms of the converter modulation index, load current, and load power factor. Numerical results of the derived closed-form equations to calculate the rms and average currents of IGBTs/diodes are compared with simulation results. All the simulation and analytic results agree well with each other which validate the derived closed-form equations. Afterwards, the obtained equations for rms and average current computations are utilized to calculate the conduction power losses in a 12.4MVA 3.3kV 9-level (line-to-line) MFCM converter. A 2.5kV 1.5kA IGBT module from ABB is considered as the power switch in the performed study for MFCM converter.

AB - Multilevel converters are mostly applied for medium-voltage high-power applications. Flying-capacitor-based multilevel converters such as flying capacitor multicell (FCM) and modified FCM (MFCM) are promising breeds of multilevel converters. Considering the advantages of MFCM converter over conventional FCM converter, and noting that conduction power loss investigation can be very advantageous in the design phase of multilevel converters, this paper presents an analytical approach to calculate and analyze conduction power losses in MFCM converters. First, the rms and average currents of the insulated-gate bipolar transistors (IGBTs) and anti-parallel diodes are analytically calculated by considering the associated duty cycle of each IGBT/diode in terms of the converter modulation index, load current, and load power factor. Numerical results of the derived closed-form equations to calculate the rms and average currents of IGBTs/diodes are compared with simulation results. All the simulation and analytic results agree well with each other which validate the derived closed-form equations. Afterwards, the obtained equations for rms and average current computations are utilized to calculate the conduction power losses in a 12.4MVA 3.3kV 9-level (line-to-line) MFCM converter. A 2.5kV 1.5kA IGBT module from ABB is considered as the power switch in the performed study for MFCM converter.

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Dargahi V, Khoshkbar-Sadigh A, Corzine K. Analytical determination of conduction losses for modified flying capacitor multicell converters. In 2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016. Institute of Electrical and Electronics Engineers Inc. 2016. p. 2840-2846. 7468267. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). https://doi.org/10.1109/APEC.2016.7468267