A generalized discontinuous PWM based neutral point voltage balancing method for three-level NPC voltage source inverter with switching losses reduction

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Abstract

In order to control the neutral point voltage of inverter with discontinuous PWM (DPWM), this paper proposed a generalized discontinuous PWM (GDPWM) based neutral point voltage balancing method for three level neutral point clamped (NPC) voltage source inverter (VSI). Firstly, a triangle carrier based (TCB-GDPWM) is proposed. Secondly, the affection on neutral point voltage for the modulation wave are analyzed. Base on the analysis, a bang-bang control is adept to control the neutral point voltage via changing the polarity of the certain part of the common mode voltage (CMV). Finally, the proposed method is verified by simulation and experiment. The results show that the propose method has good performance at neutral point voltage control and switching losses reduction.
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Details

In order to control the neutral point voltage of inverter with discontinuous PWM (DPWM), this paper proposed a generalized discontinuous PWM (GDPWM) based neutral point voltage balancing method for three level neutral point clamped (NPC) voltage source inverter (VSI). Firstly, a triangle carrier based (TCB-GDPWM) is proposed. Secondly, the affection on neutral point voltage for the modulation wave are analyzed. Base on the analysis, a bang-bang control is adept to control the neutral point voltage via changing the polarity of the certain part of the common mode voltage (CMV). Finally, the proposed method is verified by simulation and experiment. The results show that the propose method has good performance at neutral point voltage control and switching losses reduction.
Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE Applied Power Electronics Conference and Exposition (APEC)
Number of pages5
PublisherIEEE Press
Publication dateMar 2017
Pages1816-1820
Article number7930945
ISBN (Electronic)9781509053667
DOI
StatePublished - Mar 2017
Publication categoryResearch
Peer-reviewedYes
Event2017 IEEE Applied Power Electronics Conference and Exposition (APEC) - Tampa Convention Center, Tampa, FL, United States
Duration: 26 Mar 201730 Mar 2017

Conference

Conference2017 IEEE Applied Power Electronics Conference and Exposition (APEC)
LocationTampa Convention Center
LandUnited States
ByTampa, FL
Periode26/03/201730/03/2017

    Research areas

  • Common mode voltage, Discontinuous PWM, Neutral point voltage balancing, Three level neutral point clamped inverter
ID: 260307786