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A voltage balancing method for series-connected igbts operating as a fault current limiter in high-voltage dc power supplies

Mohsenzade, S ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1109/TIE.2020.3009606
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2021
  4. Abstract:
  5. This article proposes a high-voltage fault current limiter (HVFCL) for high-voltage dc power supplies (HVdcPSs) which limits the current of the power supply automatically in the short-circuit fault (SCF). The proposed HVFCL is based on the series-connected insulated gate bipolar transistors (IGBTs). The main achievements of this article are the balanced voltage sharing and a very low value of the short-circuit current near to the load nominal current for the series-connected IGBTs during the SCF. These achievements result in a longer maximum permissible short-circuit time. These achievements are obtained by a control strategy that puts the series-connected IGBTs in a specific operating point in the active region during the SCF. Based on the proposed master-slave control strategy, one of the IGBTs is current controlled and rolls as the master. The other IGBTs are voltage controlled and imitate the master IGBT voltage. Consequently, a balanced voltage sharing is guaranteed for the series-connected IGBTs in the SCF. PSPICE simulations and experimental results are provided to verify the proper performance of the proposed HVFCL. © 1982-2012 IEEE
  6. Keywords:
  7. Fault current limiters ; Insulated gate bipolar transistors (IGBT) ; Control strategies ; High voltage DC power supplies ; Master slave control ; P-Spice simulation ; Short circuit time ; Short-circuit fault ; Specific operating point ; Voltage-controlled ; HVDC power transmission
  8. Source: IEEE Transactions on Industrial Electronics ; Volume 68, Issue 9 , 2021 , Pages 7895-7907 ; 02780046 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/9145802