Comparison of load inverter topologies in a bipolar LVDC-distribution

Authors

  • J. Rekola Author
  • H. Tuusa Author

DOI:

https://doi.org/10.24084/repqj09.416

Abstract

Low voltage direct current (LVDC) distribution is a new low voltage distribution concept. Potential inverter topologies for a bipolar LVDC 1500 V distribution system are compared. Two- or three-level single-phase half or full bridges or three-phase load inverters can be used in LVDC distribution. Inverters can be connected to 750 V DC or 1500 V DC. The bases of comparison are the size of required LC-filters, voltage and current stresses of the components, capability to operate with reduced DC voltage and feed half-wave rectifying load. Two different LC-filter design methods are used. According to the simulation results, the most suitable singlephase load inverter topologies connected to 750 V DC are twoand three-level full bridges. The structure of three-level inverters is more complex, but the size of the required passive filter components is just half of the size of the components with twolevel inverters. The difference between LC-filter sizes is not so significant when comparing with two-and three-level inverters connected to 1500 V DC. The maximum voltage stresses of the IGBTcomponents are udc/2 in three-level inverters but udc in two-level inverters. Smaller voltage stresses are a remarkable advantage especially at higher voltage levels.

Author Biographies

  • J. Rekola

    Department of Electrical Energy Engineering

    Tampere University of Technology

    P.O. Box 692, 33101 Tampere, Finland

    Phone number: +358 401981519, e-mail: jenni.rekola@tut.fi

  • H. Tuusa

     

    Department of Electrical Energy Engineering

    Tampere University of Technology

    P.O. Box 692, 33101 Tampere, Finland

    Phone number: +358 401981519, e-mail: heikki.tuusa@tut.fi

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Published

2024-01-17

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Articles