Small Signal Modeling of the Quasi-Z-Source-Inverter and a Novel Control Strategy to Minimize the Influence of Input Voltage Disturbances

  • Autor:

    Thomas Lannert, Matthias Isen, Michael Braun
  • Quelle:

    EPE'13 ECCE Europe, Lille, France

     

     
  • Datum: 3. - 5. September 2013

  • The Quasi-Z-Source-Inverter (QZSI) reveals an asymmetrical L-C-network structure in which unwanted
    oscillations can be triggered by input voltage disturbances (IVD). This paper presents an AC small signal
    model of the QZSI, derived from State Space Averaging, with emphasis on the influence of IVD. After
    the discussion of the small signal model, a novel cascade control strategy is developed to adequately
    compensate the influence of IVD on the DC-link voltage. The effectiveness of the proposed control
    strategy is verified by simulation and experimental results on a laboratory test bench with an induction
    machine as load.