Analysis of a three phase capacitor voltage balanced hybrid multi-level inverter with a three phase RL-load

  • Abstract
  • Keywords
  • References
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  • Abstract

    This paper outlined the basic concepts of two selected types of hybrid multi-level inverters that were capacitor voltage-source dependent. A natural capacitor voltage balancing involving hysteresis with redundant switching states was analyzed in this paper. Simulations using MATLAB 7.14 were carried out for an unbalanced and a well-balanced capacitor voltage supply under 0V, 100V and 200V pre-charged capacitor voltage conditions. A comparative analysis of the two types of hybrid multi-level inverters (Type A and Type B) with pertinent to %THD values of [35.77% and 23.79%] for Type A and [92.10% and 84.94%] for type B during fault occurrence were evaluated in this work. These harmonic values can lead to thermal run away and total malfunction of the semi-conductor switches. An experimental vali-dation of Type A hybrid multi-level inverter with a three level flying capacitor input stage and H-bridge output stage using a three phase RL-Load of 15Ω and 45mH was accomplished in the laboratory with results compared with the simulations for experimental verification.



  • Keywords

    Capacitor Voltage Balancing; Hybrid Multi-Level Converters; Hysteresis; Redundant Switching States; Simulations; %THD, RL-Load Design and Experimental Set Up.

  • References

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Article ID: 29969
DOI: 10.14419/ijet.v9i1.29969

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