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This article represents a new single-phase inverter having an enhanced boost and improved THD at the load end. This research also represents a cascaded quasi-Z-source impedance network inverter containing a modified unipolar SPWM switching scheme. It is observed that modified unipolar PWM schemes having additional boost switch employed on a QZSI inverter circuit results larger boost voltage/current and improved THD at its load. In this study, the working principle of the modified unipolar SPWM technique and the proposed cascaded QZSI are discussed. MATLAB/Simulink simulation software was used to perform all the simulations. The presented technique results a 39% larger boost than the QZSI topology with a modified switch technique. In addition to that, it gives us a lower THD than the traditional QZSI topologies, with a value of 0.91%.

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The Design of a New Single Phase Cascaded Quasi-Z-Source Inverter with High Boost and Better THD

  • 会议论文

  • 发表日期：

    2026年

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  • M. Chiranjivi,
  • K. Suresh,
  • Ch. Lokeshwar Reddy,
  • M. Siddartha,
  • M. Rani

摘要

This article represents a new single-phase inverter having an enhanced boost and improved THD at the load end. This research also represents a cascaded quasi-Z-source impedance network inverter containing a modified unipolar SPWM switching scheme. It is observed that modified unipolar PWM schemes having additional boost switch employed on a QZSI inverter circuit results larger boost voltage/current and improved THD at its load. In this study, the working principle of the modified unipolar SPWM technique and the proposed cascaded QZSI are discussed. MATLAB/Simulink simulation software was used to perform all the simulations. The presented technique results a 39% larger boost than the QZSI topology with a modified switch technique. In addition to that, it gives us a lower THD than the traditional QZSI topologies, with a value of 0.91%.