Z SOURCE INVERTER
|PEZ-1||Analysis of Critical Inductance and Capacitor Voltage Ripple for a Bidirectional Z-Source Inverter||An analysis of the critical inductance and capacitor voltage ripple of bidirectional Z-source was presented in this paper.
Varying inductances were found to lead to different operational modes of the inverter. The critical inductance was derived. While the Z-source capacitor voltage ripple is traditionally considered
to be independent of the inductance with large inductance, it was found that dependence exists when small inductors are used. The capacitor voltage ripple was also derived. These theoretical findingshave been verified using both simulations and experimental results.
|PEZ-2||Impedance-Source Networks for Electric Power Conversion Part II: Review of Control and Modulation Techniques||Impedance-source networks cover the entire spectrum of electric power conversion applications (dc–dc, dc–ac,
ac–dc, ac–ac) controlled and modulated by different modulation strategies to generate the desired dc or ac voltage and current at the output. A comprehensive review of various impedance-source network- based power converters has been covered in a previous paper and main topologies were discussed from an application point of view. Now Part II provides a comprehensive review of the
most popular control and modulation strategies for impedance source
network-based over converters/inverters. These methods are compared in terms of theoretical complexity and performance,
when applied to the respective switching topologies. Further, this paper provides as a guide and quick reference for researchers and practicing engineers in deciding which control and modulation
method to consider for an application in a given topology at a certain power level, switching frequency and demanded dynamic response.