Open AccessReference Disposition Modulation Method for non‐ideal Dual Z‐Source Neutral‐Point‐Clamped Inverter
Author(s) -
Roomi Muhammad M.,
Maswood Ali I.,
Dehghani Tafti Hossein,
Harikrishna Raj Pinkymol
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0124
Subject(s) - modulation index , inverter , boosting (machine learning) , modulation (music) , matlab , voltage , electronic engineering , computer science , control theory (sociology) , pulse width modulation , voltage source , power (physics) , output impedance , engineering , electrical engineering , physics , artificial intelligence , control (management) , quantum mechanics , acoustics , operating system
A single stage Z‐source Neutral‐Point‐Clamped (NPC) inverter for buck‐boost conversion is considered as a better alternative for the two‐staged energy conversion in traditional inverters. The Dual Z‐Source Network (DZSN) uses two distinct X‐shaped impedance networks to connect two individual dc sources to the inverter circuit. The output voltage boosting can be achieved by selectively shooting‐through the power sources in the dual networks. This study proposes a novel modulation method for integrating the shoot‐through state to the traditional inverter switching. The performance of the proposed modulation method for DZSN is examined utilising attributes which include, voltage boosting, switching losses, efficiency, etc. In addition, this study also deals with non‐ideal DZSN, where the circuit resistance and their respective voltage drops are considered. The presented modulation method uses a single carrier signal which is compared with two sets of sinusoidal reference signals to establish the switching. The theoretical findings of the proposed modulation method are verified using Matlab/Simulink and PSIM software. Moreover, an experimental NPC prototype was built and the results for the different values of modulation index are presented, which validate the applicability of proposed modulation method.