Open AccessPerformance evaluation of a reduced components count single‐phase asymmetric multilevel inverter with low standing voltage
Author(s) -
Bana Prabhat Ranjan,
Panda Kaibalya Prasad,
Panda Gayadhar
Publication year - 2020
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/2050-7038.12430
Subject(s) - boosting (machine learning) , matlab , pulse width modulation , voltage , computer science , electronic engineering , inverter , renewable energy , electrical engineering , engineering , machine learning , operating system
Summary The conventional multilevel inverter (MLI) uses a large number of switches and isolated dc sources. These conventional MLIs increase the overall cost and reduce system efficiency when used in applications such as renewable energy and electric drives. This work addresses the issues by proposing a reduced component count multi‐input MLI structure combined with two different level boosting stages. Using n repeating units and level boosting stages, the proposed MLI structure can produce 8 n + 15 levels at the output instead of 2 n + 1 levels only without level boosting stages. Furthermore, by proper selection of the magnitude of dc sources the proposed MLI can produce higher number of levels. Comparative analysis reveals that the proposed MLI is a cost‐effective alternative to the conventional MLI. In addition, it has fewer switch requirements, low standing voltage, and less power loss. Both the fundamental frequency modulation and carrier‐based high‐frequency pulse width modulation control schemes are applied to suitably control the proposed MLI structure. Extensive simulation of the proposed MLI is performed on MATLAB/Simulink environment under different dynamic conditions and validated experimentally on a prototype of the 39‐level MLI developed in the laboratory.