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A cascaded multilevel inverter topology with only one bidirectional conducting switch


Mohamad, Ahmad Syukri and Mohd Radzi, Mohd Amran and Mailah, Nashiren Farzilah and Othman, Mohammad Lutfi (2017) A cascaded multilevel inverter topology with only one bidirectional conducting switch. In: 4th IEEE International Conference on Smart Instrumentation, Measurement and Applications (ICSIMA), 28-30 Nov. 2017, Putrajaya, Malaysia. .


The most common multilevel inverter topology types are neutral point clamped or diode clamped inverter, flying capacitor inverter and cascaded H-bridge inverter. Among the three, the cascaded H-bridge inverter is becoming the most popular type of multilevel inverter as the world is moving towards renewable energy. The cascaded H-bridge has modular structure, so it can be easily adapted in multiple dc sources system such as photovoltaic systems. The main disadvantage of cascaded H-bridge inverter is it requires a high number of switches, particularly for a high number of output voltage levels design. Another major disadvantage is a high number of switches need to be turned on during cascaded H-bridge operation, thus accumulating voltage drops across the conducting switches before it reach the output terminals, resulting losses and reduced efficiency, especially for a high power installation. In this paper, an uninterrupted neutral line multilevel inverter topology with only one conducting bidirectional switch at any time of operation is proposed. A 41-level version of the proposed topology is constructed and tested in Matlab Simulink platform. The result shows that for a high output voltage levels and high power load, the proposed inverter has a very low output THD level and a minimum internal losses.

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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1109/ICSIMA.2017.8311975
Publisher: IEEE
Keywords: Cascaded multilevel inverter; Conducting switch; High power inverter; Uninterruptible neutral line; Renewable energy; Low THDcomponent
Depositing User: Nabilah Mustapa
Date Deposited: 14 Aug 2018 02:38
Last Modified: 14 Aug 2018 02:38
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1109/ICSIMA.2017.8311975
URI: http://psasir.upm.edu.my/id/eprint/64719
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