Asymmetric Cascaded DC Sources Multilevel Inverter with Less Active Switches and Simpler Control Strategy

Cascaded H-Bridge (CHB) multilevel inverter (MLI) is among the most preferred topology in solar PV systems. While traditional asymmetric CHB MLI is easy to achieve higher number of output voltage levels compared to traditional symmetric CHB MLI, charge balancing between the voltage sources remains a...

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Bibliographic Details
Published inApplied Mechanics and Materials Vol. 785; no. Recent Trends in Power Engineering; pp. 111 - 115
Main Authors Tan, Yee Chyan, Ong, Siok Lan, Syed Hassan, Syed Idris, Leong, Jenn Hwai
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.08.2015
Subjects
Asymmetry
Balancing
Charge
Direct current
Electric potential
Inverters
Multilevel
Voltage
Asymmetric
Multilevel Inverter
Half H-Bridge
Photovoltaic
Charge Balancing
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Summary:Cascaded H-Bridge (CHB) multilevel inverter (MLI) is among the most preferred topology in solar PV systems. While traditional asymmetric CHB MLI is easy to achieve higher number of output voltage levels compared to traditional symmetric CHB MLI, charge balancing between the voltage sources remains a challenge for asymmetric CHB MLI. This drawback results in unsteady DC voltage levels due to unbalanced power drawn from each voltage sources. Besides that, in battery powered applications, unbalanced power drawn results in unequal discharged among the batteries. In this paper, an asymmetric half H-bridge (HHB) MLI topology is presented which is easy to modularize as for symmetric CHB MLI while maintaining the ease in charge balancing control. The performance of this proposed asymmetric HHB MLI with charge balance control has been evaluated using PSIM software.
Bibliography:Selected, peer reviewed papers from the 2015 9th International Power Engineering and Optimization Conference (PEOCO 2015), March 18-19, 2015, Melaka, Malaysia
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ISBN:9783038355120
3038355127
ISSN:1660-9336
1662-7482
1662-7482
DOI:10.4028/www.scientific.net/AMM.785.111