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Critical analysis on cascaded T-type multilevel inverter topology to grid-integrated photovoltaic systems for symmetrical voltage ratios

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Abstract

Among the various reduced switch multilevel inverter (MLI) topologies, T type topology has got appreciable reduction in switch count. However, features of T-type such as absence of switching redundancies, inability to support the asymmetry, high device ratings, and inability to support equal utilization of dc-link has limited its implementation for grid-integrated photovoltaic (PV) system applications. To overcome this, cascaded T-type topologies emerged as the prime solution. The work presented in this paper describes the implementation of cascaded T-type MLI topology including its symmetrical and asymmetrical configurations with a simplified carrier based PWM scheme. A critical analysis on the cascaded T-type MLI is also presented by considering the switch count. From the results, we conclude that the cascaded T-type MLI topology obtains satisfactory phase voltage along with the improved harmonic profile compared with the other MLI topologies.

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  1. Department of Electrical and Electronics Engineering, Sathyabama Institute of Science Technology, Chennai, India

    Chandramouli Adupa & V. Sivachidambaranathan

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  1. Chandramouli Adupa
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  2. V. Sivachidambaranathan
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Correspondence to Chandramouli Adupa.

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Adupa, C., Sivachidambaranathan, V. Critical analysis on cascaded T-type multilevel inverter topology to grid-integrated photovoltaic systems for symmetrical voltage ratios. Int J Syst Assur Eng Manag 13, 1474–1484 (2022). https://doi.org/10.1007/s13198-021-01491-3

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  • DOI: https://doi.org/10.1007/s13198-021-01491-3

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