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A Switched Capacitor Based Seven Level Active Neutral Point Clamped (ANPC) Inverter Topology with Reduced Switching Devices

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Abstract

A novel seven-level boost active-neutral-point-clamped (7LB-ANPC) inverter topology is presented in this paper. The structure of the inverter topology comprises of the combination of a cross-connected switched capacitor and T type neutral point clamped inverter with eight switches, four diodes, and one floating capacitor. The analysis begins with the study of detailed modes of operation where the steady state and dynamic behaviour are presented under different loading conditions. To achieve a balanced floating capacitor voltage, a phase disposition multi-carrier modulation technique is used. By integrating a single floating capacitor, the voltage is balanced without any sensors and gain is increased by 1.5 times. The benefits of the proposed topology are less number of switching devices, low switching and conduction losses, also the floating capacitor voltage is self-balanced with good boosting ability, the measured THD values of voltage and current are 4.1% and 1.1% correspondingly and these values are less than the IEEE 519. Furthermore, to authorize the superiority of the proposed topology, its configurations are compared with existing inverter topologies. A prototype model is developed for validating the simulation results.

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  1. Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, 603203, India

    M. Sivasubramanian & C. S. Boopathi

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  1. M. Sivasubramanian
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  2. C. S. Boopathi
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Correspondence to M. Sivasubramanian.

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Sivasubramanian, M., Boopathi, C.S. A Switched Capacitor Based Seven Level Active Neutral Point Clamped (ANPC) Inverter Topology with Reduced Switching Devices. J. Electr. Eng. Technol. 16, 3103–3112 (2021). https://doi.org/10.1007/s42835-021-00844-z

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  • DOI: https://doi.org/10.1007/s42835-021-00844-z

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