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Design and Experimental Investigation of Zeta Converter Fed Reduced Switch Multi-stage Grid Connected Boost MLI

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Abstract

Single-phase grid-tied inverter is a promising structure for low wattage sustainable Energy systems due to its compact size, flexible operation and lower cost. The traditional system employs a boost converter and a full bridge inverter to pump the energy from sustainable sources to the utility grid. The traditional boost converter has bounded operation in increasing or decreasing the dc voltage from sources like PV modules. The full bridge three-level PWM inverter, on the other hand, increases switching losses, devices with high voltage/current capacity, and electromagnetic interference.This work tries to address the faults highlighted earlier by introducing a modified reduced switch count Multi-stage Boost Inverter. This setup has two stages, a zeta converter used for limitless operation across the working range and a reduced count multilevel inverter. This setup has ability to boost the input DC voltage with voltage self-balancing and convert to AC voltage. This setup has a current control technique is used to synchronize the inverter output sinusoidal and in-phase with the grid parameters. This technique is also used to control the duty cycle to maintain the required output voltage at converter side. Usefulness of the presented work is analyzed in MATLAB/Simulink and an experimental prototype is constructed to verify the simulated response.

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Authors and Affiliations

  1. Department of EEE, SRM Institute of Science and Technology, Kattankulathur, Tamilnadu, 603203, India

    M. Rajkumar & A. Rathinam

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  1. M. Rajkumar
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Rajkumar, M., Rathinam, A. Design and Experimental Investigation of Zeta Converter Fed Reduced Switch Multi-stage Grid Connected Boost MLI. J. Electr. Eng. Technol. 19, 361–371 (2024). https://doi.org/10.1007/s42835-023-01517-9

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