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New Multicarrier Modulation Scheme for Harmonics Mitigation of T-Type Solar Multilevel Inverter

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Abstract

This paper presents a new low-frequency modulation scheme for the power quality improvement of a T-type multilevel inverter (T-MLI) based solar photovoltaic (SPV) system. The T-type converter is employed for DC-AC conversion, generating five voltage levels with six switches per phase. The new modulation scheme is generated with two different functions i.e., sine and pulse generator, to have a modified carrier wave. This unique modified shape reduces the total harmonics distortion (THD) of the five-level output voltage compared to well-known pulse width modulation (PWM) techniques. The new modulation is used for closed-loop switching of a three-phase multilevel converter with designated maximum power point trackers (MPPT). The unit template control is utilized in this paper to generate reference grid currents. This system feeds active power in variable solar irradiances with enhanced power quality. Simulated results show the effectiveness of the system, and real-time implementation validates its practicability.

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Acknowledgements

The authors are grateful to the Department of Science and technology, Govt. of India to facilitate research in Electrical Department at Indian Institute of Technology Delhi under grant RP03195 (FIST Scheme). The authors also acknowledge “SERB National Science Chair Fellowship” for providing research funds.

Funding

The authors are grateful to the Department of Science and Technology, Govt. of India for facilitating research in the Electrical Department at IIT, Delhi under grant RP03195 (FIST Scheme) and in part by OPAL-RT under grant RP03253. The authors also acknowledge the “SERB National Science Chair Fellowship” for providing research funds.

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Authors and Affiliations

  1. Department of Electrical Engineering, Bhagwan Parshuram Institute of Technology, Rohini, New Delhi, 110089, India

    Sanjay Upreti

  2. Department of Electrical Engineering, Indian Institute of Technology, New Delhi, 110016, India

    Shivam Kumar Yadav & Bhim Singh

  3. Department of Electrical Engineering, Delhi Technological University, New Delhi, 110042, India

    Narendra Kumar

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  1. Sanjay Upreti
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  2. Shivam Kumar Yadav
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Correspondence to Shivam Kumar Yadav.

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Upreti, S., Yadav, S.K., Singh, B. et al. New Multicarrier Modulation Scheme for Harmonics Mitigation of T-Type Solar Multilevel Inverter. J. Inst. Eng. India Ser. B 103, 903–911 (2022). https://doi.org/10.1007/s40031-021-00708-0

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  • DOI: https://doi.org/10.1007/s40031-021-00708-0

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