Soft switched multilevel unidirectional high frequency link DC/AC converter for medium voltage grid integration

Mahapatra, M and Pal, A and Basu, K (2018) Soft switched multilevel unidirectional high frequency link DC/AC converter for medium voltage grid integration. In: 1st IEEE International Conference on Industrial Electronics for Sustainable Energy Systems, IESES 2018, 30 - 2 February 2018, Hamilton, pp. 162-167.

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Abstract

This paper describes a cascaded multilevel converter topology for direct medium voltage grid integration of photovoltaic sources. The topology uses high frequency magnetic isolation and hence, reducing volume and cost of overall system. The topology is single stage and does not have any inter-stage bulky filter capacitor, thus improving reliability. The low voltage DC side converter active switches are high frequency switched. These active switches are zero voltage switched (ZVS) for most part of the line cycle. The soft-switching is achieved without additional snubber elements. The active switches interfacing the medium voltage grid are switched at line frequency incurring negligible switching loss. The converter has modular structure which also has added advantages of easy repair-replacement. Modulation strategy and soft-switching technique are analyzed in detail. Key simulation results are presented to verify the circuit operation.

Item Type:	Conference Paper
Publication:	Proceedings - 2018 IEEE International Conference on Industrial Electronics for Sustainable Energy Systems, IESES 2018
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Electric inverters; Energy conservation; Industrial electronics; Topology, Cascaded multilevel converter; High frequency link; Medium voltage grid; Modular structures; Modulation strategy; Photovoltaic sources; Soft-switching technique; Zero-voltage-switched, Zero voltage switching
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	08 Aug 2022 06:36
Last Modified:	08 Aug 2022 06:36
URI:	https://eprints.iisc.ac.in/id/eprint/75575

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