Original scientific paper
https://doi.org/10.1080/00051144.2022.2056809
A novel dual-leg DC-DC converter for wide range DC-AC conversion
K. Suresh
; Department of EEE, Sree Vidyanikethan Engineering College, Tirupati, Andhra Pradesh, India
E. Parimalasundar
; Department of EEE, Sree Vidyanikethan Engineering College, Tirupati, Andhra Pradesh, India
Abstract
This paper proposes DC–AC Dual-leg dual-stage Conversion (DDC) and DC–AC Direct single-stage conversions (DSC). Conventional energy conversion system has only two-stage conversion, so it has some drawbacks such as huge power loss, less conversion range and lower power rating. So direct conversion, dual-leg step-up and step-up conversions are the solutions to get wide voltage conversion efficiently. The proposed converter can perform the power conversion from battery DC supply into AC with 1:1 ratio, step-up AC, and step-down AC in both directions. Also, it can perform rectifier operation from grid AC supply into DC with 1:1 ratio, step-down DC, and step-up DC. Step-up, step-down and ideal operations are possible within a single circuit; its operation is similar to solid-state DC–AC/AC–DC transformer. The ideal operation, Step-down to Step-up conversion and Step-up to Step-down conversion are possible on both sides, so this converter can handle a wide range of voltage. Power distribution is achieved with voltage regulation between battery/DC-load and AC-load/grid using the proposed control strategy with proper modulation. A prototype model of a 2-kW power rating validates the advantages and feasibility of the proposed methodology.
Keywords
Boost inverter; boost rectifier; ideal inverter; ideal rectifier; buck inverter; buck rectifie
Hrčak ID:
287530
URI
Publication date:
11.4.2022.
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