Step-up Transformerless Seven-level DC-AC Hybrid Topology for Interconnection of Renewable-based DC Sources to Microgrids
| Autor: | Juan Ramón Rodríguez, Luis Eduardo Ugalde, Edgar L. Moreno-Goytia, N. M. Salgado-Herrera, Vicente Venegas Rebollar |
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| Rok vydání: | 2014 |
| Předmět: |
Forward converter
Engineering Buck converter Flyback converter business.industry Mechanical Engineering Buck–boost converter Ćuk converter Energy Engineering and Power Technology Topology (electrical circuits) Topology Boost converter Charge pump Electronic engineering Electrical and Electronic Engineering business |
| Zdroj: | Electric Power Components and Systems. 42:1792-1801 |
| ISSN: | 1532-5016 1532-5008 |
| Popis: | This article introduces a new step-up transformerless multi-level DC-AC hybrid topology for interconnecting renewable DC sources to loads or microgrids. This enabling technology incorporates the best characteristics of three modified basic topologies—a DC-DC multi-level boost converter, a DC-DC multi-level buck converter, and an H-bridge—to obtain a seven-level step-up DC-AC hybrid structure using only one DC input and nine power switches for a single-phase output with field-programmable gate array based control. The advantages of the step-up seven-level structure compared to other proposals are higher efficiency, a reduced number of power switches, and high power density associated with transformerless characteristic. Furthermore, in contrast to conventional topologies, the proposed design does not require voltage/current monitoring of the capacitors or a capacitor-balancing control scheme, and only one DC source input is used. Consequently, a high-performance configuration is obtained. The labor... |
| Databáze: | OpenAIRE |
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