A Flyback-Assisted Single-Sourced Photovoltaic Power Conditioning System Using an Asymmetric Cascaded Multilevel Inverter
| Autor: | Ashraf Ahmed, Joung-Hu Park, Mohana Sundar Manoharan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
Flyback converter business.industry 020208 electrical & electronic engineering Flyback transformer Photovoltaic system 020302 automobile design & engineering 02 engineering and technology Maximum power point tracking Power (physics) Reduction (complexity) 0203 mechanical engineering Control and Systems Engineering 0202 electrical engineering electronic engineering information engineering Electronic engineering Transient (oscillation) Electrical and Electronic Engineering business Voltage |
| Zdroj: | Journal of Power Electronics. 16:2272-2283 |
| ISSN: | 1598-2092 |
| DOI: | 10.6113/jpe.2016.16.6.2272 |
| Popis: | This paper proposes a power conditioning system (PCS) for distributed photovoltaic (PV) applications using an asymmetric cascaded multilevel inverter with a single PV source. One of the main disadvantages of the cascaded multilevel inverters in PV systems is the requirement of multiple isolated DC sources. Using multiple PV strings leads to a compromise in either the voltage balance of individual H-bridge cells or the maximum power point tracking (MPPT) operation due to localized variations in atmospheric conditions. The proposed PCS uses a single PV source with a flyback DC-DC converter to facilitate a reduction of the required DC sources and to maintain the voltage balance during MPPT operation. The flyback converter is used to provide input for low-voltage H-bridge cells which processes only 20% of the total power. This helps to minimize the losses occurring in the proposed PCS. Furthermore, transient analyses and controller design for the proposed PCS in both the stand-alone mode and the grid-connection mode are presented. The feasibility of the proposed PCS and its control scheme have been tested using a 1㎾ hardware prototype and the obtained results are presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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