A Topology for Single-Phase PV Transformerless Multilevel Inverters

Single-phase non-isolated photovoltaic inverters are widely used to inject electrical power to the mains. In these systems, the leakage ground current is one of the most important issues to be solved. Several topologies have been proposed and studied during last decade contributing to reduce size, i...

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Bibliographic Details
Main Authors: Vazquez, G., Bustos, G., Hernandez-Aguilar, L. E., Sosa, J. M., Juarez-Balderas, M. A., Martinez-Rodriguez, P. R., Aztatzi-Pluma, D.
Format: Conference Proceeding
Language:English
Subjects:
Multilevel inverters
Photovoltaic systems
Pulse width modulation
Semiconductor diodes
Topology
Transformers
Voltage
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Summary:Single-phase non-isolated photovoltaic inverters are widely used to inject electrical power to the mains. In these systems, the leakage ground current is one of the most important issues to be solved. Several topologies have been proposed and studied during last decade contributing to reduce size, improving the efficiency and presenting solutions to the leakage ground current problem. In this paper, a five-level single-phase inverter topology is proposed. It consists in five power controlled semiconductors and five diodes. The converter operation is derived and a pulse width modulation strategy is particularly proposed. A study regarding efficiency and power losses distribution is also performed. The proposed single-phase transformerless multilevel inverter is validated by means of numerical simulations and the results and characteristics are compared with existing solutions.
ISSN:2573-0770
DOI:10.1109/ROPEC58757.2023.10409436