abstract

• In this paper, a control system is developed to address the power imbalance in a large-scale grid-tied photovoltaic (PV) cascaded multilevel inverter. The proposed approach helps handling the unequal irradiance distribution among independent PV arrays located as input sources at each one of the stages of the multilevel converter, balancing all dc link voltages and improving the transient response of the buses. Depending on the power transferred to the grid, the individual control signals for each H-bridge cell are adjusted through a direct relation between the output of the individual dc link voltage controllers and the corresponding general voltage controller. Simulation tests are developed to evaluate the performance and transient response of the balancing method under sudden unbalanced irradiance variations. © 2021 IEEE.

authors

• Cárdenas Galindo Víctor Manuel
• González M.
• Leon-Ruiz Y.
• Álvarez Salas Ricardo

publication date

• 2021-01-01

published in

• 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings  Proceedings

keywords

• bus voltage balancing control; Cascaded H-bridge multilevel converter; grid-connected.; photovoltaic system Bridge circuits; Controllers; Electric power system control; Electric power transmission networks; Power converters; Solar cells; Voltage control; Balancing controls; Bus voltage; Bus voltage balancing control; Cascaded H-bridge multilevel converters; DC-link voltages; Grid-connected; Grid-connected.; Photovoltaic systems; Voltage balancing; Voltage controllers; Transient analysis

Digital Object Identifier (DOI)

• 10.1109/ECCE47101.2021.9595067

PubMed ID

start page

• 601

end page

• 607

volume

issue