RT journal article
T1 Control of PV power plants with quasi-Z-source cascaded H-bridge multilevel inverters under failure
A1 Carrasco González, David
A1 Horrillo Quintero, Pablo
A1 García-Triviño, Pablo
A1 Sarrias Mena, Raúl
A1 García Vázquez, Carlos Andrés
A1 Fernández Ramírez, Luis Miguel
A2 Ingeniería Eléctrica
A2 Ingeniería en AutomáticaElectrónica, Arquitectura y Redes de Computadores
K1 Control system
K1 Photovoltaic power plants
K1 Quasi-Z-source cascaded H-bridge multi-level inverter
AB At the present time, quasi-Z-source cascaded H-bridge multilevel inverters (qZS-CHBMLI) have gained attention in photovoltaic (PV) applications, due to their advantages over traditional multilevel inverters. They allow single-stage power conversion of a PV power plant by independently adjusting the DC voltage in each module; thus, each PV array operates at the maximum power. This advantage permits dispensing with a DC/DC boost converter and reduces the number of modules required. This paper develops a novel control strategy for a qZS-CHBMLI connected to a single-phase system that guarantees proper operation when a fault occurs in a quasi-impedance source inverter (qZSI). The control strategy is employed in a grid-connected qZS-CHBMLI with three modules, each one with a quasi-impedance network, a 4.8 kW PV array and a voltage source inverter (VSI), with H-bridge topology. The purpose of the control system is to deliver a suitable DC voltage at the input of the VSI and ensure the grid power requirements after a fault in a module. The proposed control system is evaluated through a 40 s simulation in MATLAB/Simulink® in two cases: A) analysis of the system behaviour when there is a variation in the operation limit equation; and B) evaluation of the control strategy under dissimilar operating conditions. In addition, an experimental setup based on an OPAL RT-4510 unit and a dSPACE MicroLabBox prototyping unit is employed to validate the results. The results confirmed the correct response of the applied strategy with the failure of a single module.
PB Elsevier
SN 0142-0615
YR 2024
FD 2024
LK http://hdl.handle.net/10498/32783
UL http://hdl.handle.net/10498/32783
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-may-2026