Active and Reactive Power Sharing for PV Power Plants with Quasi-Z-source Cascaded H-bridge Multilevel Inverters

Quasi-Z-source cascaded H-bridge multilevel inverters (qZS-CHBMLIs) have gained interest in photovoltaic (PV) applications, where each module allows single-stage power conversion of a PV power plant controlling the DC voltage independently to operate each PV generator at maximum or limited power, an...

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Published in2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES) pp. 1956 - 1961
Main Authors Horrillo-Quintero, Pablo, Garcia-Trivino, Pablo, Sarrias-Mena, Raul, Garcia-Vazquez, Carlos Andres, Fernandez-Ramirez, Luis M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 09.12.2022
Subjects
control system
Control systems
Multilevel inverters
power sharing
Power supplies
PV power plant
quasi-Z-source cascaded H-bridge multi-level inverter
Radiation effects
Reactive power
Renewable energy sources
Simulation
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Summary:Quasi-Z-source cascaded H-bridge multilevel inverters (qZS-CHBMLIs) have gained interest in photovoltaic (PV) applications, where each module allows single-stage power conversion of a PV power plant controlling the DC voltage independently to operate each PV generator at maximum or limited power, and thus reducing the number of modules needed. This paper presents a control system to share the active and reactive power in PV plants with qZS-CHBMLIs operating with different conditions and limited power delivered to the grid. It is applied to a grid-connected qZS-CHBMLI with three cascaded qZSI, each one connected to a 4.8 kW PV power plant. The control system is evaluated under different operating conditions in each PV power plant, and delivering to the grid the available power or limiting it according to the active and reactive power setpoint defined by the system operator. The results show the adequate response of the proposed configuration and the control system.
DOI:10.1109/SPIES55999.2022.10082590