Modeling and control of a three-phase isolated grid-connected converter fed by a photovoltaic array

This paper shows the modeling and control design of an isolated two-stage three-phase grid-connected converter for photovoltaic (PV) applications. The converter stages are modeled in order to obtain small-signal transfer functions that are used to design PI compensators. Three controllers are used i...

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Bibliographic Details
Main Authors: Villalva, M.G., Gazoli, J.R., Filho, E.R.
Format: Conference Proceeding
Language:English
Subjects:
Capacitors
control
Control design
DC-DC power converters
Feeds
full bridge converter
grid-connected
modeling
photovoltaic
Photovoltaic systems
Power system modeling
Solar power generation
Thermal resistance
Transfer functions
Voltage control
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Description
Summary:This paper shows the modeling and control design of an isolated two-stage three-phase grid-connected converter for photovoltaic (PV) applications. The converter stages are modeled in order to obtain small-signal transfer functions that are used to design PI compensators. Three controllers are used in the system: one for the output voltage of the PV array, one for the DC link capacitor and another for the sinusoidal three-phase output currents. Simulation results are presented and they show that the compensators are correctly designed and may be employed in practical systems.
ISSN:2165-0454
2643-9778
DOI:10.1109/COBEP.2009.5347682