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Modelling and control of a grid connected photovoltaic system

This paper presents a simulation model of the electric part of a grid connected
photovoltaic generator. The model contains a detailed representation of the main components of the
system that are the solar array, boost converter and the grid side inverter. A proper control of the
DC/DC converter is developed in order to extract the maximum amount of from the photovoltaic
generator. The grid interface inverter transfers the energy drawn from the PV module into the grid
by keeping common dc voltage constant. The PQ control approach has been presented for the
inverter. Modelling and control is carried out using the causal informational graph method. The
simulation results under Matlab/Simulink show the control performance and dynamic behaviour of
grid connected photovoltaic system.


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