Determination of a new reliability indicator for the optimal sizing of an autonomous photovoltaic system with storage
The use of the standalone PV (SAPV) system must be efficient and
profitable for a better integration of solar energy in the global energy mix.
This article therefore proposes a model of the SAPV dimensioned in the
form of a matrix equation (AX = B), the resolution of which makes it
possible to estimate the size (peak power) and load factor of a standalone
PV system operating under certain weather conditions and supplying at
each moment (in terms of hours) the maximum load for which the system is
dimensioned. Depending on the setting of the values of the main elements
of the SAPV system, four scenarios are set. The first scenario considers
the sizes of all elements as dimensioned by an intuitive method. In the
second scenario, only the battery capacity is adjusted. In the third scenario,
only the capacity of the charge controller is adjusted. And finally, in the
fourth scenario, only the collection area of the PV modules is adjusted.
After simulation of the different scenarios in an integrated development
environment (SPYDER), significant results are obtained for the analysis of
the size of the system. The estimated peak power for scenarios I, II, III and
IV is respectively 2120W, 1866W, 1233:9W and 2141W. The load factor
is respectively 29:95%, 29:29%, 51:46% and 29:69%. We retain that, The
number of days of autonomy for scenario I is evaluated at 2.3 days which is
less than the number of days for which the storage system is dimensioned.