In this paper, a comparative study of the maximum power on the
shading rate on the maximum power of thin film PV modules. Thus two thin film
PV modules of type Copper indium gallium selenide, CIGS, of 90W power and a CdTe(Cadmium telluride)/CdS (Cadmium
sulfide) module, of maximum power 75W. These modules, reference SN-CIGS90 and CX3 75 were tested under the
conditions of the installation site to ensure their proper functioning and to determine the initial values of electrical
parameters before shading. The results obtained are as follows: for the
CIGS: Pm (80.717W); Vco (23.06V), Icc (3.5A) and for the CdTe:Pm (54.914W); Vco (35.52V), Icc (1.546A). After this characterization test, the modules are
exposed to real operating conditions at the Center for Study and Research on
the renewable energy (CERER), Cheikh Anta Diop University in Dakar. Four types
of shading are performed on each module with the same mask: partial shading at
25%, 50%, 75% and complete shading at 100%. The comparison of the variation
rates obtained on the experimental values of the 4 types of shading carried out
on each module, shows that, the phenomenon of shading constitutes an
environmental factor which influences negatively the maximum power of the thin
film PV modules. But this reduction depends on the surface of the shaded
module, the nature of the mask but also
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