Abstract:
It is a well-documented fact that partial shading of a photovoltaic array reduces it
output power capability. However, the relative amount of such degradation in energy
production cannot be determined in a straight forward manner, as it is often not
proportional to the shaded area. This paper clarifies the mechanism of partial PV
shading on a number of PV cells connected in different configuration. The analysis is
presented in simple terms and can be useful to someone who wishes to configure PV
array in any areas where shades effect on PV power. First we collect some small PV
cell and measure their power. Then made arrangements with all required components
including halogen lights, data logger, aluminum frames etc. We chose five PV array
configuration. Those are SP, TCT, BL, HC, HC-TCT. And we choose four shading
patterns and named them as shading pattern 1, shading pattern 2, shading pattern 3 and
shading pattern 4. We applied all those shading patterns on all five configurations.
Then measured power of those configurations. We got best power without shading at
BL, for shading pattern 1 HC provided best power. For shading pattern 2 HC-TCT is
best. And for shading pattern 1 & 2 BL provides best power.
