Temperature effect of photovoltaic module under partial shading operation condition

This paper focused on hot spot and module operating temperature variation due to partial shading has a vital effect in degrading the performance of practical PV module operation. So it is essential to take proper action in minimizing this effect otherwise the whole power production can be halted in a PV power generation plant. It is shown that partial shading influences most of the perilous hot spot in PV module which is liable for total power dissipation. Here cracks have been discussed due to hot spot and other causes in detail. Cracks presenting in the solar module can degrade up to 10% of total power generation of a solar module. From analysis it is shown that solar modules containing hot spot are not homogeneous in elemental concentration. Reverse current due to partial shading can increase module temperature up to 130°C. The application of bypass diode model in PV device has been described to overcome the power degradation due to hot spot and temperature effect under partial shading condition.