Why are the characteristic points of the PV curve in the PV Array block, particularly the open circuit voltage, shifted in the simulation?

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Vinay
Vinay 2024-11-18,6:56
The PV array block displays the I-V and P-V characteristics for specified irradiances and fixed temperature. The module here uses irradiances values of [1000 500 100] and temperature of 25 deg.C.
The 'open circuit voltage(Voc)' is a function of temperature and varies as
where β is the Temperature coefficient of Voc (%/deg.C) with default value of -0.36099
The issue is occuring because the value of the β is different from the default value causing the deviation from the optimum value of open circuit voltage. The default value shows the desired behavious of the 'Voc' as speciifed in the module.

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