Two similar PV modules are subiected to the same irradiances and temperatures. T

Question

Two similar PV modules are subiected to the same irradiances and temperatures. The short-circuit current output of the first module is 2.3 A and the open-circuit voltage across the module terminal is V 18.35 V. The short-circuit current output of the second module is 2-2.3 A and the open circuit voltage across its terminals is V2 18.35 V. a) The two modules are connected in series, similar to Figure 2.33. Find the combined short-circuit current, I, and the combined open-circuit voltage, V. b) The two modules are connected in parallel, similar to Figure 2.38. Calculate the combined short-circuit current, I, and the combined open- circuit voltage, V.

Explanation / Answer

You have not posted the fig,therefore I am considering general series and parallel circuit.

(1) When two PV model are connect in series, there Short circuit current will remain 2.3 A because in series connection current remain same i.e in a single path only one value of current is possible in accordance with KCL,while open circuit Voltage will be 18.35+18.35=36.70V ,because voltage gets added up in series in accordance with KVL.

(2) when the PV model are connected in parallel their short circuit current will be added up to give resultabt SC current ie 2.3+2.3=4.6 agian in accordance with KCL while open circuit voltage will remain equal to 18.35 V because in Parall circuit voltage remain same in accordance with KVL.

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