Development and implementation of an electronic prototype for solar panel characterization on exterior conditions
Keywords:
solar panels, V-I curve, electronic prototype, diode model, irradianceAbstract
An electronic prototype was developed and implemented with the aim to evaluate solar panel performance on outdoor condition. The prototype obtains the panel IV-curve by charging a capacitive circuit. Voltage and
current signal acquisition was achieved using a National Instruments card (NI-DAQ-USB6009), controlled by
Labview software. The diode model was used to fit acquired signals in order to reduce electrical noise. The
prototype results were validated with AMPROBE SOLAR600 analyzer using tree different panels in situ (two of 10W with similar characteristics and other of 55W). In uniform irradiance conditions, both devices showed similar performance on the IV curve, open circuit voltage and short circuit current measurements. However, the prototype presented shorter acquisition time and lower sensibility at transient irradiance variations caused
by clouds.
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