ACCURATE POWER MEASUREMENTS OF HIGH CAPACITANCE PV MODULES WITH SHORT PULSE SIMULATORS IN A SINGLE FLASH

摘要

A method for measuring accurately and rapidly the current-voltage characteristics of high-capacitancephotovoltaic devices using pulsed sunlight simulators is detailed. The data acquisition is performed in a single lightflash, whose duration can be as short as milliseconds. The innovation of the method is that it introduces the time as anindependent variable in the IV measurement. The method allows sufficient time for every individual IV data point torelax from capacitive effects, while employing efficient time management to the applied measurement load to achievefull Ⅳ tracking in a single flash of light. The resulting IV characteristics are the same as would be measured understeady-state illumination conditions and thus, provide an accurate estimation of the actual performance of the solarcell or module under artificial sunlight. The method, which is called Dynamic Ⅳ (t-Ⅳ), was validated in anexperiment, which examined three different types of commercially available high-capacitance PV modules. Theresults of the Dynamic Ⅳ were compared against steady-state Ⅳ measurements of each module showing agreementwith deviations largely overlapping within the limits of the measurement repeatability and not exceeding 0.2% onmaximum power output.