CONCENTRATOR PV MODULES WITH Ⅲ-Ⅴ MULTIJUNCTION SOLAR CELLS FOR DIFFERENT GEOGRAPHIC LOCATIONS: OUTPUT ENERGY PREDICTIONS

摘要

In the work, power generation by concentrator photovoltaic modules based on Ⅲ-Ⅴ multijunction solar cells in different geographic regions has been investigated. Simulation of the dependence of Ⅲ-Ⅴ PV cell operating parameters on variation of the sunlight spectral composition in different climatic conditions has been performed. PV converter production in several geographic locations has been estimated. On the basis of the rated power production values, evaluation of the annual power generation prediction accuracy has been carried out with accounting for the effects of the PV converter variation in changing the radiation spectral composition and also in neglecting these effects. It has been established that the error of prediction being performed by the "simplified" scheme depends substantially on the number of photoactive p-n junctions in a solar cell and can reach 10-16 % for PV modules based on triple-junction GaInP/Ga(In)As/Ge solar cells, 18 % and 21 % for modules based on 4- and 6-junction cells, correspondingly. Evaluation of productivity of PV modules based on optimized for a specified geographic region triple-junction GaInP/GaAs/Ge solar cells has been performed. It has been shown that the error in predicting the power production of the modules with optimized solar cells is lower and their annual generation is higher by 2-4 %.