不同聚光倍数下太阳电池的特性及仿真

Characteristics and simulation of solar cells under different concentration ratios

聚光太阳系统的转换效率较高主要原因为该系统是将聚光器与多结太阳电池进行组合所得。主要以单个二极管模型的等效电路为依据,通过建立三结聚光叠层太阳电池的数学模型,对不同聚光倍数下(200~1 000X)太阳电池的电学特性进行研究,并将实测值与理论值进行比较。结果表明,当聚光比增大时其短路电流、开路电压和电池功率均会增加,而电池效率则出现先升高后下降的趋势。经比较得到,理论值均大于所得实测值,且当聚光比增大时计算误差也会随之增大,但计算误差的最大值均小于7.5%。

The high conversion efficiency of the concentrator solar cells is due to the combination of multi-junction solar cells with the condenser. On the basis of the equivalent circuit of a single diode model, a three-junction concentrator laminated solar battery model was built. The electrochemical performance of concentrator solar system was studied under different concentration ratios（200-1 000X）, and the measured values were compared with the theoretical values. The results show that when the concentrated ratio increases, the short circuit current and open circuit voltage and battery power may also increase;while the battery efficiency may first increase and then decrease. After comparison, the measured values obtained are greater than the theoretical value; the calculation error increases with the increase of concentrating ratio, but the maximum value of calculation error is less than 7.5%.