Effect of the reverse bias characteristics of a PV cells on I-V characteristics of PV module with a cell lowered the generating power

摘要

The authors are studying the diagnostic method for a Photovoltaic system. Until now, it has been clarified that the shape of I-V curve of PV module with a cell lowered the generating power is different from the shape of I-V curve of normal PV module. In this paper, the I-V curve of PV cell in the reverse bias characteristics was investigated by utilizing the I-V curve of PV module with the cell lowered the generating power. The each I-V curve of the multicrystal PV cell and single crystal PV cell in the reverse bias characteristics were compared. And the shunt resistance of each PV cell was calculated from the I-V curve of PV module by the curve fitting method. As the results, it is clear that the I-V curve of multicrystal PV cell in reverse bias region has the variation, while the T-V curve of single crystal PV cell is almost similarity.