결정질 PV 모듈의 string 구성에 따른 바이패스 다이오드 동작 분석

Previous studies have been focused on the voltage of bypass diode and Isc(Short Circuit Current) of the influenced solar cell. The bypass diode starts working when it gets the reversed applied voltage. Previous studies have only concentrated on Isc of the influenced solar cell and Imp of PV module to explain the bypassing performance. However, usually the PV module and inverter are installed together. The inverter has the MPPT(Maximum Power Point Tracking) function for best performance. We can expect the bypassing point is regulated by MPPT function of inverter. In this paper we show the simulation results for bypass diode in PV module. We also analyzed the relationship of the bypassing point and the composition of PV module. As the result, the more cells were connected with each string, the earlier bypassing performance happens with the fixed number of strings. As diode groups increase, the bypassing performance is also faster. This effect is greater, compared to cell number change.