| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of simply and efficiently performing abnormality diagnosis on a photovoltaic power generation system without providing a special measurement device.SOLUTION: An abnormality diagnosis method for photovoltaic power generation system includes: a step of measuring open circuit voltage Voc, short circuit current Isc, and maximum output power Pmax from actual generated power, where maximum output operation current providing the maximum output power Pmax is referred to as Imp, in units of facilities on which abnormality diagnosis is performed; a step of calculating, by using calculation using an equation led from an equivalent circuit, an I-V curve Ci on which open circuit voltage Voc'and short circuit current Isc' are equal to the open circuit voltage Voc and short circuit current Isc, respectively, where maximum output power on the I-V curve Ci is referred to as Pmax' and maximum output operation current providing the maximum output power Pmax' is referred to as Imp'; and a step of performing abnormality diagnosis in units of target facilities by comparing the maximum output power Pmax or/and the maximum output operation current Imp with the maximum output power Pmax' or/and the maximum output operation current Imp'.SELECTED DRAWING: Figure 1 |
