METHOD FOR DETECTING FAILURE OF PHOTOVOLTAIC POWER SYSTEM

摘要

The present invention discloses a failure detecting method for a solar power generation system having plural solar cell strings in each of which plural solar cell modules are connected to each other in series. In this method, made is a measurement of the current value of each of the solar cell modules or the current value of each of the solar cell strings and the total current value of the whole of the solar power generation system; the measured current value of each of the solar cell modules or the measured current value of each of the solar cell strings is compared with an average current value per one solar cell module or an average current value per one solar cell string that are calculated out from the measured total current value of the whole of the solar power generation system; when the measured current value(s) of one or more of the solar cell modules or the measured current value (s) of one or more of the solar cell strings is/are (each) lower than the calculated average current value per one solar cell module or the calculated average current value per one solar cell string by a predetermined percentage or more, the solar cell module (s) or the solar cell string (s) in the low current value state is/are extracted as failure candidate(s); and then the extracted module(s) or string(s) is/are displayed or notified.