| 摘要 |
Provided is a technology that enables sensing of a solar battery string failure even with a smaller change in output, and that enables identification of a factor causing the failure. A monitor device 7i in a solar power generation system performs: (i) a process of extracting a first time band indicating a minimum amount of solar radiation and a second time band indicating a maximum amount of solar radiation in a day; (ii) a process of calculating, using a ratio of operation current and short-circuit current in a solar battery array, an expected electric power value of a solar battery string to be inspected in each of the first and second time bands; (iii) a process of calculating, from measurement electric power values of the solar battery string to be inspected in the first and second time bands, the expected electric power value of the first time band, and the expected electric power value of the second time band, first and second electric power losses in the first and second time bands; and (iv) a process of detecting a failure in the solar battery string to be inspected based on the first and second electric power losses. |
