The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2024
Filed:
Jun. 03, 2019
Mitsubishi Electric Corporation, Tokyo, JP;
Takayuki Morioka, Tokyo, JP;
Hidetada Tokioka, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A deterioration diagnosis device for a solar cell string and a photovoltaic power generation system includes an impedance measuring instrument to measure a frequency characteristic of a first impedance between solar power generation units connected in the solar cell string and to measure a frequency characteristic of a second impedance, an analysis unit to calculate a first increment from an initial value of a series resistance component, and to calculate a second increment from an initial value of a resistance component between the first end of the plurality of solar power generation units connected in series and the frames in the solar cell string based on the frequency characteristic of the second impedance, and a deterioration determining unit to determine a position of a solar cell module having an increased resistance in the solar cell string based on the first increment and the second increment calculated by the analysis unit.