Title:
METHOD AND DEVICE FOR DIAGNOSING REMAINING SERVICE LIFE OF WIND POWER GENERATOR
Document Type and Number:
WIPO Patent Application WO/2022/270025
Kind Code:
A1
Abstract:
The present invention provides a method for diagnosing the remaining service life of a wind power generator (1) using a remaining service life diagnostic device (20), wherein: the remaining service life diagnostic device (20) has a fatigue model creation unit (21), a design fatigue calculation unit (22), an actual fatigue calculation unit (23), and a remaining service life evaluation unit (24); the fatigue model creation unit (21) models the fatigue characteristics of the wind power generator 1 (e.g., a fatigue equivalent load acting on the wind power generator); the design fatigue calculation unit (22) calculates design fatigue from fatigue characteristics and design wind conditions; the actual fatigue calculation unit (23) calculates actual fatigue from the fatigue characteristics and the actual wind conditions at the site where the wind turbine generator is constructed; and the remaining service life evaluation unit (24) calculates the remaining service life using the design fatigue and the actual fatigue. For example, the remaining service life is diagnosed with high accuracy by modeling the fatigue equivalent load acting on the wind power generator from readily available information, and quantifying and comparing accumulation of fatigue under design and actual wind conditions from the obtained fatigue equivalent load and wind speed frequency distribution and turbulence intensity under the design and actual wind conditions.
Inventors:
NAMURA NOBUO (JP)
Application Number:
PCT/JP2022/009676
Publication Date:
December 29, 2022
Filing Date:
March 07, 2022
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
F03D17/00
Foreign References:
| JP2018091328A | 2018-06-14 | |||
| JP2018185171A | 2018-11-22 | |||
| JP2016188612A | 2016-11-04 | |||
| JP2010048239A | 2010-03-04 | |||
| JP2015117682A | 2015-06-25 | |||
| CN109340062A | 2019-02-15 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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