Title:
WIND POWER GENERATOR
Document Type and Number:
WIPO Patent Application WO/2018/020628
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a highly reliable wind power generator. The wind power generator according to the present invention is characterized by being provided with a rotor 5 which rotates when subjected to wind, a nacelle 2 which rotatably supports the rotor 5, a tower 1 which rotatably supports the nacelle 2, and a yaw actuator 8 which generates a drive force for rotating the nacelle 2 around the tower 1, wherein: the wind power generator has both a first mode which the wind power generator assumes when the wind speed is equal to or higher than a predetermined wind speed, and in which the rotor 5 is positioned on the lee side of the nacelle 2, and a second mode in which power is generated using the rotational energy generated by the rotor 5; in the first mode, when the angle difference between the azimuth angle of the nacelle 2 and the wind direction angle is equal to or greater than a first predetermined value, yaw rotation is caused using the output of the yaw actuator 8 so as to reduce the angle difference, whereas when the angle difference is equal to or less than a second predetermined value, the yaw actuator 8 is stopped from applying a drive force; and when the angle difference is equal to or less than the second predetermined value, the braking force between the nacelle 2 and the tower 1 is set to be lower than when the wind power generator is in the second mode.
Inventors:
SHIGENAGA YASUSHI (JP)
KIYOKI SOUICHIRO (JP)
KIYOKI SOUICHIRO (JP)
Application Number:
PCT/JP2016/072105
Publication Date:
February 01, 2018
Filing Date:
July 28, 2016
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
F03D7/04
Foreign References:
| JP2008095664A | 2008-04-24 | |||
| JP2007146858A | 2007-06-14 | |||
| JP2005320891A | 2005-11-17 | |||
| US20100209246A1 | 2010-08-19 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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