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US 8,517,681 B2Granted
Wind turbine blade and wind turbine generator having the same
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTakehiro Naka, Takatoshi Matsushita, Nobuyasu Nakamura, Yoshihiko Hayashi, Shinji Arinaga
Life of this patent
Estimating the term…
Abstract
A wind turbine blade has a blade body 11, a plurality of receptors 12, 13 embedded in and exposed to the surface of the blade body 11, a conductor layer 14 provided on the surface of the blade body 11 and connecting the receptors 12, 13 with one another and a downconductor 21 connected to the receptors 12, 13 and provided in the blade body 11. The downconductor 21 may be embedded in an insulator.
Claims18
A wind turbine blade, comprising:
- a blade body;
- a plurality of receptors which is embedded in the blade body and exposed on a surface of the blade body;
- a conductor layer which is provided on the surface of the blade body and connects the plurality of receptors to one another, the conductor layer being arranged on an upwind side surface and a downwind side surface the blade body in a continuous manner from the upwind side surface to the downwind side surface through a leading edge of the blade body;
- and
- a downconductor which is connected to the plurality of receptors and provided in the blade body.
2 more elements
An operation method of a wind turbine generator which comprises
- a nacelle mounted rotatably on a support,
- a rotor head which is connected rotatably to the nacelle,
- first, second and third wind turbine blades each of which is provided on the rotor head and capable of feathering, the first wind turbine blade having a tip part which is additionally processed for lightning protection, the second wind turbine blade having an upwind part which is additionally processed for lightning protection, and the third wind turbine blade having a downwind part which is additionally processed for lightning protection, the method comprising the steps of:
- feathering the first to third wind turbine blades in response to approaching of lightning;
- and
- stopping rotation of the rotor head in such a stop position that the first wind turbine blade having the tip part that is additionally processed for lightning protection compared to other parts of the first wind turbine blade is oriented along a vertical direction with the tip part facing upward,
- wherein in the stopping step, the second wind turbine blade having the u win that is additionally processed for lightning protection compared to other parts of the second wind turbine blade is oriented so that the upwind part faces upward, and the third wind turbine blade having the downwind part that is additionally processed for lightning protection compared to other parts of the third wind turbine blade is oriented so that the downwind part faces upward.
4 more elements
Dependencies are inferred from the claim text.