IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0478233
(2009-06-04)
|
등록번호 |
US-8154141
(2012-04-10)
|
우선권정보 |
ES-200801740 (2008-06-09) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Gamesa Innovation & Technology, S.L.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
2 |
초록
▼
The wind power installation comprises a rotor with at least one rotor blade, a generator, and a pitch control system for controlling the pitch of the rotor blades, said pitch control system comprising at least one AC motor (100) arranged to be fed by a converter (101). The pitch control system furth
The wind power installation comprises a rotor with at least one rotor blade, a generator, and a pitch control system for controlling the pitch of the rotor blades, said pitch control system comprising at least one AC motor (100) arranged to be fed by a converter (101). The pitch control system further comprises means (102) for bypassing said converter (101) so as to connect the AC motor (100) to receive power from an emergency AC power supply source.
대표청구항
▼
1. Wind power installation comprising: a rotor comprising at least one rotor blade (12) connected to a hub (11);a generator (13), said generator being arranged to be driven by the rotor so as to produce electric power, said generator being connectable to a grid (4) for distributing electric power ge
1. Wind power installation comprising: a rotor comprising at least one rotor blade (12) connected to a hub (11);a generator (13), said generator being arranged to be driven by the rotor so as to produce electric power, said generator being connectable to a grid (4) for distributing electric power generated by the generator;a pitch control system for controlling the pitch of the rotor blades, said pitch control system comprising, for each rotor blade (12), a pitch drive (A, B, C) comprising at least one AC motor (100) arranged to interact with the corresponding rotor blade (12) for producing movement of said rotor blade around a longitudinal axis of said rotor blade;wherein each one of said at least one AC motor (100) is arranged to be fed by a converter (101) of the pitch control system;characterised in thatthe pitch control system further comprises means (102) for bypassing said converter (101) so as to connect the corresponding AC motor (100) to receive power from an emergency AC power supply source. 2. Wind power installation according to claim 1, wherein said emergency AC power supply source is the grid (4), whereby the AC motor will be fed with current having the grid frequency. 3. Wind power installation according to claim 1, wherein said emergency AC power supply source is an output end of the generator (13), whereby the AC motor will be fed with current having the generator frequency. 4. Wind power installation according to claim 1, wherein said emergency AC power supply source is a Uninterrupted Power System (5). 5. Wind power installation according to claim 1, in which said means for bypassing the converter are arranged to connect the AC motor (100) to be substantially directly fed from a nacelle-hub power transfer system (103) arranged to supply power to components inside the hub (11). 6. Wind power installation according to claim 1, wherein said emergency AC power supply source comprises an additional generator (6) arranged in the hub (11) for producing AC power inside the hub. 7. Wind power installation according to claim 6, wherein said means for bypassing the converter are arranged to connect the AC motor (100) to be substantially directly fed from said additional generator (6). 8. Wind power installation according to claim 1, wherein said rotor comprises a plurality of said rotor blades (12), and wherein said at least one AC motor (100) comprises at least one separate AC motor for each one of said rotor blades. 9. Method of modifying the blade pitch of at least one rotor blade in a wind power installation, said wind power installation comprising: a rotor comprising at least one rotor blade (12) connected to a hub (11);a generator (13), said generator being arranged to be driven by the rotor so as to produce electric power, said generator being connectable to a grid (4) for distributing electric power generated by the generator;a pitch control system for controlling the pitch of the rotor blades, said pitch control system comprising, for each rotor blade (12), a pitch drive (A, B, C) comprising at least one AC motor (100) arranged to interact with the corresponding rotor blade (12) for producing movement of said rotor blade around a longitudinal axis of said rotor blade;wherein each one of said at least one AC motor (100) is arranged to be fed by a converter (101) of the pitch control system;characterised in thatthe method comprises the steps of, in the case of at least one pre-determined condition,bypassing at least one converter (101) so as to connect at least one AC motor (100) to receive power from an emergency AC power supply source; andmodifying the blade pitch of at least one rotor blade (12) using said at least one AC motor (100) powered from said emergency AC power supply source. 10. Method according to claim 9, wherein said emergency AC power supply source is the grid (4), whereby the AC motor will be fed with current having the grid frequency. 11. Method according to claim 9, wherein said emergency AC power supply source is an output end of the generator (13), whereby the AC motor will be fed with current having the generator frequency. 12. Method according to claim 9, wherein said emergency AC power supply source is a Uninterrupted Power System (5). 13. Method according to claim 9, wherein the step of bypassing the converter comprises connecting the AC motor (100) to be substantially directly fed from a nacelle-hub power transfer system (103) arranged to supply power to components inside the hub (11). 14. Method according to claim 9, wherein said emergency AC power supply source comprises an additional generator (6) arranged in the hub (11) for producing AC power inside the hub. 15. Method according to claim 14, wherein said step of bypassing the converter comprises connecting the AC motor (100) to be substantially directly fed from said additional generator (6).
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