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US 2018/0320664 A1Published application
Wind turbine variable-pitch control method and device
AssigneeBeijing Goldwind Science & Creation Windpower Equi Pment Co., Ltd.
InventorsJie ZHOU, Hao TANG, Qingtian WANG
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Abstract
A method and a device for use in variable-pitch control of a wind turbine, in said method: if a current wind speed is continuously maintained at a small wind speed, then periodically detecting whether a maintained duration of a current pitch angle of a wind turbine reaches a preset duration; once the preset duration is reached, switching a current minimum pitch angle to another minimum pitch angle.
Claims17
A pitch control method for a wind turbine, comprising:
- setting a plurality of minimum pitch angles;
- and
- switching periodically among the plurality of minimum pitch angles according to a first preset duration;
- wherein switching periodically among the plurality of minimum pitch angles according to the first preset duration comprises:
- determining whether a maintaining duration of a current minimum pitch angle reaches a preset duration, and switching the current minimum pitch angle to another minimum pitch angle of the plurality of the minimum pitch angles in a case that the maintaining duration reaches the preset duration.
2 more elements
A pitch control device for a wind turbine, comprising:
- a minimum pitch angle setting module, configured to set a plurality of minimum pitch angles;
- and
- a minimum pitch angle switching module, configured to switch periodically among the plurality of minimum pitch angles according to a first preset duration;
- wherein switching periodically among the plurality of minimum pitch angles according to the first preset duration comprises:
- determining whether a maintaining duration of a current minimum pitch angle reaches a preset duration, and switching the current minimum pitch angle to another minimum pitch angle of the plurality of the minimum pitch angles in a case that the maintaining duration reaches the preset duration.
2 more elements
Dependencies are inferred from the claim text.