Method and device for speed control of wind power generating set
A technology for wind power generators and rotational speed control, which is applied in the control of wind turbines, wind turbines, wind power generation, etc., and can solve the problems of limited application range of control methods and high probability of overspeed faults
Active Publication Date: 2019-07-23
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Problems solved by technology
[0004] The embodiment of the present invention provides a speed control method and device for a wind power generating set, which solves the technical problems that the control method of a wind generating set in the prior art has a limited scope of application and a high probability of overspeed faults
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[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0039] It should be understood that the term "and / or" used herein is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and / or B, which may mean that A exists alone, and A and B exist simultaneously. B, there are three situations of B alone. In addition, the chara...
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The invention provides a rotational speed control method and device for a wind power generating set. The method includes: judging whether the current wind condition is a gust of wind; if the current wind condition is a gust and the current instantaneous rotational speed of the wind power generating set is greater than or equal to a preset crossing If the speed is lower than the cut-out speed, the wind turbine is controlled to enter the active speed reduction mode; wherein, the active speed reduction mode includes reducing the standard speed setting value of the wind turbine to the desired speed setting within the first preset time period. value to increase the pitch rate of the wind turbine, thereby reducing the instantaneous speed of the wind turbine; after the first preset time period, exit the active speed reduction mode and resume normal operation. In gust conditions and the current instantaneous speed meets the active speed reduction mode, the pitch rate is increased by actively reducing the speed setting value of the wind turbine to achieve the purpose of actively reducing the speed of the wind turbine, which can reduce overspeed in a wider range. probability of failure.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of wind power generation, in particular to a method and device for controlling the speed of a wind power generating set. Background technique [0002] In recent years, wind power generation has been widely used due to its environmental protection advantages. Wind turbines need to control their operating status according to different environments. As a key component of the wind turbine, the generator needs to control the speed to prevent the bad working conditions of the speed out of control. [0003] When the rotating speed of the wind generating set reaches or exceeds the cut-out rotating speed of the wind generating set, it is considered that the wind generating set has an overspeed fault. In some areas with high wind turbulence velocity, the amplitude of wind speed increase or decrease per unit time is relatively large, which can easily induce overspeed faults of wind turbines,...
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IPC IPC(8): F03D7/00
CPCF03D7/0276Y02E10/72
Inventor 樊帅周杰
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD