Method and system for computing yaw angle of fan

An angle calculation and yaw technology, which is applied to wind turbines, wind turbine control, engines, etc., can solve problems such as difficulty in obtaining wind turbine yaw angles, and achieve the effect of avoiding inaccurate calculations and ensuring accuracy

Active Publication Date: 2011-10-12
SANY ELECTRIC CO LTD
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Problems solved by technology

When the above calculation method is used to calculate the yaw angle of the wind turbine during the yaw process, it is difficult to obtain the yaw angle of the wind turbine during the yaw process because the sensor signal is affected by factors such as interference

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  • Method and system for computing yaw angle of fan
  • Method and system for computing yaw angle of fan
  • Method and system for computing yaw angle of fan

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The present invention fixes two proximity switch sensors in the nacelle of the fan, and the proximity switch sensors are close to the yaw slewing bearing gear. When the wind turbine yaws, the nacelle rotates, but the yaw slewing ring gear is fixed, and the proximity switch sensor rotates around the yaw slewing ring gear synchronously with the nacelle. According to the detection distance of the proximity switch sensor, reasonably set the position of the proximity switch sensor, so that when the proximity switch sensor faces the convex tooth, it detects the metal material and generates a high-level signal; when it faces the concave tooth, it cannot detect the metal material and generates low signal. When the proximity switch...

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Abstract

The invention relates to a method for computing a yaw angle of a fan. In a cabin of the fan, at least two approach switch sensors are arranged at a position adjacent to a yaw rotary supporting gear. The method comprises the following steps of: when the fan yaws and the approach switch sensors rotate around the yaw rotary supporting gear and correspond to convex teeth and concave teeth positions of the yaw rotary supporting gear, generating different level signals; combining the level signals into a detection signal code, comparing the detection signal code with a preset code, and if cyclic sequences are not accordant, filtering out the level signals; and if the cyclic sequences are accordant, computing the yaw angle according to the level signals. The invention also discloses a system forcomputing the yaw angle of the fan. By the invention, high and low level signals for computation of the yaw angle are normal signals; inaccurate computation of the yaw angle, caused by a fault signal, is effectively avoided; and the computation accuracy of the yaw angle is guaranteed.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and system for calculating the yaw angle of a wind turbine. Background technique [0002] Wind energy is a clean and renewable energy source. As the main form of wind energy utilization, wind power generation is one of the renewable energy power generation methods with the most mature technology, the most large-scale development conditions and the most commercial development prospects. In the process of wind power generation, the wind direction may change at any time, which requires yaw control of the wind turbine. Yaw control means that the wind turbine can automatically and accurately face the wind within the available wind speed range, and automatically untie the cable when the continuous tracking of the wind direction may cause cable entanglement, so that the wind turbine can run smoothly and reliably, efficiently utilize wind energy, save a lot of ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 余铁辉翁艳崔维涛龙伟生
Owner SANY ELECTRIC CO LTD
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