Wind generating set blade load measurement device and measurement method thereof

A wind turbine and load measurement technology, which is applied in the direction of measuring the change force of the optical properties of the material when it is stressed, can solve the problems of easy failure, difficulty in large-capacity network measurement, complicated sensor wiring, etc., and achieve accurate Calculation, easy to reuse the effect of network measurement

Active Publication Date: 2014-04-02
CHENGDU FORWARD TECH
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Problems solved by technology

However, there are few load monitoring sensors suitable for wind power blades at present. The common resistive strain sensors are prone to failure in the harsh environment of wind power generation, such

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  • Wind generating set blade load measurement device and measurement method thereof
  • Wind generating set blade load measurement device and measurement method thereof
  • Wind generating set blade load measurement device and measurement method thereof

Examples

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Embodiment Construction

[0027] In order to describe the technical content, structural features, goals and effects of the present invention in detail, the following examples are given and described in detail with accompanying drawings.

[0028] see figure 1 , figure 2 and image 3 According to the present invention, a load measuring device for blades of a wind power generating set includes at least three fiber grating sensor arrays, a demodulation module and a load data processing module.

[0029] Each fiber grating sensor array is installed on the inner surface of the blade root of the wind turbine, and each fiber grating sensor array is composed of at least four fiber grating sensor groups in series, and each fiber grating sensor group consists of a strain sensor and a temperature sensor. Each fiber grating sensor group is composed of a strain sensor and a temperature sensor. The strain sensor is used to measure the corresponding strain of the blade under load, and the temperature sensor is used...

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Abstract

The invention discloses a wind generating set blade load measurement device. The wind generating set blade load measurement device comprises at least three fiber bragg grating sensor arrays, a demodulation module and a load data processing module, wherein each fiber bragg grating sensor array is formed by connecting at least four fiber bragg grating sensor groups in series sequentially; each fiber bragg grating sensor group consists of a strain sensor and a temperature sensor; the strain sensor is used for measuring the strain amount of a blade when the blade is loaded; the temperature sensor is used for compensating the temperature drift of the strain sensor caused by the ambient temperature change; the demodulation module is used for converting the signals of each strain sensor and each temperature sensor into corresponding strain amount values and temperature values respectively; the load data processing module is integrated with a load algorithm to process the strain amount value and the temperature value of each measurement point, convert the strain amount value and the temperature value of each temperature point into a waving bending moment and a shimmy bending moment, and output the waving bending moment and the shimmy bending moment to a pitch-variable control system or a master control system of a wind generating set.

Description

technical field [0001] The invention relates to the field of wind power generation monitoring, in particular to a load measuring device applied to a blade load of a wind power generating set and a measuring method thereof. Background technique [0002] The cost of wind power generation is the main factor restricting the development of the wind power industry. In order to reduce the cost of kilowatt-hour power generation, the size of the designed wind turbine blades is getting larger and larger. The diameter of large wind turbine blades has reached more than 100 meters, and the weight of a single blade is several Ten tons, in the area swept by the blades, due to the influence of terrain and other factors, the wind speed is uneven, resulting in uneven wind loads on the blades, prone to excessive fatigue of the blades and vibration of the wind turbine, reducing power generation efficiency. Therefore, it is very important to know the load of wind blades in real time. Knowing the...

Claims

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Application Information

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IPC IPC(8): G01L1/24
Inventor 代勇波
Owner CHENGDU FORWARD TECH
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