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Monitoring method and monitoring device and monitoring system of wind turbine generator condition

A condition monitoring device and technology for wind turbines, applied in the direction of measuring devices, wind power generation, wind turbines, etc., can solve problems such as wind turbine collapse, tower vibration intensification, natural frequency deviation, etc., to ensure normal operation and prolong service life Effect

Inactive Publication Date: 2013-03-20
SINOVEL WIND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Under the influence of load impact, the state of the tower and the foundation will decline, that is, the parameters of the tower during operation cannot meet the design standards. For example, the natural frequency of the tower deviates from the set value, resulting in increased vibration at the top of the tower. This will increase the fatigue load and limit load on other components of the wind turbine, reduce the service life of the wind turbine, and even cause the tower to resonate with other components
If the state of the tower and the foundation deteriorates seriously, it may cause serious failure of the wind turbine, or even cause the wind turbine to collapse

Method used

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  • Monitoring method and monitoring device and monitoring system of wind turbine generator condition
  • Monitoring method and monitoring device and monitoring system of wind turbine generator condition
  • Monitoring method and monitoring device and monitoring system of wind turbine generator condition

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Embodiment 1

[0029] figure 1 It is a flow chart of the wind turbine condition monitoring method provided in Embodiment 1 of the present invention. The method can be executed by the controller in the wind turbine condition monitoring system, and can be realized by software and / or hardware. like figure 1 As shown, the specific steps of the method are as follows:

[0030] Step 101, the controller obtains the vibration signal at the top of the wind turbine tower;

[0031] Wherein, the controller obtains the vibration signal at the top of the tower of the wind turbine, specifically in this embodiment, obtains the vibration acceleration signals in the horizontal direction detected by the vibration acceleration sensor in the direction of the transmission chain of the wind turbine and the direction perpendicular to the transmission chain, as the vibration signal . The vibration acceleration sensor can be a piezoelectric vibration acceleration sensor, which is arranged on the main frame at the t...

Embodiment 2

[0039] Figure 2a It is a flow chart of the time domain analysis method in the wind turbine condition monitoring method provided by Embodiment 2 of the present invention. The method can be executed by the controller in the wind turbine condition monitoring system, and can be implemented in the form of software and / or hardware. Based on the foregoing embodiments, this embodiment further optimizes the time-domain analysis process of the acquired vibration signal at the top of the tower. like Figure 2a As shown, the time-domain analysis is performed on the vibration signal obtained at the top of the tower to obtain the time-domain characteristic value reflecting the vibration state of the top of the tower. The specific steps are as follows:

[0040] Step 201, the controller calculates the vibration signal to obtain the maximum value, minimum value, average value and standard deviation of the vibration signal amplitude;

[0041]On the basis of the above-mentioned embodiments, t...

Embodiment 3

[0066] image 3 a is a schematic structural diagram of a wind turbine condition monitoring device provided in Embodiment 3 of the present invention. like image 3 As shown in a, the wind turbine status monitoring device includes: a signal acquisition module 11 , a signal analysis module 12 and a status judgment module 13 .

[0067] Wherein, the signal acquisition module 11 is used to acquire the vibration signal at the top of the wind turbine tower, specifically to acquire the horizontal vibration acceleration signal detected by the vibration acceleration sensor in the direction of the transmission chain of the wind turbine and the direction perpendicular to the transmission chain, as the Vibration signals, wherein the vibration acceleration sensor is arranged on the main frame at the top of the tower and rotates with the cabin. The signal analysis module 12 is used to analyze the vibration signal acquired by the signal acquisition module 11, including time domain analysis a...

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Abstract

The invention relates to a monitoring method of a turbine generator condition, a monitoring device of a turbine generator condition and a monitoring system of a turbine generator condition. The control method of the turbine generator condition comprises the steps of obtaining a vibration signal of the top of a wind turbine generator tower; performing vibration signal analysis which comprises time-domain analysis and frequency-domain analysis to obtain a time-domain feature value and a frequency-domain feature value reflecting a vibration condition of the top of the wind turbine generator tower; and judging conditions of the wind turbine generator tower and a substrate of the wind turbine generator according to the time-domain feature value and the frequency-domain feature value. According to the monitoring method of the turbine generator condition, the monitoring device of the turbine generator condition and the monitoring system of the turbine generator condition, the vibration signal of the top of the wind turbine generator tower and the substrate is detected and is time-domain analyzed and frequency-domain analyzed so that the time-domain feature value and the frequency-domain feature value reflecting the condition of the tower and the substrate are obtained. The time-domain feature value and the frequency-domain feature value are compared with a set value so that whether the wind turbine generator tower and the substrate are declined can be judged. The monitoring method of the turbine generator condition, the monitoring device of the turbine generator condition and the monitoring system of the turbine generator condition have the advantages of real-time monitoring the conditions of the tower and the substrate, ensuring normal operation of the wind turbine generator and prolonging service life of the wind turbine generator.

Description

technical field [0001] The invention relates to condition monitoring technology, in particular to a method, device and system for condition monitoring of wind turbines. Background technique [0002] The wind power generating set is a device that drives the generator to rotate by the impeller turning against the wind, and converts wind energy into mechanical energy and then into electrical energy. It consists of an impeller, a nacelle, a tower and a foundation. Support and maintain the nacelle and impeller rotation. The aerodynamic load, gravity load, and inertial force load received by the wind turbine during operation will all be borne by the tower and foundation. Therefore, the tower and foundation are key components to ensure the normal operation of the wind turbine. [0003] Under the influence of load impact, the state of the tower and the foundation will decline, that is, the parameters of the tower during operation cannot meet the design standards. For example, the n...

Claims

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Application Information

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IPC IPC(8): G01H17/00F03D7/00
CPCY02E10/723Y02E10/72
Inventor 杨天时袁瑛张雪岩温南楠席盛代
Owner SINOVEL WIND GRP
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