CN-122014519-A - Wind turbine generator set transmission chain vibration evaluation method and system based on multi-source parameters

CN122014519ACN 122014519 ACN122014519 ACN 122014519ACN-122014519-A

Abstract

The invention belongs to the technical field of vibration evaluation, and discloses a method and a system for evaluating vibration of a transmission chain of a wind turbine based on multi-source parameters, wherein the method comprises the steps of determining and installing a sensor for data measurement according to the multi-source parameters evaluated by vibration of the transmission chain of the wind turbine and the transmission chain structure of the wind turbine, determining an evaluation working condition and obtaining influence parameter data of vibration of the transmission chain of the wind turbine; the method comprises the steps of presetting an evaluation index, carrying out time domain analysis and frequency domain analysis on a wind turbine generator transmission chain according to measurement time and influence parameter data, determining an evaluation index actual measurement value of a wind turbine generator transmission chain measurement point, obtaining an evaluation index reference value of the wind turbine generator transmission chain measurement point, carrying out comparison analysis with the evaluation index actual measurement value, and evaluating the vibration state of the wind turbine generator transmission chain.

Inventors

GAO JUNYUN
LEI BIN
ZHU SHAOHUI
HE DUO
WANG XIAODONG
HUANG HU

Assignees

太原重工股份有限公司

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (9)

1. A wind turbine generator system transmission chain vibration evaluation method based on multi-source parameters is characterized by comprising the following steps: Determining and installing a sensor to perform data measurement according to multisource parameters of wind turbine generator transmission chain vibration evaluation and wind turbine generator transmission chain structure, determining an evaluation working condition and acquiring influence parameter data of wind turbine generator transmission chain vibration; presetting an evaluation index, carrying out time domain analysis and frequency domain analysis on a transmission chain of the wind turbine according to the measurement time and the influence parameter data, and determining an actual measurement value of the evaluation index of a measurement point of the transmission chain of the wind turbine; and acquiring an evaluation index reference value of a wind turbine generator transmission chain measurement point, comparing and analyzing with an evaluation index actual measurement value, and evaluating the vibration state of the wind turbine generator transmission chain.
2. The method for evaluating vibration of a drive train of a wind turbine according to claim 1, wherein the multisource parameters for evaluating vibration of the drive train of the wind turbine include a wind speed influencing parameter, a power influencing parameter, a vibration influencing parameter and a fault influencing parameter of the drive train of the wind turbine.
3. The multi-source parameter-based wind turbine transmission chain vibration evaluation method according to claim 1 is characterized in that a wind turbine transmission chain structure comprises a main bearing, a gear box and a generator, the sensor is an acceleration sensor and is arranged at a wind turbine transmission chain measuring point, and the wind turbine transmission chain measuring point comprises at least one position in the wind turbine transmission chain structure.
4. The method for evaluating vibration of a transmission chain of a wind turbine generator based on multi-source parameters according to claim 1, wherein vibration of the transmission chain of the wind turbine generator continuously changes along with wind speed and is in a rule of being proportional to the wind speed, an evaluation working condition is determined, a normal power generation working condition that the rotation speed of a generator reaches a rated rotation speed and the power reaches the rated power of the wind turbine generator is selected, a wind speed sampling time is set, and a data measurement time is synchronous with the wind speed sampling time.
5. The method for evaluating vibration of a drive train of a wind turbine generator based on multi-source parameters of claim 1, wherein the time domain analysis comprises: Presetting an evaluation index of vibration of a transmission chain of the wind turbine, wherein the evaluation index comprises a time domain evaluation index and a frequency domain evaluation index; And obtaining an average value and a standard deviation of a wind speed time sequence according to the measurement time and the influence parameter data, calculating to obtain the turbulence intensity of the wind speed, and obtaining a time domain evaluation index actual measurement value of a time domain evaluation index measuring point of the wind turbine transmission chain by taking the time domain evaluation index as a turbulence normalized root mean square value of vibration acceleration in order to eliminate the influence of wind speed fluctuation on the wind turbine transmission chain vibration.
6. The method for evaluating vibration of a transmission chain of a wind turbine generator based on multi-source parameters according to claim 5, further comprising the steps of acquiring an impact signal generated by the transmission chain failure of the wind turbine generator and evaluating the signal impact degree when the transmission chain of the wind turbine generator fails, taking a time domain evaluation index as a turbulence normalization kurtosis factor of vibration acceleration, and supplementing a time domain evaluation index actual measurement value of a transmission chain measurement point of the wind turbine generator.
7. The method for evaluating vibration of a drive train of a wind turbine generator based on multi-source parameters according to claim 1, wherein the frequency domain analysis comprises: carrying out frequency spectrum analysis on the influence parameter data, extracting characteristic parameters of vibration signals, and positioning fault positions and fault types of a transmission chain of the wind turbine generator; when the transmission chain of the wind turbine generator is normal, acquiring a frequency amplitude corresponding to the excitation frequency of the transmission chain structure of the wind turbine generator, and recording the frequency amplitude as a frequency domain evaluation index reference value of a transmission chain measurement point of the wind turbine generator; When the wind turbine generator system transmission chain is in a fault period, obtaining a frequency amplitude corresponding to the fault frequency of the wind turbine generator system transmission chain structure according to the measurement time corresponding to the fault period, and recording the frequency amplitude as a frequency domain evaluation index actual measurement value of a wind turbine generator system transmission chain measurement point.
8. The method for evaluating vibration of a drive train of a wind turbine generator based on multiple source parameters of claim 1, wherein evaluating the vibration state of the drive train of the wind turbine generator comprises: Counting the measurement data of a plurality of wind turbines of the same type under the normal power generation working condition, and obtaining an evaluation index reference value of a transmission chain measurement point of the wind turbines; Comparing and analyzing the actual measurement value of the evaluation index with the reference value of the evaluation index, and judging that the vibration state of the transmission chain of the wind turbine corresponding to the measurement time is abnormal when the actual measurement value of the evaluation index is larger than 1.25 times of the reference value of the evaluation index, wherein the transmission chain of the wind turbine fails; When the actual measurement values of the evaluation indexes are smaller than the reference values of the evaluation indexes, judging that the vibration state of the transmission chain of the wind turbine corresponding to the measurement time is normal, and the transmission chain of the wind turbine runs stably; When the abnormal vibration state of the transmission chain of the wind turbine generator is judged, carrying out fault analysis on the transmission chain of the wind turbine generator and giving fault maintenance suggestions according to the actual measurement value of the evaluation index, the reference value of the evaluation index and the evaluation index.
9. Wind turbine generator system drive chain vibration evaluation system based on multisource parameter, characterized by comprising: The data acquisition module is used for acquiring the wind speed and power of the wind turbine generator and vibration acceleration data output by an acceleration sensor arranged at a transmission chain measurement point of the wind turbine generator; the evaluation index calculation module is used for judging whether the evaluation working condition is met according to the wind speed and the power, and when the evaluation working condition is met, acquiring vibration acceleration data according to the measurement time and calculating to obtain a time domain evaluation index actual measurement value and a frequency domain evaluation index actual measurement value of a transmission chain measurement point of the wind turbine generator; and the evaluation judging module is used for comparing and analyzing the measured value of the time domain evaluation index and the measured value of the frequency domain evaluation index of the measuring point of the transmission chain of the wind turbine generator with the corresponding evaluation index reference value to obtain the vibration evaluation conclusion of the transmission chain of the wind turbine generator.

Description

Wind turbine generator set transmission chain vibration evaluation method and system based on multi-source parameters Technical Field The invention belongs to the technical field of vibration evaluation, and particularly relates to a method and a system for evaluating vibration of a transmission chain of a wind turbine based on multi-source parameters. Background The conventional wind turbine generator system driving chain vibration evaluation standard only evaluates according to the root mean square value of the time domain vibration acceleration or vibration speed signal, the influence of the wind speed change and the excitation frequency generated when the wind turbine generator system driving chain component is normal on the driving chain vibration is not considered, the influence of the fault frequency amplitude change generated when the wind turbine generator system driving chain component is in fault in the frequency domain on the driving chain state is not considered, and the wind turbine generator system driving chain vibration state cannot be comprehensively evaluated. Disclosure of Invention In order to solve part or all of the technical problems in the prior art, the invention provides a wind turbine generator transmission chain vibration evaluation method and system based on multi-source parameters. The wind turbine generator set transmission chain vibration evaluation method based on the multi-source parameters comprises the following steps: Determining and installing a sensor to perform data measurement according to multisource parameters of wind turbine generator transmission chain vibration evaluation and wind turbine generator transmission chain structure, determining an evaluation working condition and acquiring influence parameter data of wind turbine generator transmission chain vibration; presetting an evaluation index, carrying out time domain analysis and frequency domain analysis on a transmission chain of the wind turbine according to the measurement time and the influence parameter data, and determining an actual measurement value of the evaluation index of a measurement point of the transmission chain of the wind turbine; and acquiring an evaluation index reference value of a wind turbine generator transmission chain measurement point, comparing and analyzing with an evaluation index actual measurement value, and evaluating the vibration state of the wind turbine generator transmission chain. Further, in the method for evaluating vibration of the transmission chain of the wind turbine generator based on the multi-source parameters, the multi-source parameters for evaluating vibration of the transmission chain of the wind turbine generator include wind speed influencing parameters, power influencing parameters, vibration influencing parameters and fault influencing parameters of the transmission chain of the wind turbine generator. Further, in the method for evaluating vibration of the transmission chain of the wind turbine based on the multi-source parameters, the transmission chain structure of the wind turbine comprises a main bearing, a gear box and a generator, the sensor is an acceleration sensor and is arranged at a transmission chain measuring point of the wind turbine, and the transmission chain measuring point of the wind turbine comprises at least one part of the transmission chain structure of the wind turbine. Further, in the wind turbine generator system driving chain vibration evaluation method based on the multisource parameters, wind turbine generator system driving chain vibration is continuously changed along with wind speed and is in a direct proportion to the wind speed, an evaluation working condition is determined, a normal power generation working condition that the rotating speed of a generator reaches the rated rotating speed and the power reaches the rated power of the wind turbine generator system is selected, wind speed sampling time is set, and data measurement time is synchronous with the wind speed sampling time. Further, in the wind turbine generator system driving chain vibration evaluation method based on the multi-source parameters, the time domain analysis includes: Presetting an evaluation index of vibration of a transmission chain of the wind turbine, wherein the evaluation index comprises a time domain evaluation index and a frequency domain evaluation index; And obtaining an average value and a standard deviation of a wind speed time sequence according to the measurement time and the influence parameter data, calculating to obtain the turbulence intensity of the wind speed, and obtaining a time domain evaluation index actual measurement value of a time domain evaluation index measuring point of the wind turbine transmission chain by taking the time domain evaluation index as a turbulence normalized root mean square value of vibration acceleration in order to eliminate the influence of wind speed fluctuation on the wind turbine transmission