CN-122014521-A - System analysis method for vibration and abnormal sound problems of wind turbine generator

CN122014521ACN 122014521 ACN122014521 ACN 122014521ACN-122014521-A

Abstract

The invention belongs to the technical field of data processing, and provides a system analysis method for vibration and abnormal sound problems of a wind turbine, which comprises the steps of determining fault basic information of the wind turbine, obtaining multi-dimensional measured data of the wind turbine, respectively carrying out on-line vibration data analysis, unit operation data analysis and maintenance record analysis on the wind turbine based on the fault basic information and the multi-dimensional measured data to obtain a preliminary analysis result, carrying out layered investigation on mechanical parts of the wind turbine based on the preliminary analysis result to obtain a first investigation result, carrying out impeller pneumatic unbalance special investigation on the wind turbine based on the preliminary analysis result to obtain a second investigation result, and obtaining a system analysis result for vibration and abnormal sound problems of the wind turbine according to the first investigation result and the second investigation result. The scheme remarkably improves the running stability and reliability of the wind turbine generator, and realizes efficient and comprehensive investigation on vibration and abnormal problems of the wind turbine generator.

Inventors

ZI TONGJIANG
LI RENTANG
HU PENG
FENG JIANGZHE

Assignees

龙源(北京)新能源工程技术有限公司
龙源(西安)新能源工程技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260109

Claims (10)

1. A system analysis method for vibration and abnormal sound problems of a wind turbine generator is characterized by comprising the following steps: Determining fault basic information of the wind turbine generator, and acquiring multidimensional measured data of the wind turbine generator; Based on the fault basic information and the multidimensional measured data, respectively carrying out on-line vibration data analysis, unit operation data analysis and maintenance record analysis on the wind turbine generator to obtain a primary analysis result; Based on the preliminary analysis result, performing layered investigation on the mechanical parts of the whole wind turbine to obtain a first investigation result; based on the preliminary analysis result, performing special investigation on impeller pneumatic unbalance of the wind turbine generator to obtain a second investigation result; and obtaining a system analysis result of the vibration and abnormal sound problems of the wind turbine according to the first investigation result and the second investigation result.
2. The system analysis method for vibration and abnormal sound problems of a wind turbine according to claim 1, wherein determining the fault base information of the wind turbine comprises: determining the occurrence form, the occurrence position and the occurrence condition of the vibration and abnormal sound problems of the wind turbine generator; And taking the occurrence form, the occurrence position and the occurrence condition as fault basic information of the wind turbine generator.
3. The system analysis method for vibration and abnormal sound problems of a wind turbine according to claim 1, wherein the multidimensional measured data comprises vibration raw data of a wind turbine fault occurrence period; performing on-line vibration data analysis on the wind turbine, including: respectively carrying out time domain feature analysis and frequency domain feature analysis on the vibration original data to obtain online vibration feature parameters; comparing the online vibration characteristic parameter with a reference vibration characteristic parameter of a history normal operation period obtained in advance to obtain a first comparison result; and determining the damaged part and the damage degree of the damaged part according to the first comparison result and combining the fault basic information to obtain an online vibration data analysis result.
4. The system analysis method for vibration and abnormal sound problems of a wind turbine according to claim 1, wherein the multidimensional measured data comprises second-level operation data in a set period of time before and after the wind turbine fails; analyzing the set operation data of the wind turbine, including: comparing second-level operation data of the wind turbine generator set in a set period before and after the failure with normal operation data of other preset wind turbine sets in a same period to obtain a second comparison result; And analyzing operation change information of the wind turbine before and after the fault and other normal wind turbines in a time period according to the second comparison result, and preliminarily determining abnormal points in the wind turbine by combining the fault basic information to obtain a wind turbine operation data analysis result.
5. The system analysis method for vibration and abnormal sound problems of a wind turbine according to claim 4, wherein the second-level operation data comprise real-time wind speed, operation rotating speed, active power, main shaft gear box temperature, generator bearing temperature, oil temperature, pitch angle, pitch speed and yaw system pressure.
6. The system analysis method for vibration and abnormal sound problems of a wind turbine generator set according to claim 1, wherein the multidimensional measured data comprises historical overhaul and maintenance records of problem components in the wind turbine generator set; Performing maintenance record analysis on the wind turbine, including: According to the historical maintenance records, positioning a plurality of fault components and positions of the wind turbine generator, and determining a historical fault concentration area; And combining the fault basic information, analyzing influence factors of the historical fault concentrated region, diagnosing scheme rationality, checking quality inspection acceptance and checking the dimension of the reassembly to obtain an overhaul and maintenance record analysis result.
7. The system analysis method for vibration and abnormal sound problems of a wind turbine according to claim 1, wherein performing layered investigation on a complete machine mechanical component of the wind turbine based on the preliminary analysis result to obtain a first investigation result comprises: Based on the preliminary analysis result, respectively performing basic layer investigation, tower barrel layer investigation and cabin interior and related part investigation on the mechanical parts of the whole wind turbine generator set to obtain investigation sub-results corresponding to all layers; Summarizing the investigation sub-results corresponding to each layer to obtain a first investigation result.
8. The system analysis method for vibration and abnormal sound problems of a wind turbine according to claim 7, wherein the step of inspecting the cabin interior and related components of the whole machine mechanical component of the wind turbine comprises the steps of: the method for inspecting the motor comprises the following steps of sequentially inspecting from the generator to the impeller from the near to the far: and checking the generator, the coupling, the gear box, the main shaft, the cabin body, the yaw system, the pitch system and the impeller in sequence.
9. The system analysis method for vibration and abnormal sound problems of a wind turbine according to claim 1, wherein based on the preliminary analysis result, performing a special investigation of impeller pneumatic unbalance on the wind turbine to obtain a second investigation result, comprising: Obtaining an impeller actual measurement image; Determining the actual distance from the blade tip to the tower barrel according to the impeller actual measurement image, generating a clearance change trend graph of three blades, and judging the unbalance degree in a grading manner according to the vibration speed; And according to the unbalance degree and the primary analysis result, checking the aerodynamic unbalance influence factors of the impeller to obtain a second checking result.
10. The system analysis method for vibration and abnormal sound problems of a wind turbine according to claim 9, wherein the step of performing an investigation on aerodynamic imbalance influencing factors of an impeller according to the imbalance degree and in combination with the preliminary analysis result to obtain a second investigation result comprises: And respectively carrying out blade mass moment deviation checking, blade electric zero calibration, zero degree scale and positioning stop block deviation detection, yaw positioning accuracy checking and a variable pitch system cooperativity test according to the unbalance degree and the primary analysis result to obtain a second checking result.

Description

System analysis method for vibration and abnormal sound problems of wind turbine generator Technical Field The invention relates to the technical field of data processing, in particular to a system analysis method for vibration and abnormal sound problems of a wind turbine generator. Background The wind turbine generator is used as core equipment in the field of clean energy, and the running stability of the wind turbine generator is directly related to the stability of power generation and the safety of equipment. In the actual operation and maintenance process, the problems of unit vibration, cabin shaking, abnormal noise of a gear box and the like frequently occur, and if the problems cannot be timely checked and solved, the problems are very easy to cause fault expansion, the unit is caused to stop in an unplanned manner, the power generation reliability is affected, and even the structural safety of equipment is threatened. At present, most wind turbine generators are equipped with various monitoring devices such as cabin oscillation sensors, transmission chain online vibration monitoring devices and the like, and running state data of the wind turbine generators can be collected in real time, but the existing monitoring system has obvious technical limitations. On the one hand, the vibration frequency of the part caused by damage or faults can be only identified, vibration and abnormal sound caused by non-damage factors such as stress abnormality, assembly deviation and the like can not be effectively identified, and the operation parameters of the SCADA (Supervisory Control And Data Acquisition, data acquisition and monitoring control system) are always free from abnormal feedback, so that an alarm can be triggered only when the part has obvious faults, and early warning and accurate tracing of hidden danger are difficult to realize. On the other hand, in the fault analysis level, a single component directional investigation thought is generally adopted, technicians often focus on local components showing fault signs, an effective method for carrying out coherent analysis on each system of the whole machine and historical overhaul data is lacked, the main cause and the secondary cause of the fault cannot be distinguished, the problem is repeatedly generated after multiple times of maintenance, and the stable operation of the machine set is seriously affected. Meanwhile, the existing analysis is mostly focused on conventional components such as blade appearance, main shaft, gear box and the like, and the key influence factor of impeller pneumatic unbalance which is in direct contact with external variable load is ignored, so that the analysis result is difficult to adapt to the requirement of complex scenes. Therefore, the traditional wind turbine generator vibration and abnormal sound problem analysis scheme has the technical problems of insufficient accuracy and reliability, and insufficient efficiency and comprehensiveness. Disclosure of Invention The invention provides a system analysis method for vibration and abnormal sound problems of a wind turbine generator, which is used for solving the defects that the traditional analysis scheme for the vibration and abnormal sound problems of the wind turbine generator is insufficient in accuracy and reliability, and is not efficient and comprehensive enough. The invention provides a system analysis method for vibration and abnormal sound problems of a wind turbine, which comprises the following steps: Determining fault basic information of the wind turbine generator, and acquiring multidimensional measured data of the wind turbine generator; Based on the fault basic information and the multidimensional measured data, respectively carrying out on-line vibration data analysis, unit operation data analysis and maintenance record analysis on the wind turbine generator to obtain a primary analysis result; Based on the preliminary analysis result, performing layered investigation on the mechanical parts of the whole wind turbine to obtain a first investigation result; based on the preliminary analysis result, performing special investigation on impeller pneumatic unbalance of the wind turbine generator to obtain a second investigation result; and obtaining a system analysis result of the vibration and abnormal sound problems of the wind turbine according to the first investigation result and the second investigation result. According to the system analysis method for the vibration and abnormal sound problems of the wind turbine, provided by the invention, the fault basic information of the wind turbine is determined, and the method comprises the following steps: determining the occurrence form, the occurrence position and the occurrence condition of the vibration and abnormal sound problems of the wind turbine generator; And taking the occurrence form, the occurrence position and the occurrence condition as fault basic information of the wind turbine generator