Publish Time: 2024-05-24 Origin: Site
Wind Turbine Vibration Monitoring System
Vibration monitoring system plays a vital role in wind power operation and maintenance, through real-time monitoring of wind turbine vibration, can be found in advance potential faults, to ensure the safe and stable operation of the wind power system. As a wind power operation and maintenance service personnel, it is important to understand the vibration monitoring system's working principle, structural composition, operating characteristics and common fault handling methods. This paper will analyze the vibration monitoring system operation and maintenance methods, for wind power operation and maintenance personnel to provide practical guidance.
Working Principle
The main working principle of the vibration monitoring system is to collect vibration signals in real time through the vibration sensors installed in each key part of the wind turbine, and convert them into electrical signals for processing. By analyzing the frequency, amplitude and other characteristics of these vibration signals, the operational status of the wind turbine components can be judged, and potential faults can be detected in advance.
Main structure of the drive train
As shown in the figure, the wind turbine is mainly composed of: wind turbine, pitch system, nacelle, gear box, yaw system, braking system, generator, electrical system, main control system, tower and foundation and other subsystems.
Selection of monitoring points
For the condition monitoring of wind turbines, effectively obtaining suitable monitoring signals is the guarantee for correctly judging the working status of the equipment. Generally speaking, the selection of measurement points has the following points to consider.
1, the measurement point should be set in the key parts of the equipment
2, the measurement point should avoid the parts of the harsh working environment
3, the measurement point should be determined according to the vibration characteristics of the monitoring object measurement point should be as close as possible to the object being measured
4, the number of measurement points should be appropriate
5, the location of the measurement point should remain stable
Based on the above consideration of the principle of selection of measurement points, and according to the previous analysis of the failure characteristics of wind turbines and the determination of the monitoring object, it can be determined that the main location of the vibration monitoring point of the system is shown in the figure below.
| Measurement point | Measurement object | Testing method | Sensor position | Sensor type |
| 1 | Spindle bearings | Radial | Directly below the bearing seat | Low speed acceleration sensor |
| 2 | Spindle bearings | Axial | Directly below the bearing seat | Low speed acceleration sensor |
| 3 | Second main bearing | Radial | Directly below the bearing seat | Low speed acceleration sensor |
| 4 | Planetary gear | Radial | Input gear section, bearing seat | Low speed acceleration sensor |
| 5 | Planetary gear | Radial | Above the planetary gears | Standard accelerometer |
| 6 | Secondary gear | Radial | Between the inlet and intermediate shaft | Standard accelerometer |
| 7 | Secondary gear | Axial | Between intermediate shaft and high-speed shaft | Standard accelerometer |
| 8 | Alternator | Radial | Below the free end bearing | Standard accelerometer |
| 9 | Alternator | Radial | Below the input bearing | Standard accelerometer |
| 10 | Principal axis | Radial | Principal axis | Speed sensor |
| 11 | Generator input terminal | Radial | Generator input shaft | Speed sensor |
Vibration online monitoring system composition
It consists of sensors, data collectors, field servers, and monitoring and analysis software.
Vibration Monitoring Process
After collecting the vibration data, the analysis process on the figure, after the time domain processing, frequency domain processing, the envelope demodulation algorithm is used to complete.
Xiyuan Electronics has launched two vibration sensors to further help realize vibration monitoring and health management of wind turbines.
Product Overview
| Main technical indicators | |||
| Features | Unit | A26 | A26D |
| D100T05 | 500T05 | ||
| Measuring range (peak) | g | ±50 | ±10 |
| Sensitivity (25°C) | mV/g | 100 | 500 |
| Frequency response (1dB) | Hz | 1-9,000 | 0.5-5,000 |
| Frequency response (3dB) | Hz | 0.5 | 0.2- |
| -14,000 | 10,000 | ||
| Mounting resonance frequency | Hz | ≥25000 | ≥12000 |
| Transverse sensitivity | % | ≤5 | ≤5 |
| Excitation voltage | VDC | 18~28 | 18~28 |
| (Constant current source) | |||
| Constant current source excitation | mA | 2~10 | 2~10 |
| Full scale output (peak) | V | ±5 | ±5 |
| Noise (rms) | μV | <50 | <80 |
| Bias voltage | VDC | +10-14V | +10-14V |
| Output impedance | Ω | <100 | <100 |
| Mounting insulation to ground | Ω | ≥10^8Pressure resistance 4000VAC /1min | ≥10^8Pressure resistance 4000VAC /1min |
| Operating temperature | ℃ | -40~+120 | -40~+120 |
| Shock limit (peak) | g | ±5000 | ±5000 |
| Structure and piezo material | Shear/ | Shear/ | |
| PZT-5 | PZT-5 | ||
| Outline dimension | See external dimensions Fig. 2 | See external dimensions Fig. 2 | |
| Housing material | 304 stainless steel | 304 stainless steel | |
| Electrical connector | MIL-C-5015 2-Pin socket | MIL-C-5015 2-Pin socket | |
| Mounting method | 1/4-28 | 1/4-28 | |
| Protection class | IP65 | IP65 | |
| Weight | g | ~80 | ~80 |
| Mounting bolts | 1/4-28 to M6 | 1/4-28 to M6 | |
| Connection cable | DJ03-3M | DJ03-3M | |
Product Size
Temperature Curve
Loudness Curve
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