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Monitoring scheme for the sway posture of wind turbine tower
1. Overall Design of the Scheme
Figure 1 Overall Architecture Design Schematic
1.1. Overall Architecture Design
1.1. Architecture Design Description
1.1.1. Overview
This scheme aims to achieve real-time monitoring of data such as the tower sway and cabin heading of wind turbines by deploying attitude sensors at various levels of the turbine and RTK monitoring terminals in the turbine cabin, in order to restore the real-time attitude of the turbine tower.
1.1.2. Description of Each Part
The architecture design of this project includes the following parts:
1. Device Management Cloud Platform: A cloud platform system for unified management of the status of various wind turbine units and their supporting facilities, which also serves as a centralized cloud platform for storing, supervising, and analyzing data collected by various sensors in this project;
2. Edge Computing Terminal: A computing platform used for data preprocessing on-site, capable of fusing and preprocessing data from multiple local systems to improve monitoring efficiency, enhance system real-time performance, and reduce the pressure on the cloud platform regarding data access management and storage management;
3. Attitude Sensors: Acceleration and tilt sensors deployed on various maintenance platforms of the turbine tower. By monitoring the three-dimensional acceleration and angle data of the turbine tower, it achieves attitude monitoring of the turbine tower;
Figure 3.1 Installation Drawing of Wind Turbine Sway Angle and Acceleration
4. Self-Differential RTK Terminal: Two antennas fixed 1 meter apart, installed outside the turbine cabin, providing high-precision real-time latitude and longitude location information.
5. RTK Reference Station: An RTK reference station is set up inside the wind farm booster station, which communicates differentially with each turbine's RTK terminal through the existing turbine ring network, with an interface method of RJ45 (Ethernet).
2. Hardware Requirements
2.1. Self-Differential RTK Terminal
1. Positioning Accuracy:
》 Static ≤1cm;
》 Dynamic ≤2~3cm;
2. Sampling Frequency: 10Hz (not less than 5Hz);
3. Function: Positioning + Orientation;
4. Communication Interface and Protocol:
》 Directional positioning data transmission: 485 bus ModBus protocol
》 Differential data: Ethernet communication
2.2. Attitude Sensors
1. Output Data: Three-dimensional acceleration, angle;
2. Angle Range: X, Z ±180°, Y ±90°
3. Angle Accuracy:
》 X, Y axis static: 0.05°;
》 X, Y axis dynamic: 0.1°;
》 Z axis: 1°
4. Sampling Rate: ≥100Hz;
5. Acceleration Range: ±5g;
6. Communication Method: 485 bus ModBus protocol;
7. Strong magnetic field environment, must be resistant to magnetic field interference.
Inclination monitoring
X, Y axis, industrial design, small size, low power consumption
Compass heading
X, Y, Z three axis, attitude calculation measurement algorithm
Imu inertial sensor
Three-axis angle, angular velocity, acceleration, magnetic field measurement
Attitude heading reference system
Meet the static, dynamic, high and low temperature of a variety of complex environmental use
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