Wind Turbine Rotor Rotation Control for Blade Installation Vibration
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Solution Overview
Problem
The installation and maintenance of wind turbine blades pose a challenge due to severe vibrations caused by changing bending moment loads, which can lead to damage to the turbine components.
Innovation Solution
A rotor rotation control system that includes a rotation unit, a driving unit, and a processor to determine bending moment load switching positions and adjust the operation state of the rotation unit, balancing the load changes during blade installation or adjustment to prevent severe vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotor is rotated to adjust blade position during installation or maintenance, then the blade can be positioned at different angles for installation or maintenance access, but the gravity of the blade causes sharp change in bending moment load direction which leads to severe vibration of the wind turbine
Solution Approach 1:
The control system pre-identifies bending moment load switching positions based on blade angle and gravity direction. Before the rotor reaches these critical positions during rotation, the system prepares to adjust rotation speed or direction, preventing severe vibration rather than reacting after it occurs.
Solution Approach 2:
The rotation unit dynamically adjusts its operation by changing rotation speed or direction when approaching bending moment load switching positions. This dynamic control allows the system to adapt to changing load conditions during rotor rotation, smoothing the transition through critical angles where blade gravity causes severe vibration.
2Productivity
If the rotor rotation speed is increased to improve installation efficiency, then more blades can be installed faster, but the vibration caused by bending moment load changes becomes more severe
Solution Approach 1:
The control system implements periodic adjustment of rotation speed based on the periodic nature of bending moment load changes as the rotor rotates. When approaching critical switching positions, the system slows down; when passing through these positions, it can accelerate again. This periodic speed modulation maintains installation efficiency while preventing severe vibration at critical moments.
Solution Approach 2:
The system changes the rotation speed parameter dynamically during the rotation process. By adjusting this key parameter based on real-time blade angle and load conditions, the system optimizes the balance between installation speed and vibration control, allowing faster rotation when safe and slower rotation when bending moment loads are critical.
Data Source
AI summary
A rotor rotation control system for a wind turbine and a control method thereof are provided. The control system includes a rotation unit configured to drive a rotor of the wind turbine to rotate relative to an engine base of the wind turbine, a driving unit configured to drive the rotation unit, and a processor configured to determine a bending moment load switching position on a rotating shaft of the rotor, and output an adjustment instruction to the driving unit based on the bending moment load switching position.