Active Nacelle Mass Damper for Wind Turbine Installation Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wind turbines, particularly during installation, experience significant oscillations due to wind and wave forces, leading to instability and difficulty in attaching rotor blades, especially in offshore installations where water waves exacerbate the issue.
Innovation Solution
A mass damper module with an active tuned mass damper is attached to the nacelle, providing damping to stabilize the structure and enable rotor blade installation by controlling lateral vibrations through translational movement of a movable mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the nacelle is attached to the tower without rotor blades, then the installation process can proceed, but the structure becomes top-heavy and susceptible to wind and wave forces causing tower oscillation and lateral motion
Solution Approach 1:
An active tuned mass damper system is introduced as an intermediary device between the nacelle and the tower. This system includes a movable mass that can be actively controlled to counteract oscillations, serving as a mediator that stabilizes the structure during the critical installation phase without requiring the full rotor assembly to be in place.
Solution Approach 2:
The mass damper system transitions from a static structure to a dynamic stabilization solution. The movable mass of the damper is actively controlled to move in response to detected oscillations, creating a dynamic counterbalance that adapts to changing wind and wave conditions during installation.
2Stability of the object's composition
If a passive mass damper is used to reduce vibration, then the structure becomes more stable, but the device complexity and cost increase
Solution Approach 1:
The system incorporates sensors that continuously monitor tower oscillations and feed this information to a control system. The control system processes the feedback signals and adjusts the position of the movable mass in real-time, creating a closed-loop control system that achieves superior vibration control with optimized complexity.
Solution Approach 2:
The active tuned mass damper system is self-regulating, using its own sensors and actuators to detect and counteract oscillations without requiring external intervention. The system automatically adjusts its behavior based on real-time conditions, reducing the need for complex external control mechanisms.
3Ease of operation
If the nacelle is stabilized during installation, then rotor blade attachment becomes easier, but additional equipment and setup time are required
Solution Approach 1:
The active tuned mass damper system is installed and activated before rotor blade attachment begins. This preliminary stabilization ensures that the tower and nacelle are already controlled for oscillations during the critical blade attachment operation, making the subsequent operation easier and safer.
Solution Approach 2:
The mass damper system serves multiple functions: it stabilizes the structure during installation, facilitates safer blade attachment operations, and can remain in place to provide ongoing vibration control during turbine operation. This multi-functionality justifies the additional equipment requirement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Stabilizes the wind turbine structure during installation, allowing for easier attachment of rotor blades and improving dynamic stability, while being cost-effective and compatible with various turbine sizes.
Implementation Method 1
an active tuned mass damper controllable to damp vibration of the wind turbine installation
Implementation Method 2
providing damping to stabilize the structure and enable rotor blade installation by controlling lateral vibrations
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A mass damper module (600) for a wind turbine installation comprises: an attachment interface (603a-d) adapted to removably attach the mass damper module to structural lifting parts (303a-d) of a nacelle (300) of the wind turbine installation; and an active tuned mass damper (601) controllable to damp vibration of the wind turbine installation when the mass damper module is so attached to the nacelle and the nacelle is attached to a tower (200) to form the wind turbine installation.