Wind Turbine Active Damping During Large Power Reference Changes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large changes in power reference signals to wind turbines can cause synchronization of active damping components, leading to significant oscillations that destabilize the power grid, particularly in wind parks with a high wind power contribution.
Innovation Solution
A method and device for controlling active damping in wind turbines by determining the relative power reference change and adjusting the amount of damping based on this change, using low-pass filters to differentiate between current and steady-state power values, and applying reduced damping during significant power reference changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If active damping is applied to dampen structural oscillations in wind turbines, then structural loads are reduced, but grid stability deteriorates when large power reference changes occur
Solution Approach 1:
The active damping control is made dynamic by adjusting the damping reference based on the rate of change of power reference. When power reference changes rapidly (large derivative), the damping reference is reduced or deactivated. When power reference is stable, full active damping is applied. This dynamic adjustment resolves the contradiction by adapting the damping level to operational conditions.
Solution Approach 2:
The control system monitors the derivative of the power reference signal and uses this parameter to modulate the damping reference. By changing the damping parameter based on the power reference rate of change, the system optimizes both structural protection and grid stability under varying operational conditions.
2Duration of action of stationary object
If active damping components are used to dampen mechanical oscillations, then structural component durability is improved, but power output stability deteriorates when damping components align in phase
Solution Approach 1:
The system uses feedback from the power reference signal derivative to continuously adjust the damping reference. When multiple turbines' damping components align and cause oscillations in power output, the feedback mechanism detects the rapid power reference changes and reduces damping accordingly, preventing destabilization while maintaining structural benefits during normal operation.
Data Source
AI summary
A method is provided of controlling an amount of active damping to be applied by an active damping system during operation of a wind turbine, the method including (a) receiving a power reference signal indicative of the power to be produced by the wind turbine, (b) determining a relative power reference change indicative of a change in the power reference signal, (c) determining the amount of active damping to be applied based on the relative power reference change, and (d) outputting the determined amount of active damping to the active damping system. Furthermore, a corresponding device, a wind turbine including such a device, a wind park including such wind turbines, and a computer program product are provided.