Offshore Wind Park Damping Control for Power Oscillation Reduction
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Solution Overview
Problem
Offshore wind farms face challenges in maintaining grid stability due to large power output oscillations caused by mechanical vibrations from sea waves, which conventional damping methods fail to adequately address.
Innovation Solution
A method for controlling multiple offshore wind turbines to reduce mechanical oscillations by using wave characteristic information, wind turbine operational state information, and wind characteristic information to determine damping power components for each turbine, thereby minimizing power oscillations across the wind park.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional active tower damper (ATD) is used at each individual wind turbine to dampen tower vibrations, then mechanical oscillations of individual wind turbines are reduced, but power oscillations of the entire wind park increase leading to grid instability
Solution Approach 1:
The patent combines the damping actions of multiple individual wind turbines into a coordinated farm-level control system. By merging the control strategies of individual ATDs with farm-wide power oscillation damping, the system achieves both mechanical oscillation reduction at turbine level and power oscillation reduction at farm level, resolving the contradiction between individual turbine stability and overall grid stability.
Solution Approach 2:
The invention implements a feedback mechanism where power oscillation measurements from the wind park are used to adjust the damping control of individual turbines. The system continuously monitors power output oscillations and modifies the ATD control parameters accordingly, creating a closed-loop system that adapts to maintain grid stability while dampening mechanical oscillations.
2Reliability
If individual wind turbines perform independent damping actions to reduce their own mechanical oscillations, then tower vibration damping is improved, but coordination between turbines is lost causing large power oscillations in the wind farm output
Solution Approach 1:
The control system is segmented into two hierarchical levels: individual turbine controllers that handle mechanical oscillation damping, and a farm-level coordinator that manages power oscillation damping. This segmentation allows each level to operate independently within its domain while maintaining overall coordination, resolving the contradiction between independent turbine operation and farm-wide power output coordination.
Solution Approach 2:
The control system is designed with multi-functionality, where the same control infrastructure serves dual purposes: dampening mechanical tower oscillations at the individual turbine level and dampening power oscillations at the wind park level. This universal approach eliminates the need for separate coordination mechanisms while achieving both objectives simultaneously.
3Stability of the object's composition
If wave characteristic information and operational state information are used to control damping power, then power output oscillations are reduced, but system complexity increases
Solution Approach 1:
The control system utilizes readily available operational data from the wind turbines themselves (power output, operational state) to automatically adjust damping parameters. By leveraging existing sensor networks and control infrastructure, the system achieves power output stabilization without requiring additional complex measurement or control hardware, thus minimizing the increase in system complexity.
Data Source
AI summary
A method of controlling plural offshore wind turbines regarding a mechanical oscillation damping action is provided, the method including: obtaining wave characteristic information indicating a characteristic of at least one sea wave; obtaining wind turbine operational state information of the plural wind turbines; obtaining wind characteristic information; controlling the wind turbines regarding the damping action based on the wave characteristic information and/or the wind turbine operational state information of the plural wind turbines and/or the wind characteristic information in particular such that a power oscillation of a total power output of the wind park is reduced.