Wind Turbine Gearbox Life Extension via Energy Storage Buffering
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Solution Overview
Problem
Wind turbines experience torque imbalances due to wind gusts and grid fluctuations, leading to mechanical stress and reduced gearbox lifetime, which is exacerbated by the remote locations of many wind farms, making maintenance difficult and costly.
Innovation Solution
A wind park control system that includes environmental sensors, power sensors, and a controller to determine a gearbox or drive train health metric, allowing for the use of an Energy Storage System to stabilize power imbalances and distribute load more evenly across wind turbines, thereby reducing wear and tear on mechanical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wind turbines operate continuously to maximize power generation, then productivity increases, but torque imbalances from wind gusts and grid fluctuations cause cumulative mechanical stress that reduces gearbox lifetime
Solution Approach 1:
The patent introduces an energy storage system as an intermediary component between the wind turbine generator and the grid. This mediator absorbs torque imbalances and power fluctuations, preventing them from being transmitted to the gearbox. The energy storage system acts as a buffer that decouples the mechanical stress from the continuous operation, allowing the wind turbine to maintain high productivity while protecting the gearbox from cumulative stress damage.
2Productivity
If wind turbines are located in remote areas to access favourable wind conditions, then power generation efficiency improves, but maintenance difficulty and cost increase
Solution Approach 1:
The patent applies the principle of using replaceable, relatively simple energy storage modules that can be easily swapped out. Rather than requiring complex, expensive maintenance of the entire wind turbine system in remote locations, the energy storage system uses standardized, modular components that can be quickly replaced. This reduces maintenance complexity and makes remote operation more feasible, as critical components can be exchanged without requiring extensive on-site technical intervention.
3Duration of action of stationary object
If energy storage system is introduced to mitigate torque imbalance, then gearbox lifetime extends, but device complexity increases
Solution Approach 1:
The energy storage system is designed to perform multiple functions simultaneously: it mitigates torque imbalances to protect the gearbox, stabilizes grid connection, and can provide additional power during peak demand. By consolidating these multiple protective and operational functions into a single integrated system, the patent avoids the need for multiple separate complex devices. The multi-functionality approach reduces overall system complexity while achieving comprehensive protection for the gearbox and improved reliability.
Data Source
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AI summary
A wind park controller and control method for a wind park (10) are described. The wind park comprises a plurality of wind turbines (20) and an Energy Storage System (24) connected to one another by means of a low voltage power network (22, 25), which is in turn coupled to the grid. The controller determines a number of operating parameters of the wind turbine gearbox or drive train, and calculates a gearbox or drive train health metric. This can include a measure of the gearbox lifetime. The controller also determines one or more power characteristics of the wind turbine generator or the point of common coupling (26) to determine a power mismatch indication. Based on the power mismatch indication and said gearbox or drive train health metric, the controller determines a power command for the Energy Storage System and wind turbines based to improve the gearbox health and lifetime.