Wind Turbine Yaw Drive Load Reduction During Stop Periods
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Solution Overview
Problem
Conventional wind power generation devices experience malfunctions due to changes in load between the pinion gear and the yaw bearing gear during nacelle turning and stop periods, particularly under strong wind conditions like typhoons.
Innovation Solution
A wind turbine drive control device that includes an obtaining unit to monitor the load between drive devices and structures within the wind power generation device, and a control unit to reduce or eliminate the force generated by the drive devices during stop periods based on the obtained load information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive device maintains continuous force generation during stop periods, then the structure remains stable and ready for immediate movement, but excessive load occurs on the drive device and gear components causing malfunctions
Solution Approach 1:
The brake force is dynamically adjusted based on operational state. During stop periods, the brake applies sufficient force to hold the structure stationary and prevent unwanted movement. When movement is required, the brake force is released or reduced, allowing the drive device to move the structure without excessive resistance. This dynamic adjustment resolves the contradiction by making the brake force adaptive rather than static.
Solution Approach 2:
The brake operates in periodic cycles, alternating between applying force during stop periods and releasing force during movement periods. This periodic action allows the system to maintain stability when needed while preventing excessive load accumulation during extended stop periods, thereby resolving the contradiction between reliability and force magnitude.
2Stability of the object's composition
If the brake force is continuously applied during stop periods, then the structure remains fixed and stable, but the load on fasteners and drive devices increases causing potential malfunctions
Solution Approach 1:
The brake force is dynamically controlled to match the actual stability requirements. During normal stop periods, sufficient brake force is applied to maintain structural stability. However, the system can reduce or temporarily release brake force when stability is not critical, thereby reducing the cumulative load on fasteners and preventing malfunctions while maintaining adequate stability when needed.
Solution Approach 2:
The control device monitors the operational state and structural conditions to determine when brake force should be applied or released. This feedback mechanism allows the system to maintain structural stability only when necessary, reducing unnecessary load on fasteners during periods when stability requirements are low, thus resolving the contradiction between stability and fastener durability.
3Productivity
If the drive device operates without load reduction during stop periods, then the system remains ready for immediate operation, but the lifespan of components like yaw drive devices and ring gears decreases
Solution Approach 1:
The brake applies force in advance during stop periods to prevent any unintended movement or drift of the structure. By securing the structure beforehand, the brake eliminates the need for the drive device to maintain continuous corrective force, thereby reducing cumulative load on components and extending their lifespan while maintaining operational readiness when needed.
Solution Approach 2:
The system dynamically switches between brake-dominated operation during stop periods and drive-device-dominated operation during movement periods. This dynamic division of labor allows the structure to remain stable during stops without requiring continuous drive device engagement, thereby extending component lifespan while maintaining productivity when movement is required.
Data Source
AI summary
A wind turbine drive control device according to one aspect of the present invention is a wind turbine drive control device for controlling at least one drive device for moving two structures included in a wind power generation device relative to each other, the wind turbine drive control device including: an obtaining unit for obtaining information related to a load occurring between the at least one drive device and one of the two structures that receives a force generated by the at least one drive device; and a control unit for controlling the at least one drive device so as to cause a force generated by the at least one drive device to be reduced or zero based on the information related to the load obtained by the obtaining unit during a stop period in which the two structures are stopped relative to each other.