Wind Turbine Priority Control for Grid Power Limit Compliance
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Solution Overview
Problem
Existing wind turbine generator systems face output power reductions exceeding grid demands when wind speed drops, leading to unnecessary power reduction in the entire system.
Innovation Solution
Implementing a priority-based output power reduction method where wind turbines with higher output powers are given priority, and set to a minimum operational output power value that is not affected by wind speed changes, ensuring continuous operation while meeting grid demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If output power commands are set by proportionally dividing output power reduction among wind turbines, then the grid output power limit can be met, but when wind speed drops, the actual output power of each wind turbine becomes smaller than commanded, causing excessive overall power reduction
Solution Approach 1:
The patent changes the control parameter from proportional power reduction to priority-based minimum power setting. By setting different minimum output power values for different wind turbines based on their operational characteristics and wind speed conditions, the system ensures that turbines operating in stable wind conditions maintain their output, preventing excessive power reduction when wind speed fluctuates.
2Adaptability or versatility
If output power reduction is applied uniformly to all wind turbines, then the grid demand can be satisfied, but the system loses adaptability to individual turbine conditions and wind speed variations
Solution Approach 1:
The patent applies local quality by setting different minimum output power values for different wind turbines based on their individual characteristics and local wind conditions. Each turbine is evaluated independently, and the control strategy is customized for each turbine rather than applying a uniform reduction across all turbines, thereby improving adaptability to local conditions.
3Productivity
If wind turbines operate at minimum output power to meet grid limits, then power reduction demands are satisfied, but system productivity decreases due to unnecessary power curtailment
Solution Approach 1:
The patent performs preliminary action by predicting future wind speed changes and proactively adjusting output power commands before actual wind speed drops occur. This allows the system to maintain higher output power during stable conditions while being prepared to reduce power only when necessary, thereby maximizing productivity while ensuring compliance with grid power limits.
Data Source
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AI summary
An object is to suppress an output power reduction of a wind turbine generator system caused by a drop in the wind speed while the output power is being reduced according to an output-power reduction demand. When the output-power reduction demand to reduce the output power at an interconnection point to a predetermined output-power limit value is notified from a utility grid side, priorities are set such that higher priorities are given to wind turbines whose output powers are larger, and a preset minimum output-power value is set in output power commands for the wind turbines sequentially in descending order of priority, until the output power at the interconnection point reaches the output power limit value.