Wind Turbine Output Control During Grid Frequency Limiting
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Solution Overview
Problem
Wind turbine disconnection during output-power limiting operations can lead to reduced electric power supply to the utility grid, and increasing output power to prevent disconnection may destabilize the grid frequency.
Innovation Solution
A wind-power generation system with multiple wind turbines connected through a common interconnection point, where the central control unit forecasts wind conditions and adjusts the output power of operational wind turbines to compensate for disconnected turbines, ensuring stable grid supply by increasing output power from remaining turbines during output-power limiting operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If rotational speed is increased during output-power limiting operation, then output power control is improved, but wind turbine safety deteriorates due to overspeeding
Solution Approach 1:
The control device detects wind speed increases before they lead to overspeeding conditions and preemptively adjusts the output power of other wind turbines. This preliminary action prevents the hazardous overspeeding condition from developing while maintaining effective output power control through coordinated management of the wind farm's total power generation.
Data Source
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AI summary
An object is to reduce a decrease in the amount of electric power supplied due to the occurrence of a gust of wind during an output-power limiting operation. Provided is a wind-power generation system in which, in the case where an output-power limiting operation for decreasing the grid frequency is performed, when at least one wind turbine is disconnected depending on the wind conditions, the output power of the other wind turbines in operation is increased.