Wind Park Ramp-Rate Control During Storm Shutdown and Restart
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Solution Overview
Problem
Existing wind parks face challenges in maintaining grid stability and reliable operation during storm shutdowns and restarts due to rapid changes in power output, necessitating a method to control the ramp rate of wind turbines to keep the absolute value of the time derivative of power below a threshold.
Innovation Solution
A method involving determining wind turbines exceeding a wind speed threshold, computing total power, and controlling the ramp rate by initiating a progressive shutdown or restart based on ranking scores and time delays to limit the power derivative within predetermined bounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wind turbines are shut down rapidly during storm events, then wind turbine safety is improved, but grid stability deteriorates due to excessive power derivative
Solution Approach 1:
The system performs preliminary actions by identifying wind turbines in the pre-shutdown pool before actual shutdown occurs. By computing total power of the pre-shutdown pool and using it to control shutdown sequencing, the system prepares for the storm event in advance, ensuring that turbines are taken offline in a controlled manner that maintains grid stability while still protecting turbines from damage.
2Stability of the object's composition
If the absolute value of the time derivative of power is kept below a threshold, then grid stability is improved, but the responsiveness to storm events deteriorates
Solution Approach 1:
The system dynamically adjusts the shutdown process based on real-time conditions. By continuously monitoring wind speeds, identifying pre-shutdown pools, and controlling the sequencing of turbine shutdowns, the system adapts its response to match the evolving storm conditions. This dynamic approach allows the system to maintain grid stability thresholds while still responding effectively to storm events as they develop.
Data Source
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AI summary
A method 100 for controlling a ramp rate of a wind park with a plurality of wind turbines, the method comprising: - determining 102 a generating pool of the wind park that includes wind turbines of the plurality of wind turbines that are online; - for each wind turbine in the generating pool, measuring and/or determining a first set of quantities of the wind turbine, the first set of quantities including at least an average wind speed value at the wind turbine; - based on the first set of quantities measured and/or determined for each wind turbine in the generating pool, determining a pre-shutdown pool that includes wind turbines of the generating pool for which the average wind speed value at the wind turbine exceeds a first wind speed threshold; - for each wind turbine in the pre-shutdown pool, measuring or determining a power of the wind turbine; - based on the power of the wind turbines in the pre-shutdown pool, computing 104 a total power of the pre-shutdown pool; - controlling the wind turbines of the generating pool of the wind park based on the total power of the pre-shutdown pool; - controlling the ramp rate of the wind park based at least in part on controlling the wind turbines of the generating pool of the wind park; wherein the controlling of the wind turbines of the generating pool is configured to limit and/or reduce the absolute value of the time derivative of the total power generated by the wind park below a predetermined upper bound of the absolute value of the time derivative of the total power generated by the wind park.