Method for controlling a ramp rate of a wind park with a plurality of wind turbines and wind park

A method for controlling a ramp rate of a wind park, the wind park having a plurality of wind turbines, the method comprising:

• determining a generating pool that includes wind turbines of the plurality of wind turbines that are online;
• for each wind turbine in the generating pool, determining a first set of quantities that includes at least an average wind speed value at the wind turbine;
• based on the first set of quantities, determining a pre-shutdown pool that includes wind turbines of the generating pool for which the average wind speed value exceeds a first wind speed threshold;
• for each wind turbine in the pre-shutdown pool, determining a power of the wind turbine;
• based on the power of the wind turbines in the pre-shutdown pool, computing a total power of the pre-shutdown pool;
• controlling the wind turbines of the generating pool based on the total power of the pre-shutdown pool;
• controlling the ramp rate of the wind park based on controlling the wind turbines of the generating pool;
• wherein the controlling of the wind turbines of the generating pool is configured to reduce an absolute value of a time derivative of the total power of the pre-shutdown pool below a predetermined upper bound of the absolute value of the time derivative;
• and wherein controlling the wind turbines of the generating pool further comprises:
• determining if the total power of the pre-shutdown pool is above an allowed power drop and, when the total power of the pre-shutdown pool is above the allowed power drop, determining a highest wind speed within the pre-shutdown pool and, based on the total power of the pre-shutdown pool and the highest wind speed within the pre-shutdown pool, determining a shutdown ranking score for each wind turbine in the pre-shutdown pool and determining the turbine in the pre-shutdown pool with the highest shutdown ranking score;
• wherein the allowed power drop is based on the predetermined upper bound of the absolute value of the time derivative;
• and the method further comprising:
• when the total power of the pre-shutdown pool is above the allowed power drop, determining an actual rate of change of power resulting from a shutdown of the wind turbine in the pre-shutdown pool with the highest shutdown ranking score and shutting down the wind turbine in the pre-shutdown pool with the highest shutdown ranking score when the actual rate of change of the power resulting from the shutdown does not exceed an allowed rate of change and when the highest wind speed within the pre-shutdown pool and the total power of the pre-shutdown pool satisfy a shutdown condition;
• wherein the allowed rate of change is based on the predetermined upper bound of the absolute value of the time derivative of the total power generated by the wind park;
• and
• further comprising waiting for a predetermined time delay after shutting down the wind turbine with the highest shutdown ranking score.