Patent ID: 11879433
Assignee: GENERAL ELECTRIC RENOVABLES ESPANA, S.L.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 5:
6. A method for operating a wind turbine, wherein the wind turbine includes a rotor with rotor blades and a power conversion system mechanically connected with the rotor, the power conversion system configured to convert input motive power into electrical output power and electrically connected to a network for feeding the electrical output power to the network, the method comprising:
determining a current frequency (f) of the network;
when the current frequency (f) is equal to or lower than a threshold frequency (fthresh), operating the power conversion system to increase an electrical output power (P) by an output power increase (PI) in accordance with a monotonic function (PI(f)) of the current frequency (f), the monotonic function (PI(f)) being limited to a maximum output power increase value (PImax);
determining the maximum value (PImax) as a function of a rated power of the power conversion system or as a function of the initial electrical output power (P0);
wherein the maximum value (PImax) is in a range from about 5% of the rated power or the initial electrical output power (P0) to about 15% of the rated power or the initial electrical output power (P0); and
wherein the monotonic function (PI(f)) comprises two function values including a response value (PIres) larger than zero.