| CPC F03D 7/028 (2013.01) [F03D 7/0224 (2013.01); H02P 9/02 (2013.01); F05B 2270/1033 (2013.01)] | 20 Claims |
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1. A wind turbine and energy storage combined frequency regulation method, comprising:
in response to detecting a change in a grid frequency, determining a power increment required to be provided by a wind turbine and energy storage combined system, wherein the wind turbine and energy storage combined system comprises a wind turbine and an energy storage device connected to the wind turbine;
determining whether a rotor of the wind turbine is controllable;
in response to determining that the rotor of the wind turbine is controllable, controlling the rotor of the wind turbine through a first mixed feedforward and feedback control manner based on the determined power increment, to generate a first power increment, at least by:
calculating a first control component based on the determined power increment, a real-time grid-connected power value of the wind turbine, and a grid-connected power value when determining the power increment required to be provided by the wind turbine and energy storage combined system;
calculating a sum of a first feedforward amount and the first control component as a rotor control target, wherein the determined power increment is used as the first feedforward amount; and
controlling the rotor of the wind turbine based on the calculated rotor control target to generate the first power increment; and
while controlling the rotor of the wind turbine, controlling the energy storage device or both the energy storage device and a pitch system of the wind turbine based on the determined power increment, to generate a second power increment.
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