US 12,258,941 B2
Wind turbine plant and power control method and device thereof
Zhongpeng Liu, Beijing (CN)
Assigned to XINJIANG GOLDWIND SCIENCE & TECHNOLOGY CO., LTD., Xinjiang (CN)
Appl. No. 18/247,189
Filed by XINJIANG GOLDWIND SCIENCE & TECHNOLOGY CO., LTD., Xinjiang (CN)
PCT Filed Dec. 11, 2020, PCT No. PCT/CN2020/135602
§ 371(c)(1), (2) Date Mar. 29, 2023,
PCT Pub. No. WO2022/068068, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 202011058738.5 (CN), filed on Sep. 30, 2020.
Prior Publication US 2023/0366376 A1, Nov. 16, 2023
Int. Cl. F03D 7/02 (2006.01)
CPC F03D 7/0276 (2013.01) [F03D 7/0284 (2013.01); F05B 2270/101 (2013.01); F05B 2270/1032 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A power control method for a wind turbine plant, wherein the power control method comprises:
controlling rotational speed and torque of a generator of the wind turbine plant based on an optimal rotational speed torque curve and a specific rotational speed torque curve, when receiving a power-limiting operation instruction or a power-releasing operation instruction;
making primary frequency adjustment in response to a primary frequency adjustment instruction, by using the wind turbine plant itself to raise or lower the torque without changing the speed,
wherein, for each point on the optimal rotational speed torque curve, the specific rotational speed torque curve includes a point on an isopower curve starting from said point that satisfies a predetermined condition, and wherein the predetermined condition is that a corresponding power value of said point on the isopower curve is lower than a power value corresponding to a point on the optimal rotational speed torque curve at the same rotational speed value as said point on the isopower curve by a predetermined value.