US 12,231,074 B2
Control method and control apparatus for voltage source-type wind turbine
Zhiqian Yang, Beijing (CN); Xiao Yu, Beijing (CN); Rui Guo, Beijing (CN); and Mingjie Tang, Beijing (CN)
Assigned to BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 18/294,284
Filed by BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Dec. 8, 2021, PCT No. PCT/CN2021/136329
§ 371(c)(1), (2) Date Feb. 1, 2024,
PCT Pub. No. WO2023/019817, PCT Pub. Date Feb. 23, 2023.
Claims priority of application No. 202110961460.0 (CN), filed on Aug. 20, 2021.
Prior Publication US 2024/0429841 A1, Dec. 26, 2024
Int. Cl. H02P 9/02 (2006.01); H02P 9/04 (2006.01)
CPC H02P 9/02 (2013.01) [H02P 9/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for controlling a voltage source type wind turbine, comprising:
obtaining an active power deviation through a proportional integral differential operation on a deviation between a measured DC bus voltage and a reference DC bus voltage of the wind turbine;
determining a virtual angular frequency deviation based on the active power deviation;
determining a virtual inner potential phase based on the virtual angular frequency deviation;
inputting a grid-connected current in a dq coordinate system into a virtual impedance module, to obtain a d-axis virtual impedance output and a q-axis virtual impedance output;
determining a d-axis component of a modulated voltage and a q-axis component of the modulated voltage, based on the virtual angular frequency deviation, a reactive power setpoint and a measured reactive power of the wind turbine, a rated voltage amplitude of a grid, the d-axis virtual impedance output and the q-axis virtual impedance output; and
controlling an injection voltage at a point of common coupling of the wind turbine, based on the virtual inner potential phase, the d-axis component of the modulated voltage, and the q-axis component of the modulated voltage.