公开(公告)号：US11549489B2

公开(公告)日：2023-01-10

申请号：US17334260

申请日：2021-05-28

Applicant: Anhui University of Science and Technology

Inventor： Liang Li ,  Laiwang Jing ,  Jianqiang Wu ,  Long Wang ,  Guanghong Miao

IPC: F03D7/06 ,  F03D3/00

Abstract: A pitch control method and system of a symmetrical-airfoil vertical axis wind turbine collects data by an anemometer, an anemoscope and an angle sensor, outputs an optimum pitch angle based on a control law of a pitch angle and controls the pitch angle to be the optimum pitch angle through a pitch control actuator. In addition to input variables of the control law such as a wind velocity vin and a blade azimuth angle Ψ, constants such as a rotation radius R, a rotation velocity Ω of the blade and aerodynamic coefficients c1, c2 and c3 are also related. A Reynolds number has little influence on three aerodynamic coefficients c1, c2 and c3. The pitch actuator controls the adjustment rods to realize the automatic pitch control of the blades. An expression of the control law of the pitch is concise, the calculation time is short, and a response speed is fast.