期刊
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
卷 14, 期 4, 页码 2327-2337出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2023.3296282
关键词
Rotors; Aerodynamics; Wind power generation; Optimization; Wind turbines; Active power control; rotor speed variation; equilibrium point optimization; wind turbine generator
With the increasing use of wind power in power systems, it is important for wind turbine generators to have active power control capabilities. This paper proposes an active power control method with additional pitch angle compensation, which can optimize and set stable equilibrium points and effectively reduce speed overshoot and power drops.
With the deepening penetration of wind generation in power systems, it is urgent that wind turbine generators (WTG) can have active power control (APC) capabilities, i.e., WTG can adjust active power output according to the power command from wind farms. The improvement of APC performance is closely related to the rotor speed variation (RSV) mode and the optimal setting of stable equilibrium points (SEP). Compared with the active RSV with the same SEP, the passive RSV no longer focuses on the rotor speed tracking and has lower power response discrepancy and drive-train loads. However, limited by the realization principle, APC based on passive RSV overlooks the optimization and setting of SEP, which makes the rotor speed of WTG easily reach the bound of the variable-speed range and leads to speed overshoot and power drops. Hence, this paper proposes an APC method with additional pitch angle compensation. Consequently, WTG under passive RSV has the ability of optimizing and setting SEP. On this basis, the compensation pitch angle is dynamically optimized according to the predicted wind speed. The experimental results show that the proposed strategy can effectively reduce speed overshoot and power drops while taking full advantages of passive RSV.
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