Integrated control of blade pitch and generator speed for floating wind turbines

• Published in: Ocean engineering Vol. 300; p. 117080
• Main Authors: Ai, Shangmao, Su, Jiayin, Meng, Wei, Yan, Yuning
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.05.2024
• Subjects: Active disturbance rejection control; Blade pitch control; Coupled analysis; Generator speed control loop; Integrated individual and collective pitch control (I-CPC and I-CPC); Generator speed control loop; Blade pitch control; Coupled analysis; Integrated individual and collective pitch control (I-CPC and I-CPC); Active disturbance rejection control
• ISSN: 0029-8018; 1873-5258
• DOI: 10.1016/j.oceaneng.2024.117080

To investigate the coupled effect of a control system between a wind turbine and floating platform, in this paper, a self-designed blade pitch control system is applied for coupled aero-hydrodynamic simulations of a semisubmersible floating wind turbine by using the open-source program OpenFAST. While the motion responses of the floating platform are integrated into the blade pitch control, the generator speed control loop with the active disturbance rejection control algorithm is used to achieve the simultaneous regulation of generator speed and blade pitch angle. The aero-hydrodynamic characteristics of floating wind turbines under different wind fields and different control strategies are discussed. The results show that compared with the traditional baseline control strategy, the proposed integrated individual pitch control (I-IPC) and integrated collective pitch control (I-CPC) strategies not only reduce the load on the blades and tower while increasing the generator power but also improve the surge, roll, and pitch motion responses of the floating platform. The generator speed control loop can be used to effectively regulate generator speed while reducing fluctuations in the aerodynamic torque and output signals. •A generator speed control loop was integrated into the simulation of coupled platform-mooring-nacelle system.•Active disturbance rejection control is applied to regulate blade pitch and reject the external disturbances.•Investigation of the dynamic response by implementing the integrated control strategy.•Study the coupling effect of I-IPC and I-CPC under combined wind-wave excitation.