A redundant electrical braking system for wind turbine generators

Wang, T.C.Y.; Wenqiang, Yang; Yuan, Xiaoming; Teichmann, R.

doi:10.1109/epe.2007.4417293

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…To achieve this goal, researchers in [9] developed a hydraulic brake for a 100 kW HAWT with a braking torque of 1.49 kNm. They estimated that under real conditions, the rotor will stop in 1.1 s. Researchers in [10] devised a dynamic braking system with a controllable resistive load connected to the generator and activated using active power control and a switch, preventing the system from coasting. In [11], the authors gently reduced the rotational speed of the HAWT using a Y-circuit with negative temperature coefficient thermistors connected directly to the generator terminals.…”

Section: Braking Systemsmentioning

confidence: 99%

Development of Active Wind Vane for Low-Power Wind Turbines

González Domínguez,

Lastres Danguillecourt,

Verde Añorve

et al. 2024

Energies

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This paper proposes the development of an active control system to control the power output of a low-power horizontal-axis wind turbine (HAWT) when operating at wind speeds above the rated wind speed. The system is composed of an active articulated vane (AAV) in charge of the orientation of the wind turbine, which is driven by an electric actuator that changes the angle of the AAV to maintain a constant power output. Compared with the passive power regulation systems most often used in low-power HAWTs, active systems allow for better control and, therefore, greater stability of the delivered power, which reduces the structural stresses and allows for controlled braking in any wind condition or during system failures. The control system was designed and simulated using MATLAB R2022b software, and then built and evaluated under laboratory conditions. For the control design, the transfer function (TF) between the pulse width modulation (PWM) and the AAV angle (θ) was determined via laboratory tests using MATLAB’s PIDTurner tool. For the simulation, the relationship between the power output and the AAV angle was determined using the vector decomposition of the wind speed and wind rotor area. Wind speed step and ramp response tests were performed for proportional–integral–derivative (PID) control. The results obtained demonstrate the technical feasibility of this type of control, obtaining settling times (ts) of 6.7 s in the step response and 2.8 s in the ramp response.

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Section: Braking Systemsmentioning

confidence: 99%