148 Complementary Areas of Expertise > Wind Power Blade-angle optimization for harnessing wind power Pitch Hubs – Wind Turbine Learning System Electrical and Hydraulic Control of Blade Pitch Angle Housed in the hub that supports the blades, the pitch system is a combination of components that monitor and manipulate blade angles to control rotation speed, as well as the area exposed to the wind. Pitch control is an important element of the overall wind turbine system that improves turbine efficiency by optimizing wind utilization. Pitch systems also stabilize rotational speed for uniform power generation and synchronization with the power grid. They protect the system by preventing turbine overspeed and reducing forces on the rotor during system idle or servicing. Demonstrate realistic pitch adjustment In the Nacelle – Wind Turbine Learning System, the rotor blades turn but cannot be pitched. Instead, the pitch angle is simulated and displayed on the main screen of the HMI. To comprehensively demonstrate the pitch adjustment with wind conditions, a pitch hub can be connected to the Nacelle – Wind Turbine Learning System using a fiber-optic connector. Pitch hubs can also be operated independently. Electrical or hydraulic Two pitch hub learning systems are available: electrical and hydraulic. Both include all components of a typical commercial pitch hub and a representation of the wind turbine blade. The system reacts to simulated wind conditions, corresponding to the typical behavior of a real wind turbine. Each hub addresses blade pitch control and emergency backup systems using the appropriate technologies typical of their respective electrical or hydraulic pitch control systems. The HMI controls and monitors the blade movement and the training system. It runs a SCADA interface that communicates directly with a Siemens PLC inside the electrical panel.
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