ECT468 RENEWABLE ENERGY SYSTEMS

DINU A G

AP IN ECE

Module 3

• Wind turbine, components of wind turbine, basic working of wind turbine, classification turbine ( HAWT & VAWT) and other classification based on power, rotation speed, utilization etc.
• Rotor: Darrieus & Savonious rotor, enervation of rotors
• Blades, its design and materials: polymers, epoxy, carbon nanotubes.

Wind electric system

Difference between HAWT & VAWT

• Pitch control
• Yaw control
• Fixed speed with capacitor bank
• Rotor resistance control

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Speed control used in wind power energy

Pitch Control

• Angle of pitch in blade can control
• Maintain blade angle to certain speed
• Blade will tilt theta angle according to wind
• Vertical axis wind turbine

Yaw Control

• Yaw refers to the rotation of entire wind turbine in the horizontal axis of wind turbine
• Mainly done on VAWT

Stopping Braking

• If the blade speed is very high, it must stop by using braking system by mechanical means.

Wind Turbine

Wind Turbine components

• Rotor: generates aerodynamic torque from the wind.
• Nacelle: converts the torque into electrical power
• Tower: holds nacelle and rotor blades up in the wind and provides access to the nacelle
• Foundation: ensures that the turbine stays upright

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Rotor: contains blades, hub, spinner and pitch bearing system

Gear box: low speed to high speed

High speed shaft there is brake for controlling over speed

Sources of wind energy

• Wind energy is an indirect form of energy
• It may be considered as an alternative to conventional sources with cost effective

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Wind turbine or Wind mill

Wind turbines are machine that generate electrical energy from KE of wind

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