Join 60,000+ competitive exam aspirants
or with email
Your Cart
Subtotal₹0
Total₹0
Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
Join 60,000+ competitive exam aspirants
A wind turbine designed too to come into operation at a minimum wind speed is called
Cut in velocity
Windward
Cut out velocity
Upwind location
Cut in velocity
Quick Summary: The 'cut-in speed' is the minimum wind speed at which a wind turbine rotor begins to rotate and generate usable electrical power. Below this threshold, the wind energy is insufficient to overcome the mechanical friction and electromagnetic drag of the generator system.
The 'cut-in speed' is the minimum wind speed at which a wind turbine rotor begins to rotate and generate usable electrical power. Below this threshold, the wind energy is insufficient to overcome the mechanical friction and electromagnetic drag of the generator system.
P=21ρAv3Cp — Power extracted from wind, where v is wind velocity
vcut−in<v<vrated — Operational range for power production
As wind speed increases, the torque produced by the rotor blades eventually exceeds the internal resisting torque of the generator and drivetrain. At the cut-in speed, the turbine controller connects the generator to the electrical grid. Once operational, power output increases with wind speed until reaching the rated capacity of the turbine.
Cut-in speed is typically between 3 m/s and 5 m/s for commercial turbines.
Below cut-in speed, the turbine is usually kept in a 'parked' or 'standby' state to prevent unnecessary wear.
The cut-out speed (typically 25 m/s) is the upper limit where the turbine is shut down to prevent structural damage.
Prevents operating in low-efficiency regimes.
Protects drivetrain components from low-torque instability.
Results in zero power generation during calm periods.
Requires complex control systems for grid synchronization.
Utility-scale wind farms
Off-grid small-scale wind energy systems
The 'Cut-out velocity' refers to the maximum speed beyond which the turbine is braked for safety.
Windward refers to the direction from which the wind blows, not a turbine parameter.
A is correct — The cut-in velocity is the minimum wind speed required to initiate power generation by overcoming the mechanical resistance of the turbine.
Always distinguish between 'cut-in' (startup threshold) and 'cut-out' (safety shutdown threshold) speeds in power generation questions.