The actual power generation of wind turbines is low

How much power does a wind turbine produce?

Wind turbines commonly produce considerably less than rated capacity, which is the maximum amount of power it could produce if it ran all the time. For example, a 1.5-megawatt wind turbine with an efficiency factor of 33 percent may produce only half a megawatt in a year — less if the wind isn't blowing reliably.

Why does a wind turbine not produce power?

Below the cut-in wind speed, the turbine cannot produce power because the wind does not transmit enough energy to overcome the friction in the drivetrain. At the rated output wind speed, the turbine produces its peak power (its rated power). At the cut-out wind speed, the turbine must be stopped to prevent damage.

Why do we need wind turbines?

1. Wind turbines provide us with one of the cleanest forms of energy available today. Wind turbines don’t rely on any fossil fuels to power the spinning of their blades. That means the power we create from this resource doesn’t contribute to the issue of climate change during its energy production cycle.

Do wind turbine load factors decline with age?

By accounting for individual site conditions we confirm that load factors do decline with age, at a similar rate to other rotating machinery. Wind turbines are found to lose 1.6 ± 0.2% of their output per year, with average load factors declining from 28.5% when new to 21% at age 19.

What is the capacity factor of a turbine?

In addition to an operating range, an installed turbine has a capacity factor that reflects its actual power generation. The capacity factor is the annual average of power generated divided by the rated peak power. For example, if a turbine rated at 5 MW produces power at an average of 2 MW, then its capacity factor is 40 percent.

What is the average decline rate of wind turbines?

This decline rate appears stable until 2002, after which it reduces for more recently commissioned turbines. Farms built before 2003 have an average decline rate of −0.49 ± 0.05 points per year, whereas those built afterwards average −0.16 ± 0.08.