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© P. Kundur

WTG -  16

Impact of the Variability of Wind Power Plant Output

Wind power plant output varies with wind resource

Cannot be dispatched like conventional power plants

System operators cannot control the rate of power decreases, i.e., ramp down due to falling wind speeds

For ramping up, some manufacturers provide the option of controlling rate of power increase

As wind power capacity within a control area increases, the variability of wind power can have a significant impact on:

the efficiency of unit commitment process, and

the reserve requirements to meet reliability performance standards

As an example, a study of a system with 35,000 MW peak demand estimated that the regulation reserves would increase by 36 MW when adding 3,300 MW of wind power

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