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© P. Kundur

WTG -  4

Typical WTG “Power Curve”

Fig below shows typical output versus wind speed characteristics of wind turbines:

The cut-in, rated and cut-out speeds shown are typical for utility-scale WTGs

Generally, WTGs are designed to work at maximum aerodynamic efficiency between cut-in and rated wind speed

For wind speeds higher than rated and lower than cut-out:

blade pitching or blade stalling is used to maintain loading within the equipment’s rating

WTGs shut down for wind speeds higher than cut-out speed to avoid excessive mechanical stress

wind speed (m/s)

cut-in

rated

cut-out

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