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© P. Kundur

WTG -  10

Protection System

Rotor current protection:

Limits current in the rotor side converter

If current rises above set value, a crowbar is activated

short-circuits the rotor winding at the slip rings with a static switch

the generator operates as a squirrel cage induction motor

Typically, the case when the voltage at the terminals of the generator decreases rapidly, for example during a fault in the grid

In order to avoid overspeeding of turbine, the speed reference for the pitch control is reduced simultaneously

increases pitch angle and reduces mechanical power

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