Wound Rotor Induction Generators WRIGS

WRIGs have been constructed for powers per unit up to 4 hundred megawatt (MW) in pump-storage power plants & down to 4.0 MW per unit when used in wind power plants. Diesel engine or gas–turbine-driven WRIGs for stand-by or autonomous operation up to twenty to forty MW may also be useful to reduce fuel consumption & pollution for variable load. Under1.5 to 2 MW/unit, WRIGs are not straightforward to justify in terms of cost per performance and benefits against full the power rating converter synchronous or cage-rotor induction generator systems.

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