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This paper researches on: (i) adaptation of the popular 1.5 MW doubly-fed induction generators (DFIGs) used in wind farms for the motor market; (ii) the characteristics of the adapted DFIMs. The paper shows that the DFIM has 4-quadrant operation: positive speed motoring extending to 2 pu, regenerative braking, negative speed motoring and braking at negative speed. In order to exploit existing economic...
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