ABSTRACT

Induction generators (IGs) are today the most widespread type of electrical machines in renewable electric sources. The equations for the IG voltages are

U R i t

U R i t

U R i

d d

d d

d

= +

= +

= +

Ψ

Ψ

Ψsc dt

(4.1)

and

U R i t

U R i t

U R i

d d

d d

d

= +

= +

= +

Ψ

Ψ

Ψrc dt

.