
Standalone Double-Fed Induction Generator 23-11
e angular displacement requires adequate movement of the rotor current vector i
r
, and it is obtained
b
y
t
he
c
hange
o
f
t
he
r
eference
a
ngular
s
peed
of the rotor current vector i
r
. Rotor current angular
s
peed
is changed by the PI type, Rα regulator, then the speed is integrated to obtain reference
a
bsolute
p
osition
of the rotor current vector i
r
. erefore, simultaneously adequate frequency and
p
hase
o
f
t
he
r
otor
c
urrent
i
s
d
etermined.
R
eference
a
mplitude
and phase
of the rotor current
v
ector
i
r
in the polar frame A can be used for transformation to other coordinate system ...