ABB ACS800-67, System Description And Start-Up Manual

Page: 81 / 120

Practical examples 81
Generator data

Generator rating plate equivalent circuit parameters
The equivalent circuit of the generator is shown below. Note that the equivalent circuit is to
be are derived looking from the stator-side ie, the voltages and currents are reflected on
the stator-side. To calculate the equivalent rotor circuit parameters (resistance and
inductance) from the rotor-side to stator-side, appropriate stator-to-rotor conversion ratio
information should be used.
Since the application measures both rotor- and stator-side quantities, the identification run
method is not used with doubly-fed induction generator control. The control needs to be
given the following data (from the generator data sheet) manually.
Generator data Parameter
Rated stator voltage 99.02 MOTOR NOM VOLTAGE
Rated stator current 99.03 MOTOR NOM CURRENT
Rated stator frequency 99.04 MOTOR NOM FREQ
Rated generator nominal speed
(rotor short-circuited) 99.05 MOTOR NOM SPEED
Note: As generator, positive slip.
Rated generator power 99.06 MOTOR NOM POWER
Note: See the calculations below.
P.F (rotor short-circuited) 99.12 MOTOR NOM COSFII
Generator synchronous speed 99.14 MOTOR SYNC SPEED
R
s
s
I
s
s
U
r
s
(X
s
s
=
s
L
s
s
)
r
s
Ȍ
L
s
s
L
r
s
I
r
s
R
r
s
L
m
s m
s
Ȍ
s
s
Ȍ
U
s
s
-j
r r
s
Ȍ
(X
r
s
=
s
L
r
s
)
j
s s
s
Ȍ
99.21 Rs
99.02 MOTOR
NOM VOLTAGE
99.22 X1S
99.03 MOTOR NOM CURRENT
99.16 MOTOR
NOM IM
99.24 XM
99.23 X2S 99.25 Rr
99.15 MOTOR
OPEN CKT V
Note: Open-circuited voltage when the rotor is
mechanically locked and nominal stator voltage
is connected to the stator circuit.