ABB ACS 600 MultiDrive, User Manual

Page: 49 / 109

Chapter 6 – Firmware Description
6-16 ACA 635 IGBT Supply Sections
Reactive power control is capable of generating a preset amount of
reactive power (Parameter 24.01 Q POWER REF) to the network
(positive = capacitive, negative = reactive) by changing the flux length.
Increasing the ISU flux length higher than the network flux length,
capacitive power is generated to the network and vice versa. Increased
flux means that the output voltage of the ISU is higher than the network
voltage.
Reactive power control parameters are listed below.
A block diagram of reactive power control is shown below.
Code Parameter Unit Description
2.07 150.02 DC REF INITIALIZ V Nominal DC voltage
150.01 FLUX REF USED
NOM
% Nominal flux reference
2.05 113.05 DC REF Q-CTRL V DC voltage reference from cosfii control
130.02 FLUX SQ REF % Squared flux reference from cosfii control
24.01 123.04 Q POWER REF % Reactive power in percentage of the
nominal power
1.07 161.15 REACTIVE POWER kVAr Calculated reactive power
120.03 QPOW RAMP UP s Ramp up time
120.04 QPOW RAMP DOWN s Ramp down time
130.01 FLUX REF % PI controller output
130.03 FLUX REF LENGTH % Flux reference from cosfii control
X
+
+
PI CONTROLLER
FILTER
-
CALCULATION
150.1
FLUX REF USED NOM
150.1
FLUX REF USED NOM
Antiwindup
123.07 REACT
1.07
REACTIVE POWER
130.02
FLUX SQ REF
150.01
FLUX REF USED NOM
2.07
DC REF INITIALIZ
2.05
DC REF Q-CTRL
CTRL INTEG
123.06 REACT
CTRL GAIN
RAMPING
120.01 QPOW RAMP UP
120.02 QPOW RAMP DOWN
+
24.01
Q POWER REF
FILTER
130.03
FLUX REF LENGTH
130.01
FLUX REF