ABB UNITROL 1020 - Page 98

Chapter 5 - Commissioning 
90 3BHS335648 E82 UNITROL 1020 User Manual
5.3.1.14 Setup \ Diode Monitoring
The Nominal Exciter Frequency has to be adjusted. For the others, the default value has to
be kept.
f
exc
= P
exc
x f
gen
/ P
gen
f
exc
Nominal Exciter frequency
P
exc
Number of pole pairs in exciter machine
f
gen
Nominal Generator frequency
P
gen
Number of pole pairs in generator
5.3.1.15 Setup \ PSS
ABB offers PSS parameter calculation and stability studies, contact us for further
questions.
For more information refer to following documents:
 UNITROL 1020 Power System Stabilizer (PSS) Engineering Notes
Doc. No. 3BHS351450 E01
 Simplified Computer Representation for Power System Stability Studies
UNITROL 1020 and UNITROL 1010
Doc. No. 3BHS354059 E01
See manufacturer’s details, Chapter 1.5 - Manufacturer’s Address.
5.3.1.16 Setup \ Double Channel
The configuration of Double Channel depends on the application and connections. For
detailed information about configuration, refer to 3.4.4.4 Double Channel (DCH).
5.3.1.17 Tune \ Setpoint Adjust, Step
Mode
Maximum adjustable setpoint jump during 10 s
Manual
±50%
Open Loop
±20%
PF
±0.2
Var
±50%
Auto
±20%
5.3.1.18 Tune, Order of Priorities
If several operating modes are selected simultaneously by the digital inputs, the following
order of priority applies:
Priority
Mode
Remark
1. resp. top
Standby
2.
Sync
3.
Manual
4.
Open Loop
5.
VDC
Only active, if Gen CB Closed status is active and