The outputs from the above configured SMAI block shall only be used
for Overfrequency protection (SAPTOF), Underfrequency protection
(SAPTUF) and Rate-of-change frequency protection (SAPFRC) due
to that all other information except frequency and positive sequence
voltage might be wrongly calculated.
The same phase-phase voltage connection principle shall be used for frequency
tracking master SMAI block in pump-storage power plant applications when
swapping of positive and negative sequence voltages happens during generator/motor
mode of operation.
20.16
Global base values GBASVAL
20.16.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Global base values
GBASVAL
-
-
20.16.2
Functionality
Global base values function (GBASVAL) is used to provide global values, common
for all applicable functions within the IED. One set of global values consists of values
for current, voltage and apparent power and it is possible to have twelve different sets.
This is an advantage since all applicable functions in the IED use a single source of
base values. This facilitates consistency throughout the IED and also facilitates a
single point for updating values when necessary.
Each applicable function in the IED has a parameter,
GlobalBaseSel
, defining one out
of the twelve sets of GBASVAL functions.
20.16.3
Settings
Table 867:
GBASVAL Non group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
UBase
0.05 - 2000.00
kV
0.05
400.00
Global base voltage
IBase
1 - 99999
A
1
3000
Global base current
SBase
1.00 - 200000.00
MVA
0.05
2000.00
Global base apparent power
Section 20
1MRK502052-UEN B
Basic IED functions
1134
Technical manual
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