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Parameters
Power system →
CT 3-phase:Rated primary current I
Power system →
CT 3-phase:Rated secondary current I
Voltage cont. 2w →
General:Rated voltage V
Voltage cont. 2w →
General:Rated app. power transf. S
Voltage cont. 2w →
General:Rated current I
Target voltage V
For the transformer T
factor = 1, the primary current is as follows:
[fo_ibs_regelabwd_ccm_values, 1, en_US]
•
Check the function values in all voltage controllers according to the following table:
Input values, secon-
dary
I
sec
Phase-to-ground V
Phase-to-phase V
Functional measured values
V
act
I
load
Phase angle
I
load∑
I
CRC
ΔV
act
ΔV
act u
ΔV
act k
Checking the Pickup Value of the Circulating Reactive Current Blocking
If the value of the circulating reactive current exceeds the threshold value Circul. current threshold
for a longer time than the set time delay Circul. current time delay, the indication
current blocking is issued and the voltage control is blocked.
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
rated
rated
target
, with a desired control deviation of 1 % and the parameter Reactive I control
1
Secondary Test
Infeed Transformer T
for D = 1 %
T
1
0.09622 A
-90° ph-gnd
-150° ph-ph
31.754 V
sec
55 V
sec
11.0 kV
144 A
90°
144 A
90 A
1 %
0 %
1 %
10.10 Commissioning Hints for Voltage Control
Transformer T
1500 A
CT-prim
1 A
CT-sec
10.5 kV
26 MVA
rated
1430 A
11 kV
Secondary Test
Infeed Transformer T
1
for D = 1 %
T
T
2
1
0 A
0 A
57.735 V
31.754 V
100 V
55 V
11.0 kV
11.0 kV
0 A
0 A
-
-
144 A
243 A
-90 A
-91 A
-1 %
-1 %
0 %
0 %
-1 %
-1 %
Functional Tests
Transformer T
1
2
3000 A
5 A
10.5 kV
52 MVA
2859 A
11 kV
2
T
2
0.4041 A
-90° ph-gnd
-150° ph-ph
57.735 V
100 V
11.0 kV
243 A
0°
243 A
91 A
1 %
0 %
1 %
Circul.
1087
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