Parameters Transformer T
1
Transformer T
2
Power system →
CT 3-phase:Rated primary current I
CT-prim
1500 A 3000 A
Power system →
CT 3-phase:Rated secondary current I
CT-sec
1 A 5 A
Voltage cont. 2w →
General:Rated voltage V
rated
10.5 kV 10.5 kV
Voltage cont. 2w →
General:Rated app. power transf. S
rated
26 MVA 52 MVA
Voltage cont. 2w →
General:Rated current I
rated
1430 A 2859 A
Target voltage V
target
11 kV 11 kV
For the transformer T
1
, with a desired control deviation of 1 % and the parameter Reactive I control
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:
Secondary Test
Infeed Transformer T
1
for D = 1 %
Secondary Test
Infeed Transformer T
2
for D = 1 %
Input values, secon-
dary
T
1
T
2
T
1
T
2
I
sec
0.09622 A
-90° ph-gnd
-150° ph-ph
0 A 0 A 0.4041 A
-90° ph-gnd
-150° ph-ph
Phase-to-ground V
sec
31.754 V 57.735 V 31.754 V 57.735 V
Phase-to-phase V
sec
55 V 100 V 55 V 100 V
Functional measured values
V
act
11.0 kV 11.0 kV 11.0 kV 11.0 kV
I
load
144 A 0 A 0 A 243 A
Phase angle 90° - - 0°
I
load∑
144 A 144 A 243 A 243 A
I
CRC
90 A -90 A -91 A 91 A
ΔV
act
1 % -1 % -1 % 1 %
ΔV
act u
0 % 0 % 0 % 0 %
ΔV
act k
1 % -1 % -1 % 1 %
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
Circul.
current blocking
is issued and the voltage control is blocked.
Functional Tests
10.10 Commissioning Hints for Voltage Control
SIPROTEC 5, High-Voltage Bay Controller, Manual 1087
C53000-G5040-C015-9, Edition 11.2017
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