Siemens 6MD86 - Page 1085

[fo_ibs_load_cur_perc, 1, en_US]
[fo_ibs_prim_load_voltage, 1, en_US]
The following calculation values result from the Example, Page 496, which is shown in the setting notes in the
chapter Z Compensation.
Parameters Transformer T
1
Transformer T
2
Power system →
VT 3-phase:Rated primary voltage V
CT-prim
11 kV 11 kV
Power system →
VT 3-phase:Rated secondary voltage V
CT-sec
110 V 100 V
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
Target voltage rising 4.8% 9.6%
•
Based on the following table check the input currents and voltages for each voltage controller:
Transformer T
1
Independent
T
2
= off
(I
2
= 0)
Transformer T
2
Independent
T
1
= off
(I
1
= 0)
Transformer T
1
Master
Transformer T
2
Follower
Input values, secondary
I
sec
0.953 A 2.383 A 0.635 A 3.1833 A
Phase-to-ground V
sec
33.198 V 60.359 V 34.641 V 62.984 V
Phase-to-phase V
sec
57.501 V 104.54 V 60 V 109.1 V
Functional measured values
V
act
11.5 kV 11.5 kV 12.0 kV 12.0 kV
I
load
1430 A 1430 A 953 A 1910 A
I
load∑
- - 2860 A 2860 A
ΔV
actual
0 % 0 % 0 % 0 %
V
target
11.5 kV 11.5 kV 12.0 kV 12.0 kV
You can find more information in chapter 6.9.4.4 Line Compensation.
Functional Tests
10.10 Commissioning Hints for Voltage Control
SIPROTEC 5, High-Voltage Bay Controller, Manual 1085
C53000-G5040-C015-9, Edition 11.2017