V
SetComp
Target voltage at the end of the line
V
Set
Target voltage
I
load
Load current in %
With the following equation, you can determine the percentage of the primary load current of the line from
the rated current of the transformer k (k = 1, 2, …, 8).
[fo_ibs_load_cur_perc, 1, en_US]
where:
I
load
Primary load current
I
rated
Rated current of the transformer
Example
Application example of the LDC-Z line compensation for the voltage control of 2 transformers connected in
parallel.
[dw_target_voltage_2exam, 1, en_US]
Figure 6-160 LDC-Z Line Compensation of 2 Parallel Transformers
In the example, a load current of I
load
= 1430 A results in a voltage drop of V
load
= 500 V.
Value
Transformer T
1
Transformer T
2
I
load
(%) 100 % 50 %
Target voltage rising ΔV
load
(%) 4.8 % 9.6 %
Control Functions
6.9 Voltage Controller
496 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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