Checking The Relative Line Short-Circuit Power Rsc Of An Existing Line Connection - Siemens SINAMICS S120 Engineering Manual

1 Engineering SINAMICS S120 Booksize
1.3.5

Checking the relative line short-circuit power RSC of an existing line connection

1.3.5.1 Overview of a typical line supply topology
Fig. 1-8
Medium-voltage
Medium-voltage
power grid
line supply
1.3.5.2 Required data
Medium-voltage power grid:
- Voltage of the medium-voltage line supply
U
MV line
- Line frequency
f
- Short-circuit power of the power grid
S''
k_line
In Germany, the short-circuit powers in medium-voltage line supplies are generally between 20 and 500 MVA - and typically between
50 and 200 MVA.
Engineering manual S120 Booksize
Entry-ID: 109808992, V1.0, 04/2022
© Siemens AG 2022 All rights reserved
Line transformer Low-voltage line
= 20.0 kV
50
= Hz
= 20.00000 MVA
=
~
Converter
supply
20