4
vacon • 18
CHOOSING A CORRECT TOPOLOGY
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4.1
Allowed topology configurations
In the following table, example of allowed and not allowed configurations are given.
These configurations are valid for both with DC/DC converter or with a direct battery connection into
the DC-link. Options shown below are DC/DC configurations A), B) and C) and Direct to DC
connection D). Note that the storage topology does not affect the allowed or not allowed topology of
the connection to the system. There might however be other limitations, for example voltage or
current ratings.
Figure 17. Options A, B, C, D
Table 4.
OK?
Configuration
Notes
No grounding
allowed in
transformer
No HF/EMC
capacitors in LCL
OK
OK, transformer has
enough inductance
to satisfy filtering
demand of grid
converter:
L
transformer
~
L
grid side choke
HF
HF
HF
HF
HF
HF
HF
HF
A
B
C
D
3
3
Options
A, B, C, D
3
3
HF
Options
A, B, C, D
3
3
Options
A, B, C, D
3
3
Options
A, B, C, D
Summary of Contents for NX6
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