Area Of Application - Siemens SINAMICS DCM Compact User Manual

Area of application

This application document provides support for SINAMICS DCM converters in 12-pulse
applications.
In order to make sense of this application document, it is assumed that the reader has read
the contents of the SINAMICS DCM operating instructions.
The following converter topologies are covered:
● 12-pulse parallel operation
This mode of operation is especially used at higher power ratings to achieve lower line
harmonics. In addition, by using this circuit, a lower DC current ripple is obtained when
compared to a 6-pulse connection.
● 12-pulse series operation
This mode of operation is ideal when converting from older systems to digital control
(using a SINAMICS DC MASTER Control Module) while keeping the existing power unit
and consequently the nominal system data.
The following subjects are covered:
● Configuration of the required components
● Commissioning
● Switchover of the power unit topology - option S50
Note
Based on the engineering and commissioning examples described here, redundant
operation is not possible.
12-pulse applications
Compact User Manual, 09/2015, A5E34871844H
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