General Information - Siemens SINAMICS S120 System Manual

7.4 Commissioning example for an infeed with voltage and frequency control for an island grid.
7.4.2

General information

Commissioning procedure
The following procedure is used to commission an Active Line Module for an island grid
offline.
The Active Line Module should participate in the frequency and voltage control of the island
grid.
In this case, a generator is used as an example to generate the power.
1. Create project.
2. Create drive units.
The drive unit for feeding into the grid is called INFEED.
The drive unit to control a Motor Module is called MOTORINVERTER.
3. Activating the function modules on the MOTORINVERTER drive device:
– Activate the "Technology controller" function module;, when required, also the
– Select the control mode "n/M control + U/f control, I/f control".
4. Activate the function modules on the INFEED drive device (see Chapter Function
modules for creating a line infeed in an island grid (Page 72)).
5. Create additional VSM10 for measuring the grid voltage on the primary side of the grid
transformer (No. 8).
6. If required, create an additional VSM10 to measure the power grid voltage for the
"Synchronize island grid to an external grid" function.
Also refer to Synchronizing an island grid to an external power grid (Page 114).
7. Adapt the topology and the VSM10 assignments.
8. Perform additional parameter settings in the expert list.
To do this, the sequence of the individual sequential steps for identification and setting of the
transformer data must be taken into consideration (see Commissioning grid-friendly
transformer magnetization (Page 102)).
For weak networks (large inductance and low short-circuit power), additional recommended
settings apply (see Notes for commissioning systems for operation on grids with low short-
circuit power (fault level) and variable grid parameters (Page 138)).
Note
Description of the commissioning process
The basic steps when commissioning a SINAMICS S120 are contained in the
Commissioning Manual.
Note
Access level
Some of the parameters to be set are accessible only under access level 4 (Service). This
access level is protected by password. Only authorized persons will receive the required
password within the scope of expert training provided by Siemens.
Grid infeed
System Manual, 04/2015, A5E03347436A
"Extended messages/monitoring functions" function module.
Commissioning
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