Siemens SINAMICS S120 System Manual page 97

Parameter settings for grid monitoring
In the project, right click on "INFEED" under "Infeeds" and then select "Expert list".
Table 7- 10 Parameter settings for "INFEED" drive unit
Parameter Value
p5540.0 1
p5540.1 e.g. 0
p5541 1
p5543 In accordance with country-
specific guideline
p5544 In accordance with country-
specific guideline
p5545[0] In accordance with country-
specific grid codes: Permis-
sible duration of a 100%
voltage dip
p5547[0] e.g. 0.1 Hz
p5548[0] e.g. 0.1
Parameter assignment for monitoring for grid synchronization
p5540.9 e.g. 1
1)
p5545[7] e.g. 60000 ms
Values are system-specific and must be taken into special consideration when adapting to the particular system configu-
1)
ration.
Grid infeed
System Manual, 04/2015, A5E03347436A
7.5 Commissioning example of an infeed with dynamic grid support for a power grid
Comment
Grid monitoring configuration, voltage and frequency monitoring.
As a result of the fault ride through function, when dynamic support is acti-
vated, the Active Line Module only shuts down (trips) to protect itself. Grid
protection (shutdown involving frequency or voltage faults) must be sepa-
rately activated. Alternative to monitoring with p5540.0, this can also be
realized using flexible characteristics (p5540.4, refer above) or externally,
using a separate control system.
Grid monitoring configuration, activating the AISL (anti islanding) frequency
shift technique.
The frequency shift technique actively changes the injected frequency.
When an island grid is created, this causes the permissible frequency band
to be violated. A shutdown is realized as a result of fault F06851.
Anti-islanding should only be activated if it is actually required!
BI: Grid monitoring activation
The parameter for the terminal for activating the dynamic grid support must
be entered.
Grid monitoring voltage threshold
1)
Grid monitoring frequency threshold
1)
Voltage and frequency monitoring, minimum shutdown time
AISL (anti islanding) frequency shift excitation frequency
For frequency changes below the set excitation frequency, a normal grid
frequency change is assumed. For frequency changes above the set excita-
tion frequency, the algorithm for island grid detection is activated.
Sets the gains for the grid monitoring
Sets the gain for the frequency deviation for the frequency shift technique.
Grid synchronization voltage/frequency check
Activates the additional voltage and frequency check when switching on. To
do this, before the operating enable, a check is made against limits p5543[2,
3] and p5544[2, 3] and the system waits until these limits are complied with.
If voltage and frequency limits are exceeded, then this is indicated in r5542.
Grid synchronization restart check duration
1)
Duration of the frequency and voltage check (p5543, p5544) of the grid for
automatic restart (p1207 and following).
Commissioning
97