Siemens SINAMICS S120 System Manual page 98

Commissioning
7.5 Commissioning example of an infeed with dynamic grid support for a power grid
As an alternative to the grid monitoring with threshold values for voltage and frequency
(p5543, p5544) as mentioned above, flexibly adaptable grid protection can be implemented
using characteristics, as shown in the subsequent table.
Parameter settings for voltage-time monitoring and frequency-time monitoring
In the project, right click on "INFEED" under "Infeeds" and then select "Expert list".
Table 7- 11 Parameter settings for "INFEED" drive unit
Parameter Value
p5540.4
1)
p5540.5
1)
p5540.7
1)
p5545[2] e.g. 3000 ms
p5545[3] e.g. 0
1)
p5545[4] e.g. 0
1)
p5550[0] e.g. 120 %
p5550[1] e.g. 80 %
p5551[0]...p5 In accordance with country-
551[9] specific guideline
p5552[0]...p5 In accordance with country-
552[9] specific guideline
p5553[0]...p5 In accordance with country-
553[9] specific guideline
p5554[0]...p5 In accordance with country-
554[9] specific guideline
98
Comment
The voltage-time characteristic (HVRT - high voltage ride through, LVRT -
low voltage ride through) can only be activated when voltage and frequency
monitoring are activated (p5540.0 = 1 signal).
The monitoring thresholds in p5543 are deactivated.
FRT (fault ride through) shutdown delayed
The response after LVRT (low voltage ride through) limit violation depends
on the signal state.
0 signal = immediate shutdown.
1 signal = shutdown only after the time in p5545[2] has expired.
The frequency-time characteristic (HFRT - high frequency ride through,
LFRT - low frequency ride through) can only be activated when voltage and
frequency monitoring are activated (p5540.0 = 1 signal).
The monitoring thresholds in p5544 are deactivated.
FRT LVRT (low voltage ride through) shutdown time
1)
FRT (fault ride through) voltage return wait time
FRT (fault ride through) frequency return wait time
Sets the activation thresholds for HVRT (high voltage ride through) of a grid
1)
fault for FRT (fault ride through) grid monitoring.
The setting is made as a percentage of p0210.
Sets the activation thresholds for LVRT (low voltage ride through) of a grid
1)
fault for FRT (fault ride through) grid monitoring.
The setting is made as a percentage of p0210.
Sets the time values for HVRT (high voltage ride through) voltage character-
istic
1)
If the voltage does not return to the permissible tolerance range (p5550[0,
2]) within the monitoring range (p5551[9]) then the system is shut down with
fault F06851.
Sets the voltage values for HVRT (high voltage ride through) voltage char-
acteristic.
1)
The setting is made as a percentage of p0210.
Sets the time values for LVRT (low voltage ride through) voltage character-
istic.
1)
If the voltage does not return to the permissible tolerance range (p5550[1,
2]) within the monitoring range (p5553[9]) then the system is shut down with
fault F06851.
Sets the voltage values for LVRT (low voltage ride through) voltage charac-
teristic.
1)
The setting is made as a percentage of p0210.
System Manual, 04/2015, A5E03347436A
Grid infeed