Siemens SINAMICS PCS - Page 19

Implementation
4.3 Model structure
SINAMICS PCS simulation model
Operating Instructions, 10/2020, A5E50173895A
17
Table 4- 1 Description of the interfaces of the model block of the power generating unit in Simulink
No. Name Input/
output
Description Value range
1
V_rated
Input
Rated grid voltage in V
The characteristics for the dynamic grid support, as well as the
threshold values for the undervoltage and overvoltage trip are
referred to this value.
250 … 500
2
I_rated
Input
Rated current of the PGU in A
The characteristics for the dynamic grid support are referred to
this value.
500 … 1083
3
On/Off
Input
The power generating unit is switched-on or switched-off at this
input.
• 0 switches off the power generating unit
• ≠0 switches on the power generating unit
The switch-on operation is used to transition into steady-state
operation. The various switch-on types for SINAMICS PCS are not
emulated here.
0 … 1
4
P_ref_PLC
Input
Percentage limiting of the active power that is fed back
The rated active power PN of the power generating unit is used
as basis.
0 … 1
5
Q_ref_EVU
Input
Percentage setpoint for the reactive power that is fed back.
The rated reactive power QN of the power generating unit is
used as basis.
-1 … 1
6
k_FRT
Input
The k factor for the reactive current droop in the case of an FRT
is set at this input.
0 … 10
7
LGSM
(limited grid
support mode)
Input
The limited grid support mode (= limited dynamic grid support)
is activated at this input.
• 0: the limited grid support mode is not activated
• ≠0: the limited grid support mode is activated
> 0
8
P(f) gradient
Input
The gradient of active power adjustment P(f) for overfrequency
and underfrequency is set at this input.
The value is referred to the rated power of EZE and indicates by
which factor the active power is decreased or increased at an
overfrequency or underfrequency of 1 Hz.
0.4 … 1.0