Siemens SINAMICS PCS - Possible Applications and Limits of the Model; Description of the Default Values, Setting Ranges and Response

Description
2.2 Possible applications and limits of the model
SINAMICS PCS simulation model
12 Operating Instructions, 10/2020, A5E50173895A
2.2 Possible applications and limits of the model
The PGU simulation model addresses the following VDE4110 application scenarios:
• Steady-state response in undisturbed operation
• Shutdown response in the event of an undervoltage condition
• Shutdown response in the event of an overvoltage condition
• Shutdown response in the event of an underfrequency condition
• Shutdown response in the event of an overfrequency condition
• Response for steady-state grid support
– Reactive power specified by the grid operator
– Maximum permissible active power specified by the grid operator
– Controlled reduction of the active power fed back for an overfrequency condition
• Dynamic grid support for 3-phase (symmetrical) grid voltage dips
• Dynamic grid support for 2-phase (asymmetrical) grid voltage dips
The PGU simulation model can be integrated in an electrical network that is simulated using
Simscape. In this network, before the voltage measurement, a line reactor with a uk = 0.05
can be connected at the input of the PGU model.
3 PGU models can be operated in parallel.
2.3 Description of the default values, setting ranges and response
The subsequent key grid and device parameters are used as basis for the simulation model:
Constants
Values
Grid frequency
50 Hz
Rated reactive power of the PGU (under excited)
190 kVAr
Rated reactive power of the PGU (over excited)
280 kVAr
Parameter
Value range
UN: Rated grid voltage (phase-to-phase)
3 AC 250 ... 500 V
IN: Rated current of the PGU
500 ... 1083 A
Derived variables
Calculation
Value range
PN: Rated active power of the PGU
PN = UN × IN × 1.74/1083
217 ... 870 kW
QN Rated reactive power of the PGU
QN = PN × 0.33
72 ... 287 kVAr
QUE: Max. reactive power of the PGU for underexcitation
QUE = QN – 40 kVAr
32 ... 247 kVAr
Q
ÜE
: Max. reactive power of the PGU for overexcitation
Q
ÜE
= Q
N
+ 50 kVAr
122 ... 337 kVAr