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Description
2.2 Possible applications and limits of the model
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
Grid frequency
Rated reactive power of the PGU (under excited)
Rated reactive power of the PGU (over excited)
Parameter
U
: Rated grid voltage (phase-to-phase)
N
I
: Rated current of the PGU
N
Derived variables
P
: Rated active power of the PGU
N
Q
Rated reactive power of the PGU
N
Q
: Max. reactive power of the PGU for underexcitation
UE
Q
: Max. reactive power of the PGU for overexcitation
ÜE
12
Calculation
P
= U
× I
× 1.74/1083
N
N
N
Q
= P
× 0.33
N
N
Q
= Q
– 40 kVAr
UE
N
Q
= Q
+ 50 kVAr
ÜE
N
Operating Instructions, 10/2020, A5E50173895A
Values
50 Hz
190 kVAr
280 kVAr
Value range
3 AC 250 ... 500 V
500 ... 1083 A
Value range
217 ... 870 kW
72 ... 287 kVAr
32 ... 247 kVAr
122 ... 337 kVAr
SINAMICS PCS simulation model
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