Siemens SINAMICS PCS, Руководство по эксплуатации

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Implementation
4.4 Deleting simulation models from projects
SINAMICS PCS simulation model
Operating Instructions, 10/2020, A5E50173895A
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1 Contains the protected model of the 1st PGU
2 Contains the protected model of the 2nd PGU
3 Contains the protected model of the 3rd PGU
4 Generation of the grid phase voltages
5 Power supply grid in Simscape
6 Measurement of the phase voltages and provision as input variable for the PGU model
7 Injection of the phase currents of the 1st PGU in the power supply grid
8 Injection of the phase currents of the 2nd PGU in the power supply grid
9 Injection of the phase currents of the 3rd PGU in the power supply grid
10 Value specified by the grid operator and parameters to set the response of the PGU when the grid
voltage dips
11 Visualization of simulated variables
12 Possible installation point for grid impedances
Figure 4-2
Power supply grid with 3 PGUs operating in parallel
Note
Simulation of FRT processes in grids with low short-circuit power ratings
When simulating FRT processes on grids with low short-circuit power ratings (soft networks),
the following measures can improve the stability of the simulation:
•
Installation of a PT1 element with a time constant of 5 ms for smoothing very steep
voltage changes behind the source for the line voltage amplitude.
• Decoupling of the power generation units from the supply model by placing a memory
block in front of each phase current source in the Simscape supply model.
4.4 Deleting simulation models from projects
To delete the power generating unit model from a project, select it using the right-hand
mouse key and then select "Delete" in shortcut menu.