.Spot.UsersGuide.Introduction.System

Information

System Component

The model System represents a global reference for the following purposes:

It allows choosing

• nominal frequency (default 50 or 60 Hertz)
• actual system frequency or initial system frequency, depending on frequency type
• frequency type: parameter, signal, or average (machine-dependent) system frequency
• lower and upper limit-frequencies
• common phase angle for AC-systems
• reference frame for AC-systems (inertial or synchronous systems)
• transient or steady-state initialisation and simulation modes

It provides

• the system angular-frequency system.omega
  
• the system angle system.theta by integration of

   der(system.theta) = system.omega 

  This angle defines the orientation of a synchronously rotating electrical coordinate system.
  It can be used by source-models (voltage, power, generator, inverter). See 'Interfaces', 'reference connectors'.

Note: Each model using System must use it with an inner declaration and instance name system in order that it can be accessed from all objects in the model.
When dragging the 'System' from the package browser into the diagram layer, declaration and instance name are automatically generated.

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