Supported Features

• The network impedance feature measures the equivalent admittance for each frequency seen from the specific bus.

• The results (module and angle) are either displayed on a graph or as a table.

• The impedance calculation is done using the initial states of the switches.

• Voltage sources are shorted using their internal impedances while power sources are disconnected from the circuit (open circuit).

• Synchronous machines will be automatically replaced by a ground shunt impedance:

  • R = Ra

  • L = 0.5*(Xd2 + Xq2)

Limitations

• The circuit analysis must have been done beforehand
• Only direct sequence is supported
• Single-phase elements are ignored
• Items connected to a bus with a nominal voltage of 0 are ignored
• The first segment (linear) is considered for non-linear elements