Definition of a line from the wire configuration

Definition of the exercise

In this tutorial we are going to define a 3-phase line with 4 wires of two different types.

The cable types are the following:

name r x gmr max_current
ACSR 6/1 1.050117 0.0 0.001274 180.0
Class A / AA 0.379658 0.0 0.004267 263.0

These are taken from the data_sheets__ section

The layout is the following:

Wire x(m) y(m) Phase
ACSR 6/1 0 7 1 (A)
ACSR 6/1 0.4 7 2 (B)
ACSR 6/1 0.8 7 3 (C)
Class A / AA 0.3 6.5 0 (N)

Practice

We may start with a prepared example from the ones provided in the grids and profiles folder. The example file is Some distribution grid.xlsx. First define the wires that you are going to use in the tower. For that, we proceed to the tab Model -> Types Catalogue -> Wires.

../_images/wires.png

Then, we proceed to the tab Model -> Types Catalogue -> Overhead lines. Then we select one of the existing towers or we create one with the (+) button.

../_images/tower1.png

By clicking on the edit button (pencil) we open a ne window with the line builder editor. Here we enter the tower definition, and once we are done, we click on the compute button (calculator). THen the tower cross section will be displayed and the results will appear in the following tabs.

../_images/editor1.png

This tab shows the series impedance matrix (\Omega / km) in several forms:

  • Per phase without reduction.
  • Per phase with the neutral embedded.
  • Sequence reduction.
../_images/editorZ.png

This tab shows the series shunt admittance matrix (\mu S / km) in several forms:

  • Per phase without reduction.
  • Per phase with the neutral embedded.
  • Sequence reduction.
../_images/editorY.png

When closed, the values are applied to the overhead line catalogue type that we were editing.