MATLAB: Double Circuit Line Modelling

Question

Hi,

I modelling double circuit line with Distributed Parameter Line. I have positive and zero sequence impedance of line and mutual impedance of lines. How to enter this data to block parameters? I think this block six=phase, but I don't know how need to form matrices of line parameters. Do you have examples?

Answer 1

Hello,

You only have to use a matrix if the line is asymmetric.

The documentation for the Distributed Parameter Line block mentions this:

For a symmetrical line, you can either specify the N-by-N matrix or the sequence parameters. For a two-phase or three-phase continuously transposed line, you can enter the positive and zero-sequence resistances [r1 r0] . For a symmetrical six-phase line you can enter the sequence parameters plus the zero-sequence mutual resistance [r1 r0 r0m].

If your line is asymmetric, you can double-click the Powergui block in your model and select Compute RLC Line Parameters . This can help you get matrices and push them into a block, although I think the information you have is more compatible with the [r1 r0 r0m] block entries.

Best,

Sebastian