How to simulate lossy power line on LTSpice?

Question

I need to add lossy power line in LTSpice model to be able to simulate the signal transmission over this line.

This means that I will need two components:

230 VAC power source model
asset power line model

Like that:

enter image description here

I did find ideal lossless transmission line model:

enter image description here

But this is not that I need. Is there any off the shelf solution?

If not: how do I build it my self?

Take a look at this link. Might have to create your own for the particular situation. Look at the help included with LTSpice, it's pretty good. — rdtsc, Jul 19 '15 at 19:11

score 2 · Accepted Answer · edited Apr 13 '17 at 12:32

If you're simulating a transmission distance less than 1/10 of a wavelength (so less than 60 km for a 50 Hz signal), you should get reasonable results replacing the LTRA element with a single pi or T section. For example, for a pi section you could use this in place of your 1000 m line:

schematic

^{simulate this circuit – Schematic created using CircuitLab}

Note: Values based on your other question

If you want to increase the accuracy (or the length), you can simply use mulitple cascaded sections, making sure the total R, L, and C values add up to the right number and that they're evenly distributed along the line. It's also a good idea to try the simulation with, say, 1 and 2 sections and see that the result doesn't change very much, to verify that this approximation is good enough.

PS. Actually I'd keep your answer in "slow simulation" question too. Or it is not good for some reason? — Roman Matveev, Jul 24 '15 at 19:14

How to simulate lossy power line on LTSpice?

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