No Line Losses

[Paul Reggentin]

Hi all,

I am trying to determine the line losses for a Pypsa-Eur-Sec network, but when I use the method referenced in this thread, (power_losses = network.lines_t.p0 + network.lines_t.p1), I get 0 losses for every line, for every snapshot. This also happens if I only run pypsa-eur.

I have checked, and there is a non-zero resistance for all of the lines.

I am a bit confused, because I expected around 5-6% losses, or at least nonzero losses.

Can anyone help me understand why I'm seeing this, and if there's something unrealistic set up in the model?

Thanks,

Paul

[Neumann, Fabian]

Hi Paul,

yes, the approach is correct but the linearised power flow which PyPSA uses during optimisation ignores transmission losses. This is one limitation of the current setup.

There are ways to incorporate approximative losses in a linear model, but it becomes computationally expensive quickly:

https://github.com/fneum/power-flow-models

https://doi.org/10.1016/j.apenergy.2022.118859

An alternative could also be to run a Newton-Raphson power flow on the solved network with distributed slack (n.pf()). Here, however, the losses wouldn’t have an impact on generation and storage siting.

Hope this gives some insight.

Best wishes,

Fabian N

On 27 Jul 2022, at 17:55, Paul Reggentin <regge...@gmail.com> wrote:



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[Paul Reggentin]

Hi Fabian,

Thanks for the information. For my purposes it's alright to ignore losses in simulation, I just wanted to make sure that I didn't have a bug.

Paul