negative n.generators_t.p and n.buses_t.marginal_price

[denyin]

Dear PyPSA,

I am building a network with jet fuel and electricity balance using PyPSA framework.

I have the following two results, and I'm not sure if I'm doing something wrong or if I should add additional constraints:

• Very small negative values for the generation of biojet/jet fuels, n.generators_t.p (modeled using Generator with a given marginal cost).
• Many large negative marginal prices for fuel buses (n.buses_t.marginal_price)

Here is the .nc file for reproduction in PyPSA: https://drive.google.com/file/d/1v6usWPACU0wP2SY31q_o9cclIco_apkC/view?usp=sharing

Best,

Ying

[Fabian Hofmann]

Hey Ying,

I would not worry about small negative generation values in general. It might be a numeric artefact coming from the solver. However, it seems that your network was not solved appropriately. After rerunning the lopf, I don't see any large negative marginal prices anymore. So I suggest to rerun the optimization and see whether the problem persists.

Best

Fabian H

just from a small look at

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Fabian Hofmann 

Postdoctoral Researcher
Institute of Energy Technology
Technische Universität Berlin

Group website: https://tub-ensys.github.io/