Unable to add extra constrains

[martynvandijke]

Hi,

I want to add more constrains to the linear optimal Power Flow
network.lopf(snapshots=network.snapshots,extra_functionality=constrains,keep_files=True)
My constraints function looks like

def constrains():
         network = Constraint( (network.generators.p_min_pu * network.generators.p_nom ) <= network.generators.p_nom )

The constrained is not reflected in the optimisation process does anyone know what i am doing wrong ?

[nworbmot]

For (volunteer-run) support, please use the mailing list.
See https://pypsa.org/doc/optimal_power_flow.html#custom-constraints-and-other-functionality for a brief description of the custom constraints functionality, look at the examples linked there and look in the code in pypsa/opf.py for the variable names. For example, it should be e.g. network.model = Constraint(network.generators.loc[gen_name,"p_min_pu"]*network.model.generator_p_nom[gen_name] <= some_constant).

[coroa]

def constraint(network, snapshots): network.model.constraint_name = Constraint(network.generators.loc[gen_name,"p_min_pu"]*network.model.generator_p_nom[gen_name] <= some_constant) to be precise.

[martynvandijke]

Thank you for your answers, this indeed works.
I am still struggling to limit the to be calculated optimised power to a number

network.model.constraint_name = Constraint( network.generators.loc[gen_name, "p_nom_opt"] > constant )

Any ideas how to accomplish this ?

[coroa]

Please use the mailing-list for support: https://groups.google.com/group/pypsa