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add_brownfield: disable grid expansion if LV already hit

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Numerical problems were causing infeasibilities otherwise
This commit is contained in:
Tom Brown 2023-12-08 17:53:28 +01:00
parent 00e86e6435
commit 326ed63329
1 changed files with 28 additions and 0 deletions
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28
scripts/add_brownfield.py
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@ -119,6 +119,32 @@ def add_brownfield(n, n_p, year):
n.links.loc[new_pipes, "p_nom"] = 0.0 n.links.loc[new_pipes, "p_nom"] = 0.0
n.links.loc[new_pipes, "p_nom_min"] = 0.0 n.links.loc[new_pipes, "p_nom_min"] = 0.0
def disable_grid_expansion_if_LV_limit_hit(n):
if not "lv_limit" in n.global_constraints.index:
return
#calculate minimum LV
attr = "nom_min"
dc = n.links.index[n.links.carrier == "DC"]
tot = (n.lines["s_" + attr]*n.lines["length"]).sum() + (n.links.loc[dc,"p_" + attr]*n.links.loc[dc,"length"]).sum()
diff = n.global_constraints.at["lv_limit","constant"]-tot
#allow small numerical differences
limit = 1
if diff < limit:
logger.info(f"LV is already reached (gap {diff}), disabling expansion and LV limit")
expandable_acs = n.lines.index[n.lines.s_nom_extendable]
n.lines.loc[expandable_acs,"s_nom_extendable"] = False
n.lines.loc[expandable_acs,"s_nom"] = n.lines.loc[expandable_acs,"s_nom_min"]
expandable_dcs = n.links.index[n.links.p_nom_extendable & (n.links.carrier == "DC")]
n.links.loc[expandable_dcs,"p_nom_extendable"] = False
n.links.loc[expandable_dcs,"p_nom"] = n.links.loc[expandable_dcs,"p_nom_min"]
n.global_constraints.drop("lv_limit",
inplace=True)
if __name__ == "__main__": if __name__ == "__main__":
if "snakemake" not in globals(): if "snakemake" not in globals():
@ -150,5 +176,7 @@ if __name__ == "__main__":
add_brownfield(n, n_p, year) add_brownfield(n, n_p, year)
disable_grid_expansion_if_LV_limit_hit(n)
n.meta = dict(snakemake.config, **dict(wildcards=dict(snakemake.wildcards))) n.meta = dict(snakemake.config, **dict(wildcards=dict(snakemake.wildcards)))
n.export_to_netcdf(snakemake.output[0]) n.export_to_netcdf(snakemake.output[0])