prepare_network: Allow lv=inf to designate a fully cost-optimal expansion

Snakefile

@@ -3,7 +3,7 @@ configfile: "config.yaml"
 localrules: all # , extract_summaries, plot_network, scenario_comparions
 
 wildcard_constraints:
-    lv="[0-9\.]+",
+    lv="[0-9\.]+|inf",
     simpl="[a-zA-Z0-9]*",
     clusters="[0-9]+m?",
     sectors="[+a-zA-Z0-9]+",

scripts/prepare_network.py

@@ -115,6 +115,7 @@ if __name__ == "__main__":
     # if 'Ep' in opts:
     #     add_emission_prices(n)
 
-    set_line_volume_limit(n, float(snakemake.wildcards.lv))
+    if snakemake.wildcards.lv != 'inf':
+        set_line_volume_limit(n, float(snakemake.wildcards.lv))
 
     n.export_to_netcdf(snakemake.output[0])