revert use of co2limit_enable for sector-coupled networks

config/config.default.yaml

@@ -89,8 +89,8 @@ electricity:
   voltages: [220., 300., 380., 500., 750.]
   gaslimit_enable: false
   gaslimit: false
-  co2limit_enable: true
-  co2limit: 0.
+  co2limit_enable: false
+  co2limit: 7.75e+7
   co2base: 1.487e+9
   agg_p_nom_limits: data/agg_p_nom_minmax.csv
 

config/test/config.electricity.yaml

@@ -24,7 +24,7 @@ snapshots:
   end: "2013-03-08"
 
 electricity:
-  co2limit_enable: true
+  co2limit_enable: false
   co2limit: 100.e+6
 
   extendable_carriers:

config/test/config.myopic.yaml

@@ -34,7 +34,7 @@ sector:
   central_heat_vent: true
 
 electricity:
-  co2limit_enable: true
+  co2limit_enable: false
   co2limit: 100.e+6
 
   extendable_carriers:

config/test/config.overnight.yaml

@@ -28,7 +28,7 @@ snapshots:
   end: "2013-03-08"
 
 electricity:
-  co2limit_enable: true
+  co2limit_enable: false
   co2limit: 100.e+6
 
   extendable_carriers:

config/test/config.perfect.yaml

@@ -31,7 +31,7 @@ snapshots:
   end: "2013-03-08"
 
 electricity:
-  co2limit_enable: true
+  co2limit_enable: false
   co2limit: 100.e+6
 
   extendable_carriers:

doc/configtables/electricity.csv

@@ -2,7 +2,7 @@
 voltages,kV,"Any subset of {220., 300., 380.}",Voltage levels to consider
 gaslimit_enable,bool,true or false,Add an overall absolute gas limit configured in ``electricity: gaslimit``.
 gaslimit,MWhth,float or false,Global gas usage limit
-co2limit_enable,bool,true or false,Add an overall absolute carbon-dioxide emissions limit configured in ``electricity: co2limit``.
+co2limit_enable,bool,true or false,Add an overall absolute carbon-dioxide emissions limit configured in ``electricity: co2limit`` in :mod:`prepare_network`. **Warning:** This option should currently only be used with electricity-only networks, not for sector-coupled networks..
 co2limit,:math:`t_{CO_2-eq}/a`,float,Cap on total annual system carbon dioxide emissions
 co2base,:math:`t_{CO_2-eq}/a`,float,Reference value of total annual system carbon dioxide emissions if relative emission reduction target is specified in ``{opts}`` wildcard.
 agg_p_nom_limits,file,path,Reference to ``.csv`` file specifying per carrier generator nominal capacity constraints for individual countries if ``'CCL'`` is in ``{opts}`` wildcard. Defaults to ``data/agg_p_nom_minmax.csv``.