Fix a bug with fuel unavailability when calculating fuel costs related to dispatch with the fuel markets module.

Author: josiahjohnston

switch_model/energy_sources/fuel_costs/markets.py

@@ -347,7 +347,10 @@ def Enforce_Fuel_Consumption_rule(m, rfm, p):
     ) 
 
     def GenFuelCosts_rule(m, g, t, f):
-        rfm = m.zone_rfm[m.gen_load_zone[g], f]
+        try:
+            rfm = m.zone_rfm[m.gen_load_zone[g], f]
+        except KeyError: # Fuel is unavailable
+            return 0.0
         p = m.tp_period[t]
         return m.GenFuelUseRate[g, t, f] * m.AverageFuelCosts[rfm, p]
     mod.GenFuelCosts = Expression(