add load shedding for all carriers

scripts/solve_network.py

@@ -350,7 +350,7 @@ def prepare_network(
         # http://journal.frontiersin.org/article/10.3389/fenrg.2015.00055/full
         # TODO: retrieve color and nice name from config
         n.add("Carrier", "load", color="#dd2e23", nice_name="Load shedding")
-        buses_i = n.buses.query("carrier == 'AC'").index
+        buses_i = n.buses.index
         if not np.isscalar(load_shedding):
             # TODO: do not scale via sign attribute (use Eur/MWh instead of Eur/kWh)
             load_shedding = 1e2  # Eur/kWh