Merge branch 'structure_dict_extension' into structure_dict_extension

Author: lezneew

pandapower/network_schema/ext_grid.py

@@ -42,15 +42,15 @@
         nullable=True,
         required=False,
         description="maxium R/X ratio of short-circuit impedance",
-        metadata={"sc": True},
+        metadata={"sc": True, "3ph": True},
     ),
     "rx_min": pa.Column(
         float,
         pa.Check.ge(0),
         nullable=True,
         required=False,
         description="minimum R/X ratio of short-circuit impedance",
-        metadata={"sc": True},
+        metadata={"sc": True, "3ph": True},
     ),
     "r0x0_max": pa.Column(
         float,

pandapower/network_schema/load.py

@@ -50,9 +50,11 @@
     "in_service": pa.Column(bool, description="specifies if the load is in service."),
     "type": pa.Column(
         pd.StringDtype,
+        pa.Check.isin(["wye", "delta"]),
         nullable=True,
         required=False,
         description="Connection Type of 3 Phase Load(Valid for three phase load flow only) Naming convention: wye, delta",
+        metadata={"3ph": True},
     ),
     "controllable": pa.Column(
         pd.BooleanDtype,

pandapower/network_schema/trafo.py

@@ -74,14 +74,14 @@
         description="Vector Groups ( required for zero sequence model of transformer )",
         metadata={"sc": True, "3ph": True},
     ),
-    "shift_degree": pa.Column(float, description="transformer phase shift angle"),
+    "shift_degree": pa.Column(float, description="transformer phase shift angle"),  # Thomas: optional
     "tap_side": pa.Column(
         pd.StringDtype,
         pa.Check.isin(["hv", "lv"]),
         nullable=True,
         required=False,
         description="defines if tap changer is at the high- or low voltage side",
-    ),
+    ),  # Thomas: null only if no tap_changer_type
     "tap_neutral": pa.Column(float, nullable=True, required=False, description="rated tap position"),
     "tap_min": pa.Column(float, nullable=True, required=False, description="minimum tap position"),
     "tap_max": pa.Column(float, nullable=True, required=False, description="maximum tap position"),